BLS-GAN: A Deep Layer Separation Framework for Eliminating Bone Overlap in Conventional Radiographs.
Haolin Wang, Yafei Ou, Prasoon Ambalathankandy, Gen Ota, Pengyu Dai, Masayuki Ikebe, Kenji Suzuki 0001, Tamotsu Kamishima
AAAI, 7674, 7681, 2025
International conference proceedings

A Psychological Study: Importance of Contrast and Luminance in Color to Grayscale Mapping
Prasoon Ambalathankandy, Yafei Ou, Sae Kaneko, Masayuki Ikebe
Color and Imaging Conference, 31, 1, 55, 60, Society for Imaging Science & Technology, 13 Nov. 2023
Scientific journal

A deep registration method for accurate quantification of joint space narrowing progression in rheumatoid arthritis.
Haolin Wang, Yafei Ou, Wanxuan Fang, Prasoon Ambalathankandy, Naoto Goto, Gen Ota, Taichi Okino, Jun Fukae, Kenneth Sutherland, Masayuki Ikebe, Tamotsu Kamishima
Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society, 108, 102273, 102273, Sep. 2023, [International Magazine]
English, Scientific journal, Rheumatoid arthritis (RA) is a chronic autoimmune inflammatory disease that leads to progressive articular destruction and severe disability. Joint space narrowing (JSN) has been regarded as an important indicator for RA progression and has received significant attention. Radiology plays a crucial role in the diagnosis and monitoring of RA through the assessment of joint space. A new framework for monitoring joint space by quantifying joint space narrowing (JSN) progression through image registration in radiographic images has emerged as a promising research direction. This framework offers the advantage of high accuracy; however, challenges still exist in reducing mismatches and improving reliability. In this work, we utilize a deep intra-subject rigid registration network to automatically quantify JSN progression in the early stages of RA. In our experiments, the mean-square error of the Euclidean distance between the moving and fixed images was 0.0031, the standard deviation was 0.0661 mm and the mismatching rate was 0.48%. Our method achieves sub-pixel level accuracy, surpassing manual measurements significantly. The proposed method is robust to noise, rotation and scaling of joints. Moreover, it provides misalignment visualization, which can assist radiologists and rheumatologists in assessing the reliability of quantification, exhibiting potential for future clinical applications. As a result, we are optimistic that our proposed method will make a significant contribution to the automatic quantification of JSN progression in RA. Code is available at https://github.com/pokeblow/Deep-Registration-QJSN-Finger.git.

A deep registration method for accurate quantification of joint space narrowing progression in rheumatoid arthritis
Haolin Wang, Yafei Ou, Wanxuan Fang, Prasoon Ambalathankandy, Naoto Goto, Gen Ota, Taichi Okino, Jun Fukae, Kenneth Sutherland, Masayuki Ikebe, Tamotsu Kamishima
Computerized Medical Imaging and Graphics, 108, 102273, 102273, Elsevier BV, Sep. 2023
Scientific journal

Fully automatic software for detecting radiographic joint space narrowing progression in rheumatoid arthritis: phantom study and comparison with visual assessment
Taichi Okino, Yafei Ou, Masayuki Ikebe, Kenichi Tamura, Kenneth Sutherland, Jun Fukae, Kazuhide Tanimura, Tamotsu Kamishima
JAPANESE JOURNAL OF RADIOLOGY, 41, 5, 510, 520, May 2023
English, Scientific journal

Fully automatic software for detecting radiographic joint space narrowing progression in rheumatoid arthritis: phantom study and comparison with visual assessment.
Taichi Okino, Yafei Ou, Masayuki Ikebe, Kenichi Tamura, Kenneth Sutherland, Jun Fukae, Kazuhide Tanimura, Tamotsu Kamishima
Japanese journal of radiology, 41, 5, 510, 520, May 2023, [Domestic magazines]
English, Scientific journal, PURPOSE: We have developed an in-house software equipped with partial image phase-only correlation (PIPOC) which can automatically quantify radiographic joint space narrowing (JSN) progression. The purpose of this study was to evaluate the software in phantom and clinical assessments. MATERIALS AND METHODS: In the phantom assessment, the software's performance on radiographic images was compared to the joint space width (JSW) difference using a micrometer as ground truth. A phantom simulating a finger joint was scanned underwater. In the clinical assessment, 15 RA patients were included. The software measured the radiological progression of the finger joints between baseline and the 52nd week. The cases were also evaluated with the Genant-modified Sharp score (GSS), a conventional visual scoring method. We also quantitatively assessed these joints' synovial vascularity (SV) on power Doppler ultrasonography (0, 8, 20 and 52 weeks). RESULTS: In the phantom assessment, the PIPOC software could detect changes in JSN with a smallest detectable difference of 0.044 mm at 0.1 mm intervals. In the clinical assessment, the JSW change of the joints with GSS progression detected by the software was significantly greater than those without GSS progression (p = 0.004). The JSW change of joints with positive SV at baseline was significantly higher than those with negative SV (p = 0.024). CONCLUSION: Our in-house software equipped with PIPOC can automatically and quantitatively detect slight radiographic changes of JSW in clinically inactive RA patients.

A Sub-Pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis
Yafei Ou, Prasoon Ambalathankandy, Ryunosuke Furuya, Seiya Kawada, Tianyu Zeng, Yujie An, Tamotsu Kamishima, Kenichi Tamura, Masayuki Ikebe
IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS, 27, 1, 53, 64, Jan. 2023
English, Scientific journal

A Sub-Pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis
Ou, Yafei, Ambalathankandy, Prasoon, Furuya, Ryunosuke, Kawada, Seiya, Zeng, Tianyu, An, Yujie, Kamishima, Tamotsu, Tamura, Kenichi, Ikebe, Masayuki
IEEE Journal of Biomedical and Health Informatics, 27, 1, 53, 64, Jan. 2023
English, Scientific journal, Rheumatoid arthritis (RA) is a chronic autoimmune disease that primarily affects peripheral synovial joints, like fingers, wrists and feet. Radiology plays a critical role in the diagnosis and monitoring of RA. Limited by the current spatial resolution of radiographic imaging, joint space narrowing (JSN) progression of RA for the same reason above can be less than one pixel per year with universal spatial resolution. Insensitive monitoring of JSN can hinder the radiologist/rheumatologist from making a proper and timely clinical judgment. In this paper, we propose a novel and sensitive method that we call partial image phase-only correlation which aims to automatically quantify JSN progression in the early RA. The majority of the current literature utilizes the mean error, root-mean-square deviation and standard deviation to report the accuracy at pixel level. Our work measures JSN progression between a baseline and its follow-up finger joint images by using the phase spectrum in the frequency domain. Using this study, the mean error can be reduced to 0.0130 mm when applied to phantom radiographs with ground truth, and 0.0519 mm standard deviation for clinical radiography. With the sub-pixel accuracy far beyond usual manual measurements, we are optimistic that the proposed work is a promising scheme for automatically quantifying JSN progression.

A Sub-Pixel Accurate Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis.
Yafei Ou, Prasoon Ambalathankandy, Ryunosuke Furuya, Seiya Kawada, Tianyu Zeng, Yujie An, Tamotsu Kamishima, Kenichi Tamura, Masayuki Ikebe
IEEE journal of biomedical and health informatics, 27, 1, 53, 64, Jan. 2023, [International Magazine]
English, Scientific journal, Rheumatoid arthritis (RA) is a chronic autoimmune disease that primarily affects peripheral synovial joints, like fingers, wrists and feet. Radiology plays a critical role in the diagnosis and monitoring of RA. Limited by the current spatial resolution of radiographic imaging, joint space narrowing (JSN) progression of RA for the same reason above can be less than one pixel per year with universal spatial resolution. Insensitive monitoring of JSN can hinder the radiologist/rheumatologist from making a proper and timely clinical judgment. In this paper, we propose a novel and sensitive method that we call partial image phase-only correlation which aims to automatically quantify JSN progression in the early RA. The majority of the current literature utilizes the mean error, root-mean-square deviation and standard deviation to report the accuracy at pixel level. Our work measures JSN progression between a baseline and its follow-up finger joint images by using the phase spectrum in the frequency domain. Using this study, the mean error can be reduced to 0.0130 mm when applied to phantom radiographs with ground truth, and 0.0519 mm standard deviation for clinical radiography. With the sub-pixel accuracy far beyond usual manual measurements, we are optimistic that the proposed work is a promising scheme for automatically quantifying JSN progression.

Analytical Methods for Evaluating the Characteristics of Noise Suppression Sheets
Eiichi Sano, Masayuki Ikebe
IEEE Transactions on Electromagnetic Compatibility, 64, 4, 1052, 1057, Institute of Electrical and Electronics Engineers (IEEE), Aug. 2022
Scientific journal

Real-time tone mapping: a survey and cross-implementation hardware benchmark
Ou Y., Ambalathankandy P., Ikebe M., Takamaeda-Yamazaki S., Motomura M., Asai T.
IEEE Transactions on Circuits and Systems for Video Technology, 32, 5, 2666, 2686, Institute of Electrical and Electronics Engineers (IEEE), 05 May 2022, [Peer-reviewed]
English, Scientific journal

Joint space narrowing progression quantification with joint angle correction in rheumatoid arthritis
Yafei Ou, Prasoon Ambalathankandy, Ryunosuke Furuya, Seiya Kawada, Tamotsu Kamishima, Masayuki Ikebe
2022 14TH BIOMEDICAL ENGINEERING INTERNATIONAL CONFERENCE (BMEICON 2022), 2022
English, International conference proceedings

[Invited Paper] HDR Tone mapping: System Implementations and Benchmarking
Masayuki Ikebe, Prasoon Ambalathankandy, Yafei Ou
ITE Transactions on Media Technology and Applications, 10, 2, 27, 51, Institute of Image Information and Television Engineers, 2022
Scientific journal

Warm-cool color-based high-speed decolorization: an empirical approach for tone mapping applications.
Prasoon Ambalathankandy, Yafei Ou, Masayuki Ikebe
Journal of Electronic Imaging, 30, 4, 2021
Scientific journal

Quantification of Joint Space Width Difference on Radiography Via Phase-Only Correlation (POC) Analysis: a Phantom Study Comparing with Various Tomographical Modalities Using Conventional Margin-Contouring.
Aimi Taguchi, Shun Shishido, Yafei Ou, Masayuki Ikebe, Tianyu Zeng, Wanxuan Fang, Koichi Murakami, Toshikazu Ueda, Nobutoshi Yasojima, Keitaro Sato, Kenichi Tamura, Kenneth Sutherland, Nozomi Oki, Ko Chiba, Kazuyuki Minowa, Masataka Uetani, Tamotsu Kamishima
Journal of Digital Imaging, 34, 1, 96, 104, 2021
Scientific journal

An Adaptive Global and Local Tone Mapping Algorithm Implemented on FPGA.
Prasoon Ambalathankandy, Masayuki Ikebe, Takayuki Yoshida, Takeshi Shimada, Shinya Takamaeda, Masato Motomura, Tetsuya Asai
IEEE Transactions on Circuits and Systems for Video Technology, 30, 9, 3015, 3028, 2020
Scientific journal

FPGA-based annealing processor with time-division multiplexing
Yamamoto K., Ikebe M., Asai T., Motomura M., Takamaeda-Yamazaki S.
IEICE Transactions on Information and Systems, E102-D, 12, 2295, 2305, 01 Dec. 2019, [Peer-reviewed]
English, Scientific journal

Dither NN: hardware/algorithm co-design for accurate quantized neural networks
Ando K., Ueyoshi K., Oba Y., Hirose K., Uematsu R., Kudo T., Ikebe M., Asai T., Takamaeda-Yamazaki S., Motomura M.
IEICE Transactions on Information and Systems, E102, 12, 2341, 2353, 01 Dec. 2019, [Peer-reviewed]
English, Scientific journal

A study on a low power optimization algorithm for an edge-AI Device　　　　　　　　　　　　　　　
Kaneko T., Orimo K., Hida I., Takamaeda-Yamazaki S., Ikebe M., Motomura M., Asai T.
Nonlinear Theory and Its Applications, E10-N, 4, 373, 389, 01 Oct. 2019, [Peer-reviewed]
English, Scientific journal

Hardware-oriented algorithm and architecture for generative adversarial networks
Kaneko T., Ikebe M., Takamaeda-Yamazaki S., Motomura M., Asai T.
Journal of Signal Processing, 23, 4, 151, 154, 20 Jul. 2019, [Peer-reviewed]
English, Scientific journal

2.4 GHz wake-up receiver with suppressed substrate noise coupling
Shota Hiramatsu, Masayuki Ikebe, Eiichi Sano
Analog Integrated Circuits and Signal Processing, 100, 1, 23, 29, Springer New York LLC, 15 Jul. 2019
English, Scientific journal

Wideband terahertz imaging pixel with a small on-chip antenna in 180 nm CMOS　　　　　　　　　　　　　　　
Y. Kanazawa, S. Yokoyama, S. Hiramatsu, E. Sano, T. Ikegami, Y. Takida, P. Ambalathanakandy, H. Minamide, M. Ikebe
JJAP, 58, Apr. 2019, [Peer-reviewed]
English, Scientific journal

5.8 A 32×32-Pixel 0.9THz Imager with Pixel-Parallel 12b VCO-Based ADC in 0.18μm CMOS
Sayuri Yokoyama, Masayuki Ikebe, Yuri Kanazawa, Takahiro Ikegami, Prasoon Ambalathankandy, Shota Hiramatsu, Eiichi Sano, Yuma Takida, Hiroaki Minamide
Digest of Technical Papers - IEEE International Solid-State Circuits Conference, 2019-, 108, 110, Institute of Electrical and Electronics Engineers Inc., 06 Mar. 2019
English, International conference proceedings

A 32×32-Pixel 0.9THz Imager with Pixel-Parallel 12b VCO-Based ADC in 0.18μm CMOS.
Sayuri Yokoyama, Masayuki Ikebe, Yuri Kanazawa, Takahiro Ikegami, Prasoon Ambalathankandy, Shota Hiramatsu, Eiichi Sano, Yuma Takida, Hiroaki Minamide
IEEE International Solid- State Circuits Conference(ISSCC), 43, 11(IST2019 12-22), 108, 110, IEEE, 2019

Automatic Radiographic Quantification of Joint Space Narrowing Progression in Rheumatoid Arthritis Using POC.
Yafei Ou, Prasoon Ambalathankandy, Takeshi Shimada, Tamotsu Kamishima, Masayuki Ikebe
16th IEEE International Symposium on Biomedical Imaging(ISBI), 1183, 1187, IEEE, 2019
International conference proceedings

Radiography Contrast Enhancement: Smoothed LHE Filter a Practical Solution for Digital X-Rays with Mach Band.
Prasoon Ambalathankandy, Yafei Ou, Jyotsna Kochiyil, Shinya Takamaeda, Masato Motomura, Tetsuya Asai, Masayuki Ikebe
2019 Digital Image Computing: Techniques and Applications(DICTA), 1, 8, IEEE, 2019
International conference proceedings

3D Integrated Pixel Sensor with Silicon-on-Insulator Technology for the International Linear Collider Experiment.
Miho Yamada, Shun Ono, Yasuo Arai, Ikuo Kurachi, Toru Tsuboyama, Masayuki Ikebe, Makoto Motoyoshi
2019 International 3D Systems Integration Conference (3DIC)(3DIC), 1, 4, IEEE, 2019
International conference proceedings

Real-time HDTV to 4K and 8K-UHD conversions using anti-aliasing based super resolution algorithm on FPGA
Ambalathankandy P, Takamaeda-Yamazaki S, Motomura M, Asai T, Ikebe M, Kusano H
Microprocessors and Microsystems, 60, 21, 31, 01 Dec. 2018, [Peer-reviewed]
English, Scientific journal

Quantization error-based regularization for hardware-aware neural network training　　　　　　　　　　　　　　　
Hirose K, Uematsu R, Ando K, Ueyoshi K, Ikebe M, Asai T, Motomura M, Takamaeda-Yamazaki S
Nonlinear Theory and Its Applications, E9-N, 4, 453, 465, 01 Oct. 2018, [Peer-reviewed]
English, Scientific journal

CMOS terahertz imaging pixel with a VCO-based ADC　　　　　　　　　　　　　　　
S. Yokoyama, M. Ikebe, Y. Kanazawa, T. Ikegami, P. Ambalathankandy, S. Hiramatsu, E. Sano, Y. Takida, H. Minamide
2018 Int'l Conf. Solid State Devices and Materials, Sep. 2018, [Peer-reviewed]
English, International conference proceedings

CMOS terahertz imaging pixel with a wideband on-chip antenna　　　　　　　　　　　　　　　
Y. Kanazawa, S. Hiramatsu, E. Sano, S. Yokoyama, P. Ambalathankandy, M. Ikebe
2018 43rd International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Sep. 2018, [Peer-reviewed]
English, International conference proceedings

BRein memory: a single-chip binary/ternary reconfigurable in-memory deep neural network accelerator achieving 1.4TOPS at 0.6W
Ando K, Ueyoshi K, Orimo K, Yonekawa H, Sato S, Nakahara H, Takamaeda-Yamazaki S, Ikebe M, Asai T, Kuroda T, Motomura M
IEEE Journal of Solid-State Circuits, 53, 4, 983, 994, 01 Apr. 2018, [Peer-reviewed]
English, Scientific journal

2.4 GHzウェイクアップ受信機の試作と評価
平松正太, 池辺 将之, 佐野 栄一
電子情報通信学会論文誌, J101-C, 3, 147, 155, Mar. 2018, [Peer-reviewed], [Invited]
Japanese

Proto-computing architecture over a digital medium aiming at real-time video processing
Tanibata A, Schmid A, Takamaeda-Yamazaki S, Ikebe M, Motomura M, Asai T
Complexity, 2018, 3618621-1, 11, 15 Feb. 2018, [Peer-reviewed]
English, Scientific journal

Analysis of Smoothed LHE Methods for Processing Images with Optical Illusions.
Prasoon Ambalathankandy, Takeshi Shimada, Shinya Takamaeda, Masato Motomura, Tetsuya Asai, Masayuki Ikebe
IEEE Visual Communications and Image Processing(VCIP), 1, 4, IEEE, 2018
International conference proceedings

Area and Energy Optimization for Bit-Serial Log-Quantized DNN Accelerator with Shared Accumulators.
Takumi Kudo, Kodai Ueyoshi, Kota Ando, Kazutoshi Hirose, Ryota Uematsu, Yuka Oba, Masayuki Ikebe, Tetsuya Asai, Masato Motomura, Shinya Takamaeda-Yamazaki
12th IEEE International Symposium on Embedded Multicore/Many-core Systems-on-Chip(MCSoC), 237, 243, IEEE Computer Society, 2018
International conference proceedings

Sparse Disparity Estimation Using Global Phase Only Correlation for Stereo Matching Acceleration.
Takeshi Shimada, Masayuki Ikebe, Prasoon Ambalathankandy, Shinya Takamaeda-Yamazaki, Masato Motomura, Tetsuya Asai
2018 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP), 1842, 1846, IEEE, 2018
International conference proceedings

Dither NN: An Accurate Neural Network with Dithering for Low Bit-Precision Hardware.
Kota Ando, Kodai Ueyoshi, Yuka Oba, Kazutoshi Hirose, Ryota Uematsu, Takumi Kudo, Masayuki Ikebe, Tetsuya Asai, Shinya Takamaeda-Yamazaki, Masato Motomura
International Conference on Field-Programmable Technology(FPT), 6, 13, IEEE, 2018
International conference proceedings

Equivalent circuit analysis of artificial dielectric layers　　　　　　　　　　　　　　　
E. Sano, M. Ikebe
Progress In Electromagnetics Research M, 60, 85, 92, Sep. 2017, [Peer-reviewed]
English, Scientific journal

6-DoF camera position and posture estimation based on local patches of image sequence
Tsuji T, Ikebe M, Takamaeda-Yamazaki S, Motomura M, Asai T
Journal of Signal Processing, 21, 4, 191, 194, Research Institute of Signal Processing, Japan, 20 Jul. 2017, [Peer-reviewed]
English, Scientific journal, We propose real-time camera position and posture estimation with six degrees of freedom (6-DoF) based on local patches of an image sequence. Our method alternately performs camera motion calculation and depth map reconstruction. Using the reconstructed depth map on only edge regions of images, our estimation method was 30% faster than that based on all pixels and achieved robust motion tracking compared with the feature-points-based method.

A multithreaded CGRA for convolutional neural network processing
Ando K, Takamaeda-Yamazaki S, Ikebe M, Asai T, Motomura M
Circuits and Systems, 8, 6, 149, 170, 29 Jun. 2017, [Peer-reviewed]
English, Scientific journal

A high performance and energy efficient microprocessor with a novel restricted dynamically reconfigurable accelerator
Hida I, Takamaeda-Yamazaki S, Ikebe M, Motomura M, Asai T
Circuits and Systems, 8, 5, 134, 147, 19 May 2017, [Peer-reviewed]
English, Scientific journal

An energy-efficient dynamic branch predictor with a two-clock-cycle naive Bayes classifier for pipelined RISC microprocessors
Hida I, Takamaeda-Yamazaki S, Ikebe M, Motomura M, Asai T
Nonlinear Theory and Its Applications, E8-N, 3, 235, 245, 19 May 2017, [Peer-reviewed]
English, Scientific journal

Design and Fabrication of Terahertz Detectors Based on 180-nm CMOS Process Technology
Kosuke Wakita, Eiichi Sano, Masayuki Ikebe, Stevanus Arnold, Taiichi Otsuji, Yuma Takida, Hiroaki Minamide
FUNDAMENTAL AND APPLIED PROBLEMS OF TERAHERTZ DEVICES AND TECHNOLOGIES, 58, 3&4, 33, 41, 2017, [Peer-reviewed]
English, International conference proceedings

Quantization Error-Based Regularization in Neural Networks.
Kazutoshi Hirose, Kota Ando, Kodai Ueyoshi, Masayuki Ikebe, Tetsuya Asai, Masato Motomura, Shinya Takamaeda-Yamazaki
Artificial Intelligence XXXIV - 37th SGAI International Conference on Artificial Intelligence, 137, 142, Springer, 2017
International conference proceedings

In-memory area-efficient signal streaming processor design for binary neural networks.
Haruyoshi Yonekawa, Shimpei Sato, Hiroki Nakahara, Kota Ando, Kodai Ueyoshi, Kazutoshi Hirose, Kentaro Orimo, Shinya Takamaeda-Yamazaki, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
IEEE 60th International Midwest Symposium on Circuits and Systems(MWSCAS), 116, 119, IEEE, 2017
International conference proceedings

Low latency divider using ensemble of moving average curves.
Yuhan Fu, Masayuki Ikebe, Takeshi Shimada, Tetsuya Asai, Masato Motomura
18th International Symposium on Quality Electronic Design(ISQED), 397, 402, IEEE, 2017
International conference proceedings

Exploring optimized accelerator design for binarized convolutional neural networks.
Kodai Ueyoshi, Kota Ando, Kentaro Orimo, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
2017 International Joint Conference on Neural Networks(IJCNN), 2510, 2516, IEEE, 2017
International conference proceedings

Logarithmic Compression for Memory Footprint Reduction in Neural Network Training.
Kazutoshi Hirose, Ryota Uematsu, Kota Ando, Kentaro Orimo, Kodai Ueyoshi, Masayuki Ikebe, Tetsuya Asai, Shinya Takamaeda-Yamazaki, Masato Motomura
Fifth International Symposium on Computing and Networking(CANDAR), 291, 297, IEEE Computer Society, 2017
International conference proceedings

A Time-Division Multiplexing Ising Machine on FPGAs.
Kasho Yamamoto, Weiqiang Huang, Shinya Takamaeda-Yamazaki, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
Proceedings of the 8th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies(HEART), 3, 6, ACM, 2017
International conference proceedings

FPGA implementation of edge-guided pattern generation for motion-vector estimation of textureless objects.
Aoi Tanibata, Alexandre Schmid, Shinya Takamaeda-Yamazaki, Masayuki Ikebe, Masato Motomura, Tetsuya Asai
27th International Conference on Field Programmable Logic and Applications(FPL), 1, 1, IEEE, 2017
International conference proceedings

Accelerating deep learning by binarized hardware.
Shinya Takamaeda-Yamazaki, Kodai Ueyoshi, Kota Ando, Ryota Uematsu, Kazutoshi Hirose, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
2017 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference(APSIPA), 1045, 1051, IEEE, 2017
International conference proceedings

Electrical characterization and microwave application of polyacrylonitrile/carbon nanotube-based carbon fibers
Eiichi Sano, Takehito Watanuki, Masayuki Ikebe, Bunshi Fugetsu
Japanese Journal of Applied Physics, 56, 9, Japan Society of Applied Physics, 2017, [Peer-reviewed]
English, Scientific journal

High impedance properties of two-dimensional composite right/left-handed transmission lines
Eiichi Sano, Masayuki Ikebe
Progress In Electromagnetics Research C, 76, 55, 62, Electromagnetics Academy, 2017, [Peer-reviewed]
English, Scientific journal

An Image Sensor/Processor 3D Stacked Module featuring ThruChip Interfaces
Masayuki Ikebe, Tetsuya Asai, Masafumi Mori, Toshiyuki Itou, Daisuke Uchida, Yasuhiro Take, Tadahiro Kuroda, Masato Motomura
2017 22ND ASIA AND SOUTH PACIFIC DESIGN AUTOMATION CONFERENCE (ASP-DAC), 7, 8, 2017, [Peer-reviewed]
English, International conference proceedings

Design and fabrication of terahertz detectors based on 180 nm CMOS process technology
脇田幸典, 池辺将之, ARNOLD Stevanus, 尾辻泰一, 瀧田佑馬, 南出泰亜, 佐野栄一
電子情報通信学会技術研究報告, ED2016-83, 375(ED2016 80-95), 17, 22, Dec. 2016
Japanese

FPGA-based stream processing for frequent itemset mining with incremental multiple hashes
Yamamoto K, Ikebe M, Asai T, Motomura M
Circuits and Systems, 7, 10, 3299, 3309, 25 Aug. 2016, [Peer-reviewed]
English, Scientific journal

3D stacked imager featuring inductive coupling channels for high speed/low-noise image transfer
Ikebe M, Uchida D, Take Y, Someya M, Chikuda S, Matsuyama K, Asai T, Kuroda T, Motomura M
ITE Transactions on Media Technology and Applications, 4, 2, 142, 148, The Institute of Image Information and Television Engineers, 01 Apr. 2016, [Peer-reviewed]
English, Scientific journal, This paper proposes 3D stacked module consisting of image sensor and digital logic dies connected through inductive coupling channels. Evaluation of a prototype module revealed radiation noise from the inductive coils to the image sensor is less than 0.4-LSB range along with ADC code, i.e., negligible. Aiming at high frame rate image sensor/processing module exploiting this attractive off-die interface, we also worked on resolving another throughput-limiter, namely power consuming Time to Digital Converter (TDC) used in column parallel ADCs. Novel intermittent TDC operation scheme presented in this paper can reduce its power dissipation 57% from conventional ones.

Bit-depth expansion for noisy contour reduction in natural images.
Akira Mizuno, Masayuki Ikebe
2016 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP), 1671, 1675, IEEE, 2016
International conference proceedings

A 2-clock-cycle Naïve Bayes classifier for dynamic branch prediction in pipelined RISC microprocessors.
Itaru Hida, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
2016 IEEE Asia Pacific Conference on Circuits and Systems(APCCAS), 297, 300, IEEE, 2016
International conference proceedings

Motion-Vector Estimation and Cognitive Classification on an Image Sensor/Processor 3D Stacked System featuring ThruChip Interfaces
Tetsuya Asai, Masafumi Mori, Toshiyuki Itou, Yasuhiro Take, Masayuki Ikebe, Tadahiro Kuroda, Masato Motomura
ESSCIRC CONFERENCE 2016, 105, 108, 2016, [Peer-reviewed]
English, International conference proceedings

An FPGA-Optimized Architecture of Anti-Aliasing based Super Resolution for Real-Time HDTV to 4K-and 8K-UHD Conversions
Hotaka Kusano, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
2016 INTERNATIONAL CONFERENCE ON RECONFIGURABLE COMPUTING AND FPGAS (RECONFIG16), 1, 6, 2016, [Peer-reviewed]
English, International conference proceedings

Design and fabrication of a terahertz imaging array in 180-nm CMOS process technology
Kosuke Wakita, Eiichi Sano, Masayuki Ikebe, Stevanus Arnold, Taiichi Otsuji, Yuma Takida, Hiroaki Minamide
2016 21ST INTERNATIONAL CONFERENCE ON MICROWAVE, RADAR AND WIRELESS COMMUNICATIONS (MIKON), 2016, [Peer-reviewed]
English, International conference proceedings

FPGA Architecture for Feed-Forward Sequential Memory Network targeting Long-Term Time-Series Forecasting
Kentaro Orimo, Kota Ando, Kodai Ueyoshi, Masayuki Ikebe, Tetsuya Asai, Masato Motomura
2016 INTERNATIONAL CONFERENCE ON RECONFIGURABLE COMPUTING AND FPGAS (RECONFIG16), 1, 6, 2016, [Peer-reviewed]
English, International conference proceedings

Low-power single-slope analog-to-digital converter with intermittently working time-to-digital converter
D. Uchida, M. Ikebe, J. Motohisa, E. Sano
J. Signal Processing, 19, 6, 219, 226, Nov. 2015, [Peer-reviewed]
English, Scientific journal

Low-power, small-size transmitter module with metamaterial antenna
Kazuki Hiraishi, Toshiki Wada, Keishi Kubo, Yutaro Otsu, Masayuki Ikebe, Eiichi Sano
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 83, 1, 1, 9, Apr. 2015, [Peer-reviewed]
English, Scientific journal

[Paper] Smooth Gradation Reconstruction from False Contours in Quantized Natural Image
Mizuno Akira, Ikebe Masayuki
ITE Transactions on Media Technology and Applications, 3, 4, 251, 257, The Institute of Image Information and Television Engineers, 2015
English, We propose a bit-depth expansion (BDE) method targeting natural images. In the analog part of an imaging system, signal intensity fluctuations occur due to noise (e.g. thermal noise in the image sensor). After that, in the digital part, the intensities are rounded off to limited levels. The latter process, which is quantization, increases the intensity of fluctuation errors caused by stochastic resonance. These errors are viewed as false contour artifacts in the gradation region. Our goal was to obtain the original signal from the quantized noisy signal. We formulated a probabilistic model based on this quantization process, and successfully reconstructed smooth gradations from noisy contours. Subjective evaluation by voting clarified that the output image has higher quality.

Halo control for LHE based local adaptive tone mapping.
Yuta Kimura, Masayuki Ikebe
2015 IEEE International Conference on Image Processing(ICIP), 3911, 3915, IEEE, 2015
International conference proceedings

3D Stacked Imager featuring Inductive Coupling Channels for High Speed/Low-Noise Image Transfer
IKEBE Masayuki, UCHIDA Daisuke, TAKE Yasuhiro, SOMEYA Makito, CHIKUDA Satoshi, MATSUYAMA Kento, ASAI Tetsuya, KURODA Tadahiro, MOTOMURA Masato
ITE Technical Report, 39, 35(IST2015 43-56), 17, 20, The Institute of Image Information and Television Engineers, 2015
Japanese, This paper proposes 3D stacked module consisting of image sensor and digital logic dies connected through inductive coupling channels. Evaluation of a prototype module revealed radiation noise from the inductive coils to the image sensor is less than 0.4-LSB range along with ADC code, i.e., negligible. Aiming at high frame rate image sensor/processing module exploiting this attractive off-die interface, we also worked on resolving another throughput-limiter, namely power consuming TDC used in column parallel ADCs. Novel intermittent TDC operation scheme presented in this paper can reduce its power dissipation 57% from conventional ones.

Image Sensor/Digital Logic 3D Stacked Module featuring Inductive Coupling Channels for High Speed/Low-Noise Image Transfer
Masayuki Ikebe, Daisuke Uchida, Yasuhiro Take, Makito Someya, Satoshi Chikuda, Kento Matsuyama, Tetsuya Asai, Tadahiro Kuroda, Masato Motomura
2015 SYMPOSIUM ON VLSI CIRCUITS (VLSI CIRCUITS), 82, 2015, [Peer-reviewed]
English, International conference proceedings

FPGA-based design for motion-vector estimation exploiting high-speed imaging and its application to motion classification with neural networks
Mori M, Itou T, Ikebe M, Asai T, Kuroda T, Motomura M
Journal of Signal Processing, 18, 4, 165, 168, 30 Jul. 2014, [Peer-reviewed]
English, Scientific journal

自動しきい値補償型Dickson Charge Pumpによる整流特性の効率化　　　　　　　　　　　　　　　
謝侃, 池辺将之, 本久順一, 佐野栄一
映情学技報, 38, 26, 61, 64, Jul. 2014
Japanese, Symposium

2.4 GHz帯プリバイアス型整流回路の試作と評価　　　　　　　　　　　　　　　
吉川知秀, 平石一貴, 和田敏輝, 池辺将之, 佐野栄一
映情学技報, 38, 26, 55, 59, Jul. 2014
Japanese, Symposium

間欠動作TDCを用いたシングルスロープADC構成の検討”　　　　　　　　　　　　　　　
染谷槙人, 内田大輔, 池辺将之, 本久順一, 佐野栄一
映情学技報, 38, 26, 51, 54, Jul. 2014
Japanese, Symposium

Design and fabrication of 2.4 GHz pre-biased rectifier
Yutaro Otsu, Keishi Kubo, Masayuki Ikebe, Eiichi Sano
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 79, 2, 301, 307, May 2014, [Peer-reviewed]
English, Scientific journal

CMOS common-mode rejection filter with floating active transformer operation
Daisuke Uchida, Masayuki Ikebe, Junichi Motohisa, Eiichi Sano, Akira Kondou
JAPANESE JOURNAL OF APPLIED PHYSICS, 53, 4, 04EE20-1, 04EE20-6, Apr. 2014, [Peer-reviewed]
English, Scientific journal

A 12-bit, 5.5-mu W Single-Slope ADC using Intermittent Working TDC with Multi-Phase Clock Signals
Daisuke Uchida, Masayuki Ikebe, Junichi Motohisa, Eiichi Sano
2014 21ST IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS AND SYSTEMS (ICECS), 770, 773, 2014, [Peer-reviewed]
English, International conference proceedings

CMOS common-mode filter with gyrator-C network　　　　　　　　　　　　　　　
D. Uchida, M. Ikebe, J. Motohisa, E. Sano, A. Kondou
Int'l Conf. Solid State Devices and Materials, 886, 887, Sep. 2013, [Peer-reviewed]
English, International conference proceedings

FPGA implementation of single-image super resolution based on frame-bufferless box filtering
Sanada Y, Ohira T, Chikuda S, Igarashi M, Ikebe M, Asai T, Motomura M
Journal of Signal Processing, 17, 4, 111, 114, 30 Jul. 2013, [Peer-reviewed]
English, Scientific journal

メタマテリアルアンテナを用いた低電力小型送信モジュール　　　　　　　　　　　　　　　
平石一貴, 和田敏輝, 久保圭史, 大津雄太郎, 池辺将之, 佐野栄一
映情学技報, 37, 29, 63, 68, Jul. 2013
Japanese, Symposium

Low-power wake-up receiver with subthreshold CMOS circuits for wireless sensor networks
Kazuhiro Takahagi, Hiromichi Matsushita, Tomoki Iida, Masayuki Ikebe, Yoshihito Amemiya, Eiichi Sano
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 75, 2, 199, 205, May 2013, [Peer-reviewed]
English, Scientific journal

Smooth Gradation Reconstruction by Poisson Equation
Mizuno Akira, Igarashi Masaki, Ikebe Masayuki
The Journal of the Institute of Television Engineers of Japan, 67, 8, J326, J333, The Institute of Image Information and Television Engineers, 2013
Japanese, A novel approach for bit-depth expansion is proposed. When displaying a low bit-depth image on a monitor, false contour artifacts tend to appear in the gradation region. Such false contours seriously degrade the image quality. Reconstructing smooth gradations from false contours is crucial yet it remains difficult problem for 2D images. The proposed method enables the 2D interpolation problem to be separated into a 1D problem by using the Poisson equation. An output image with mathematically smooth gradations can be obtained.

Accuracy improvement of histogram-based image filtering.
Masaki Igarashi, Akira Mizuno, Masayuki Ikebe
IEEE International Conference on Image Processing(ICIP), 1217, 1221, IEEE, 2013
International conference proceedings

60-GHz, 9-μW wake-up receiver for short-range wireless communications
Toshiki Wada, Masayuki Ikebe, Eiichi Sano
European Solid-State Circuits Conference, 383, 386, IEEE, 2013, [Peer-reviewed]
English, International conference proceedings

Hardware-Oriented Stereo Vision Algorithm based on 1-D Guided Filtering and its FPGA Implementation.
Katsuki Ohata, Yuki Sanada, Tetsuro Ogaki, Kento Matsuyama, Takanori Ohira, Satoshi Chikuda, Masaki Igarashi, Masayuki Ikebe, Tetsuya Asai, Masato Motomura, Tadahiro Kuroda
2013 IEEE 20TH INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS, AND SYSTEMS (ICECS), 169, 172, 2013, [Peer-reviewed]
English, International conference proceedings

A 11b 5.1μW multi-slope ADC with a TDC using multi-phase clock signals
K. Kim, M. Ikebe, J. Motohisa, E. Sano
IEEE International Conference on Electronics, Circuits, and Systems, 512, 515, IEEE, Dec. 2012, [Peer-reviewed]
English, International conference proceedings

インターリーブ動作による高速ランプ波形発生器　　　　　　　　　　　　　　　
内田大輔, 近藤 亮, 池辺将之, 本久順一, 佐野栄一
LSIとシステムのワークショップ2012, 228, 229, May 2012
Japanese, Symposium

60GHz帯低電力直接検波回路　　　　　　　　　　　　　　　
和田敏輝, 高萩和宏, 池辺将之, 雨宮好仁, 佐野栄一
LSIとシステムのワークショップ2012, 255, 257, May 2012
Japanese, Symposium

Fast bilateral filtering using recursive moving sum
Igarashi Masaki, Ikebe Masayuki, Shimoyama Sohsuke, Motohisa Junichi
Nonlinear Theory and Its Applications, IEICE, 3, 2, 222, 232, The Institute of Electronics, Information and Communication Engineers, 2012
English, We propose a constant-time algorithm for a bilateral filter. Bilateral filter can be converted into the operation of three-dimensional (3D) convolution. By using recursive moving sum, we can reduce the number of calculations needed to construct a pseudo-Gaussian filter. Applying one-dimensional Gaussian filter to the 3D convolution, we achieved a constant-time bilateral filter. We used a 3-GHz CPU without SIMD instructions, or multi-thread operations. We confirmed our proposed bilateral filter to be processed in constant time. In practical conditions, high PSNR values over 40 dB are obtained.

A 0.6-4.5 GHz Inductorless CMOS Low Noise Amplifier With Gyrator-C network
A. Kondou, M. Ikebe, J. Motohisa, Y. Amemiya, E. Sano
IEEE International Conference on Electronics, Circuits, and Systems, 326, 329, IEEE, Dec. 2011, [Peer-reviewed]
English, International conference proceedings

センサネットワークのための極低消費電力ウェイクアップ受信器　　　　　　　　　　　　　　　
高萩和宏, 松下拓道, 飯田智貴, 池辺将之, 雨宮好仁, 佐野栄一
第24回 回路とシステムワークショップ, 300, 304, Aug. 2011, [Peer-reviewed]
Japanese, Symposium

容量分圧動作を用いたsingle-slope A/D変換器　　　　　　　　　　　　　　　
金基秀, 池辺将之, 本久順一, 佐野栄一
LSIとシステムのワークショップ2011, 201, 203, May 2011
Japanese, Symposium

A CMOS Imager with negative feedback pixel circuits and its applications
Masayuki Ikebe, Junichi Motohisa
INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS, 8194, 2011, [Peer-reviewed]
English, International conference proceedings

Column parallel single-slope ADC with time to digital converter for CMOS imager
M. Shin, M. Ikebe, J. Motohisa, E. Sano
17th IEEE International Conference on Electronics, Circuits, and Systems, 865, 868, IEEE, Dec. 2010, [Peer-reviewed]
English, International conference proceedings

O(1) BILATERAL FILTERING WITH LOW MEMORY USAGE
Masaki Igarashi, Masayuki Ikebe, Sousuke Shimoyama, Kenta Yamano, Junichi Motohisa
2010 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, 3301, 3304, 2010, [Peer-reviewed]
English, International conference proceedings

Local adaptive tone mapping with composite multiple gamma functions.
Sohsuke Shimoyama, Masaki Igarashi, Masayuki Ikebe, Junichi Motohisa
Proceedings of the International Conference on Image Processing(ICIP), 3153, 3156, IEEE, 2009
International conference proceedings

A 3.1-10.6 GHz RF CMOS circuits monolithically integrated with dipole antenna
Masayuki Ikebe, Daisuke Ueo, Kazuhiro Takahagi, Masaki Ohuno, Yusuke Takada, Eiichi Sano
2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009, 17, 20, IEEE, 2009, [Peer-reviewed]
English, International conference proceedings

Ultra-Wideband Silicon On-chip Antennas with Artificial Dielectric Layer
Kazuhiro Takahagi, Masaki Ohno, Masayuki Ikebe, Eiichi Sano
2009 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATION SYSTEMS (ISPACS 2009), 81, 84, 2009, [Peer-reviewed]
English, International conference proceedings

Frequency and phase lock operation using clock-period comparator　　　　　　　　　　　　　　　
Y. Makihara, M. Ikebe, J. Motohisa, E. Sano
Proc. of Intl. Symposium on Multimedia and Communication Technology (ISMAC), 241, 244, Jan. 2009, [Peer-reviewed]
English, International conference proceedings

A 0.18um 3GHz true single phase clocking divider-by-3 circuit　　　　　　　　　　　　　　　
M. Ikebe, J. Motohisa, E. Sano
2008 WSEAS Intl. Conf. on Circuits, Systems, Electronics, Control & Signal Processing, 110, 113, Dec. 2008, [Peer-reviewed]
English, International conference proceedings

Phase lock operation by clock-period comparison for all digital PLL　　　　　　　　　　　　　　　
Y. Makihara, M. Ikebe, J. Motohisa, E. Sano
Intl. Symposium on Topical Problems of Nonlinear Wave Physics (NWP), 49, 50, Jul. 2008, [Peer-reviewed]
English, International conference proceedings

The design of high frequency true single phase clocking divider-by-3 circuit　　　　　　　　　　　　　　　
M. Ikebe, Y. Takada, M. Ohuchi, J. Motohisa, E. Sano
Int. J. Circuits, Systems and Signal processing, 2, 3, 219, 228, 2008, [Peer-reviewed]
English, Scientific journal

Evaluation of digitally controlled PLL by clock-period comparison
Yukinobu Makihara, Masayuki Ikebe, Eiichi Sano
IEICE TRANSACTIONS ON ELECTRONICS, E90C, 6, 1307, 1310, Jun. 2007, [Peer-reviewed]
English, Scientific journal

7-GHz CMOS RF front-end monolithically integrated with inverted-F antenna for wireless sensor system
M. Ikebe, D. Ueo, H. Osabe, K. Inafune, E. Sano, M. Koutai, M. Ikeda, K. Mashiko
TRANSDUCERS '07 & EUROSENSORS XXI, DIGEST OF TECHNICAL PAPERS, VOLS 1 AND 2, 2007, [Peer-reviewed]
English, International conference proceedings

CMOS Image Sensor Using Negative-Feedback Resetting to Obtain Variably Smoothed Images.
Masayuki Ikebe, Keita Saito
IEICE Transactions on Electronics, 89-C, 11, 1662, 1669, 2006
Scientific journal

7-GHz inverted-F antenna monolithically integrated with CMOS LNA
Daisuke Ueo, Hiroshi Osabe, Koji Inafune, Masayuki Ikebe, Eiichi Sano, Masato Koutani, Masayuki Ikeda, Koichiro Mashiko
2006 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS, VOLS 1 AND 2, 235, 238, 2006, [Peer-reviewed]
English, International conference proceedings

A digital vision chip for early feature extraction with rotated template-matching cellular automata
Ikebe M, Asai T
Journal of Robotics and Mechatronics, 17, 4, 372, 377, Aug. 2005, [Peer-reviewed]
English, Scientific journal

A quadrilateral-object composer for binary images with reaction-diffusion cellular automata
Asai T, Ikebe M, Hirose T, Amemiya Y
International Journal of Parallel, Emergent and Distributed Systems, 20, 1, 57, 68, Mar. 2005, [Peer-reviewed]
English, Scientific journal

On-chip fixed-pattern-noise canceling with non-destructive intermediate readout circuitry for CMOS active-pixel sensors　　　　　　　　　　　　　　　
Kagaya R, Ikebe M, Asai T, Amemiya Y
WSEAS Transactions on Circuits and Systems, 3, 3, 477, 479, May 2004, [Peer-reviewed]
English, Scientific journal

A quadrilateral-object composer for binary images with reaction-diffusion cellular automata
Masayuki Ikebe, Tetsuya Asai, Tetsuya Hirose, Yoshihito Amemiya
Proceedings of 2004 IEEE Asia-Pacific Conference on Advanced System Integrated Circuits, 406, 409, 2004, [Peer-reviewed]
International conference proceedings

A novel CMOS circuit for depressing synapse and its application to contrast-invariant pattern classification and synchrony detection
Kanazawa Y, Asai T, Ikebe M, Amemiya Y
International Journal of Robotics and Automation, 19, 4, 206, 212, 2004, [Peer-reviewed]
English, Scientific journal

A single-electron circuit as a discrete dynamical system
Oya T, Takahashi Y, Ikebe M, Asai T, Amemiya Y
Superlattices and Microstructures, 34, 3-6, 253, 258, Sep. 2003, [Peer-reviewed]
English, Scientific journal

A MOS vision chip based on the cellular-automaton processing
Asai T, Sunayama T, Amemiya Y, Ikebe M
Japanese Journal of Applied Physics, 40, 4B, 2585, 2592, INSTITUTE OF PURE AND APPLIED PHYSICS, Apr. 2001, [Peer-reviewed]
English, Scientific journal, A neuron MOS ($\nu$MOS) vision chip was designed and fabricated for developing high-speed parallel image-processing systems based on cellular-automaton processing. The chip consists of cellular $\nu$MOS circuits that implement two fundamental functions in digital image processing: i) cleaning up noise in binary images and ii) detecting edges in the images, in addition to photosensing and image quantizing. Experimental results reveal that the fabricated chip successfully extracted edges from noisy inputs, which demonstrates the great potential of the $\nu$MOS vision chip in future image-processing applications.

Cellular νMOS circuits performing edge detection with difference-of-Gaussian Filters
Sunayama T, Ikebe M, Asai T, Amemiya Y
Japanese Journal of Applied Physics, 39, 4B, 2278, 2286, The Japan Society of Applied Physics, Apr. 2000, [Peer-reviewed]
English, Scientific journal, Aiming at the development of high-speed image processors, we propose a cellular νMOS circuit that performs the processing of edge detection. The proposed circuit uses neuron MOS (νMOS) transistors for analog convolution operations with Gaussian-shaped kernel functions, which makes the circuit organization extremely simple as compared with that of conventional convolution circuits. Performances of the proposed circuit are evaluated by simulation program with integrated circuit emphasis (SPICE). The results show the usefulness of the cellular νMOS circuit in image-processing applications.

nu-MOS cellular-automaton devices for intelligent image sensors.
Masayuki Ikebe, Masamichi Akazawa, Yoshihito Amemiya
Knowledge-Based Intelligent Electronic Systems, 447, 453, IEEE, 1998
International conference proceedings

Perceptual evaluation of decolorization algorithms to study subjectively appealing color contrast information
Prasoon Ambalathankandy, Yafei Ou, Sae Kaneko, Masayuki Ikebe, PERCEPTION, 51, 108, 109, Dec. 2022
English, Summary international conference

Optimization of Automatic In-house Software for Detecting the Joint Destruction in RA Patients Using Reliability Index
OKINO Taichi, OKINO Taichi, OU Yafei, IKEBE Masayuki, SAGAWA Akira, KATO Masaru, ATSUMI Tatsuya, KAMISHIMA Tamotsu, 日本医学物理学会学術大会報文集, 123rd, 2022

Optimization of Automatic In-house Software for Detecting the Joint Destruction in RA Patients Using Reliability Index
OKINO Taichi, OKINO Taichi, OU Yafei, IKEBE Masayuki, SAGAWA Akira, KATO Masaru, ATSUMI Tatsuya, KAMISHIMA Tamotsu, 日本放射線技術学会総会学術大会予稿集, 78th, 2022

Application of Reliability Index to POC Analysis for Detection of Finger JSN Progression in RA
AN Yujie, KAWADA Seiya, OU Yafei, IKEBE Masayuki, FURUSAKI Akira, SAGAWA Akira, KAMISHIMA Tamotsu, 日本医学放射線学会総会抄録集, 81st, 2022

Automatic Partial Image Phase Only Correlation Analysis Can Detect Radiographic Finger Joint Space Narrowing in Rheumatoid Arthritis
OKINO Taichi, OU Yafei, IKEBE Masayuki, FUKAE Jun, TANIMURA Kazuhide, KAMISHIMA Tamotsu, 日本医学物理学会学術大会報文集, 121st, 2021

Pitfall of Phase Only Correlation (POC) Analysis in Detection of Radiographic Finger Joint Space Narrowing in Rheumatoid Arthritis
AN Yujie, ZENG Tianyu, OU Yafei, IKEBE Masayuki, FURUSAKI Akira, SAGAWA Akira, KAMISHIMA Tamotsu, 日本医学放射線学会総会抄録集, 80th, 2021

Automatic Partial Image Phase Only Correlation Analysis Can Detect Radiographic Finger Joint Space Narrowing in Rheumatoid Arthritis
OKINO Taichi, OU Yafei, IKEBE Masayuki, FUKAE Jun, TANIMURA Kazuhide, KAMISHIMA Tamotsu, 日本放射線技術学会総会学術大会予稿集, 77th, 2021

Characteristics evaluation of high conversion gain pixel for stacked image sensor
渡部俊久, 為村成亨, 峰尾圭忠, 宮川和典, 新井俊希, 難波正和, 島本洋, 池辺将之, 電子情報通信学会大会講演論文集(CD-ROM), 2021, 2021

A Calibration Technique in Gain and Responsivity for Global Shutter CMOS Terahertz Image Sensor
池辺将之, 金澤悠里, 鎌田夏実, 平田脩馬, 電子情報通信学会技術研究報告(Web), 121, 39(MWP2021 1-8), 2021

テラヘルツイメージングセンサとその補正技術
池辺将之, 平田脩馬, 金澤悠里, 光アライアンス, 32, 6, 2021

Development of Local Adaptive Image Processing for Image Sensors and Its Prospects
池辺将之, AMBALATHANKANDY Prasoon, YAFEI Ou, 映像情報メディア学会誌, 75, 6, 2021

A study on VCO-ADCs using Continuous-Sampling for Image Sensors
鎌田夏実, 金澤悠里, 池辺将之, 映像情報メディア学会技術報告, 45, 21(IST2021 41-47), 2021

Quantitative Assement of Joint Space in Phantom Simulating Small Joint: Validity of Radiography Using Phase Only Correlation (POC) in Comparison with High Performance CTs
TAGUCHI Aimi, SHISHIDO Shun, OU Yafei, YASOJIMA Nobutoshi, TAMURA Kenichi, IKEBE Masayuki, KAMISHIMA Tamotsu, 日本放射線技術学会総会学術大会予稿集, 76th, 2020

Comparison between Radiography and Tomosynthesis in Detectability for a Minute Change of Finger Joint Space Narrowing: POC Analysis of Phantom in Water Tank
ZENG Tianyu, KONDO Mana, YASOJIMA Nobutoshi, TAMURA Kenichi, OU Yafei, IKEBE Masayuki, KAMISHIMA Tamotsu, 日本放射線技術学会総会学術大会予稿集, 76th, 2020

Automatic Finger Joint Space Narrowing Analysis by Phase Only Correlation (POC) in Rheumatoid Patients
OKINO Taichi, OU Yafei, IKEBE Masayuki, FUKAE Jun, TANIMURA Kazuhide, KAMISHIMA Tamotsu, 日本放射線技術学会総会学術大会予稿集, 76th, 2020

Automatic Finger Joint Space Narrowing Analysis by Phase Only Correlation (POC) in Rheumatoid Patients
OKINO Taichi, OU Yafei, IKEBE Masayuki, FUKAE Jun, TANIMURA Kazuhide, KAMISHIMA Tamotsu, 日本医学物理学会学術大会報文集, 119th, 2020

Quantitative Assessment of Joint Space in Phantom Simulating Small Joint: Validity of Radiography Using Phase Only Correlation (POC) in Comparison with High Performance CTs
TAGUCHI Aimi, SHISHIDO Shun, OU Yafei, YASOJIMA Nobutoshi, TAMURA Kenichi, IKEBE Masayuki, KAMISHIMA Tamotsu, 日本医学物理学会学術大会報文集, 119th, 2020

Comparison between Radiography and Tomosynthesis in Detectability for a Minute Change of Finger Joint Space Narrowing: POC Analysis of Phantom in Water Tank
ZENG Tianyu, KONDO Mana, YASOJIMA Nobutoshi, TAMURA Kenichi, OU Yafei, IKEBE Masayuki, KAMISHIMA Tamotsu, 日本医学物理学会学術大会報文集, 119th, 2020

イメージセンサ技術の最新動向 2章 テラヘルツイメージングの最新動向
池辺将之, 映像情報メディア学会誌, 74, 2, 2020

Gain calibration technique for global shutter CMOS terahertz image sensor pixels
平田脩馬, 永安佑次, 澤口浩太朗, 金澤悠里, 池辺将之, 映像情報メディア学会技術報告, 44, 17(IST2020 39-42), 2020

Image Electronics Information Sensing
秋田純一, 井口義則, 池辺将之, 丸山基之, 関根寛, 黒田理人, 香川景一郎, 小室孝, 徳田崇, 船津良平, 西山円, 廣瀬裕, 藤澤大介, 杉山行信, 映像情報メディア学会誌, 74, 5, 2020

先端電子技術と新技術開発 グローバルシャッタ型CMOSテラヘルツセンサの開発
池辺将之, ケミカルエンジニヤリング, 65, 11, 2020

Fast and Adaptive Luminance Channel Representation for Post-Sensing
池辺将之, AMBALATHANKANDY Prasoon, OU Yafei, 映像情報メディア学会技術報告, 44, 29(IST2020 43-51), 2020

イメージセンサと局所適応型画像処理の開発とその展望
池辺将之, 映像情報メディア学会冬季大会講演予稿集(CD-ROM), 2020, 2020

テラヘルツイメージセンサの最新技術
池辺 将之, 金澤 悠里, 光技術コンタクト, 57, 7, 32, 42, Jul. 2019, [Invited]
Japanese, Introduction scientific journal

Dither NN:画像処理から着想を得た組込み向け量子化ニューラルネットワークの精度向上手法
安藤洸太, 植吉晃大, 大羽由華, 廣瀬一俊, 工藤巧, 池辺将之, 浅井哲也, 高前田伸也, 本村真人, 電子情報通信学会技術研究報告, 119, 18(RECONF2019 1-19)(Web), 2019

Gain calibration technique for CMOS terahertz image sensor pixels to compensate the process variation
池上高広, 平田脩馬, 澤口浩太朗, 永安佑次, 金澤悠里, 池辺将之, 電子情報通信学会技術研究報告, 119, 162(ICD2019 1-17), 2019

32×32画素並列ADC構成によるグローバルシャッタ型CMOSテラヘルツイメージセンサ
池辺将之, 金澤悠里, 横山紗由里, 池上高広, AMBALATHANKANDY Prasoon, 平松正太, 佐野栄一, 瀧田佑馬, 南出泰亜, シンポジウムテラヘルツ科学の最先端講演要旨集, 2019, 2019

Sub-pixel Quantification of Joint Space Narrowing Progression for Radiographic Diagnosis
池辺将之, YAFEI Ou, AMBALATHANKANDY Prasoon, 神島保, 映像情報メディア学会技術報告, 43, 36(IST2019 53-58), 2019

ZDDを用いた三角形分割パターンの列挙とその応用に向けて
熊澤輝顕, 鈴木浩史, 石畠正和, 浅井哲也, 池辺将之, 本村真人, 高前田伸也, 人工知能学会人工知能基本問題研究会資料, 106th, 10‐14, 07 Mar. 2018
Japanese

革新的機能をもつイメージセンサー テラヘルツ光イメージセンサー
池辺将之, 佐野栄一, 光学, 47, 1, 2018

投影型イメージング質量分析用時間検知型半導体検出器の開発 IX
藤田陽一, 新井康夫, 松岡久典, 本堂敏信, 間久直, 河井洋輔, 青木順, 豊田岐聡, 粟津邦男, 池辺将之, SEOKJIN N., 日本物理学会講演概要集(CD-ROM), 73, 1, 2018

映像情報メディア年報2018シリーズ(第10回)情報センシングの研究開発動向
浜本隆之, 大高俊徳, 池辺将之, 樽木久征, 小林昌弘, 黒田理人, 小室孝, 徳田崇, 船津良平, 近藤亨, 廣瀬裕, 藤澤大介, 山本洋夫, 映像情報メディア学会誌, 72, 4, 2018

An electronic circuit model for an early auditory system based on vestibulo-ocular reflex
池上高広, 池辺将之, 高前田伸也, 本村真人, 浅井哲也, 電子情報通信学会技術研究報告, 118, 173(ICD2018 14-38), 2018

Wide-band CMOS terahertz imaging pixel
金澤悠里, 平松正太, 佐野栄一, 横山紗由里, 池辺将之, 電子情報通信学会技術研究報告, 118, 173(ICD2018 14-38), 2018

Development of a Pixel Detector for Stigmatic Imaging Mass Spectrometry
間久直, 本堂敏信, 松岡久典, 青木順, 河井洋輔, 豊田岐聡, 粟津邦男, 池辺将之, 藤田陽一, 新井康夫, 電気学会研究会資料, OQD-18-053-058, 2018

投影型イメージング質量分析用時間検知型半導体検出器の開発 X
藤田陽一, 新井康夫, 松岡久典, 本堂敏信, 間久直, 河井洋輔, 青木順, 豊田岐聡, 粟津邦男, 池辺将之, SEOKJIN N., 日本物理学会講演概要集(CD-ROM), 73, 2, 2018

対数量子化を用いた可変長ビットシリアル型DNNアクセラレータの面積最適化手法
工藤巧, 植吉晃大, 安藤洸太, 植松瞭太, 廣瀬一俊, 池辺将之, 浅井哲也, 本村真人, 高前田伸也, 電子情報通信学会技術研究報告, 118, 63(RECONF2018 1-18)(Web), 2018

二値化ニューラルネットワークに基づいたハードウェア指向高精度モデルの検討
大羽由華, 安藤洸太, 廣瀬一俊, 植吉晃大, 植松瞭太, 工藤巧, 黒川圭一, 池辺将之, 浅井哲也, 本村真人, 高前田伸也, 電子情報通信学会技術研究報告, 118, 63(RECONF2018 1-18)(Web), 2018

Quantization Error-aware Neural Network Training
廣瀬 一俊, 安藤 洸太, 植吉 晃大, 池辺 将之, 浅井 哲也, 本村 真人, 高前田 伸也, 人工知能基本問題研究会, 104, 1, 4, 08 Aug. 2017
人工知能学会, Japanese

依頼講演 BRein Memory : バイナリ・インメモリ再構成型深層ニューラルネットワークアクセラレータ (情報センシング)
安藤 洸太, 植吉 晃大, 折茂 健太郎, 米川 晴義, 佐藤 真平, 中原 啓貴, 池辺 将之, 浅井 哲也, 高前田 伸也, 黒田 忠広, 本村 真人, 映像情報メディア学会技術報告 = ITE technical report, 41, 25, 101, 106, Jul. 2017
映像情報メディア学会, Japanese

SOI image sensor for ion flight time measurement using thermal noise suppressing sample hold circuit
羅 晳珍, 池辺 将之, 横山 紗由里, 高前田 伸也, 本村 真人, 浅井 哲也, 間 久直, 藤田 陽一, 新井 康夫, 映像情報メディア学会技術報告 = ITE technical report, 41, 25, 35, 38, Jul. 2017
映像情報メディア学会, Japanese

Time variation reduction of shoot-through current for TDC+Single-Slope ADC architecture
横山 紗由里, 池辺 将之, 羅 晳珍, 高前田 伸也, 本村 真人, 浅井 哲也, 映像情報メディア学会技術報告 = ITE technical report, 41, 25, 27, 30, Jul. 2017
映像情報メディア学会, Japanese

Miniaturization of on-chip antenna for CMOS terahertz imaging
平松 正太, 脇田 幸典, ナ ソクジン, 横山 紗由里, 池辺 将之, 佐野 栄一, 映像情報メディア学会技術報告 = ITE technical report, 41, 25, 89, 94, Jul. 2017
映像情報メディア学会, Japanese

時分割多重機構を用いた高密度FPGAイジングマシン
山本佳生, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 117, 44(CPSY2017 1-15), 2017

対数量子化による深層ニューラルネットワークのメモリ量削減
廣瀬一俊, 植松瞭太, 安藤洸太, 折茂健太郎, 植吉晃大, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 117, 44(CPSY2017 1-15), 2017

動的再構成ハードウェアアーキテクチャを活かしたCNNの実装と評価
植松瞭太, 廣瀬一俊, 安藤洸太, 折茂健太郎, 植吉晃大, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 117, 46(RECONF2017 1-21), 2017

FPGAを用いたCNNの最適ハードウェア構成とその二値化検討
植吉晃大, 安藤洸太, 折茂健太郎, 高前田伸也, 池辺将之, 本村真人, 浅井哲也, 電子情報通信学会技術研究報告, 117, 46(RECONF2017 1-21), 2017

二値化ニューラルネットワークアクセラレータのアーキテクチャ検討
安藤洸太, 植吉晃大, 廣瀬一俊, 折茂健太郎, 植松瞭太, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 117, 46(RECONF2017 1-21), 2017

ハードウェアディープラーニングアクセラレータの研究動向
植吉晃大, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2017, 2017

テラヘルツイメージセンサ用スロットアンテナの設計
平松正太, 脇田幸典, 池辺将之, 佐野栄一, 電子情報通信学会大会講演論文集(CD-ROM), 2017, 2017

高次数イジングネットワークの時分割処理方式の検討
山本佳生, 熊澤輝顕, 池辺将之, 浅井哲也, 本村真人, 高前田伸也, 電子情報通信学会技術研究報告, 117, 153(CPSY2017 16-39), 2017

Time variation reduction of shoot-through current for TDC+Single-Slope ADC architecture
横山紗由里, 池辺将之, NA Sokuzinn, 高前田伸也, 本村真人, 浅井哲也, 電子情報通信学会技術研究報告, 117, 166(SDM2017 31-49), 2017

SOI image sensor for ion flight time measurement using thermal noise suppressing sample hold circuit
NA Seokjin, 池辺将之, 横山紗由里, 高前田伸也, 本村真人, 浅井哲也, 間久直, 藤田陽一, 新井康夫, 電子情報通信学会技術研究報告, 117, 166(SDM2017 31-49), 2017

Miniaturization of on-chip antenna for CMOS terahertz imaging
平松正太, 脇田幸典, NA Seokjin, 横山紗由里, 池辺将之, 佐野栄一, 電子情報通信学会技術研究報告, 117, 166(SDM2017 31-49), 2017

BRein Memory:バイナリ・インメモリ再構成型深層ニューラルネットワークアクセラレータ
安藤洸太, 植吉晃大, 折茂健太郎, 米川晴義, 佐藤真平, 中原啓貴, 池辺将之, 浅井哲也, 高前田伸也, 黒田忠広, 本村真人, 電子情報通信学会技術研究報告, 117, 166(SDM2017 31-49), 2017

テラヘルツ帯広帯域オンチップアンテナの設計
平松正太, 池辺将之, 佐野栄一, 電子情報通信学会大会講演論文集(CD-ROM), 2017, 2017

CMOSテラヘルツイメージング用オンチップアンテナの小型化
平松正太, NA Seokjin, 横山紗由里, 池辺将之, 佐野栄一, 映像情報メディア学会年次大会講演予稿集(CD-ROM), 2017, 2017

シリコンCMOSプロセスを用いたテラヘルツ検出器
佐野栄一, 池辺将之, シンポジウムテラヘルツ科学の最先端講演要旨集, 2017, 2017

メモリアクセスパターンを考慮した遅延評価によるZDD構築の高速化
熊澤輝顕, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 回路とシステムワークショップ論文集(CD-ROM), 30th, 2017

Design and fabrication of a terahertz imaging circuit in CMOS process technology
脇田 幸典, 佐野 栄一, 池辺 将之, Arnold Stevanus, 尾辻 泰一, 瀧田 佑馬, 南出 泰亜, 映像情報メディア学会技術報告 = ITE technical report, 40, 24, 19, 24, Aug. 2016
映像情報メディア学会, Japanese

2nd Order Delta-Sigma ADC using Voltage Controlled Ring-Delay Line
羅 晳珍, 池辺 将之, 内田 大輔, 横山 紗由里, 佐野 栄一, 木下 康大, 映像情報メディア学会技術報告 = ITE technical report, 40, 24, 15, 18, Aug. 2016
映像情報メディア学会, Japanese

Design and fabrication of a terahertz imaging circuit in CMOS process technology
脇田幸典, 佐野栄一, 池辺将之, ARNOLD Stevanus, 尾辻泰一, 瀧田佑馬, 南出泰亜, 電子情報通信学会技術研究報告, 116, 173, 19, 24, 01 Aug. 2016
電子情報通信学会, Japanese

2nd Order Delta-Sigma ADC using Voltage Controlled Ring-Delay Line
NA Seokjin, 池辺将之, 内田大輔, 横山紗由里, 佐野栄一, 木下康大, 電子情報通信学会技術研究報告, 116, 173, 15, 18, 01 Aug. 2016
電子情報通信学会, Japanese

C-10-10 Design of terahertz imaging detector in CMOS
Wakita Kosuke, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2016, 2, 67, 67, 01 Mar. 2016
The Institute of Electronics, Information and Communication Engineers, Japanese

2.4GHzウェイクアップ受信機の設計と評価
平松正太, 吉川知秀, 池辺将之, 佐野栄一, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

CMOSテラヘルツイメージングディテクタの設計
脇田幸典, 池辺将之, 佐野栄一, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

映像情報メディア年報2015シリーズ(第9回)情報センシングの研究開発動向
須川成利, 大竹浩, 池辺将之, 佐藤俊明, 小林昌弘, 黒田理人, 浜本隆之, 小室孝, 徳田崇, 山下誉行, 綱井史郎, 廣瀬裕, 赤井大輔, 山本洋夫, 映像情報メディア学会誌, 70, 4, 2016

Intelligent Global Processing using Topology-Preservation Cellular-Automata Rules
池辺将之, 電子情報通信学会技術研究報告, 116, 151(NLP2016 33-43), 2016

オーバーサンプリング・アンチエリアス技術を用いた8K解像度向け超解像
草野穂高, 池辺将之, 浅井哲也, 本村真人, Optics & Photonics Japan講演予稿集(CD-ROM), 2016, 2016

視線推定における黒目中心検出処理を行うセルオートマトンLSIアーキテクチャ
岩丸直登, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

大局および局所適応型輝度補正とその直観的I/F
池辺将之, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

CMOSテラヘルツ検出器の設計と評価
脇田幸典, 池辺将之, ARNOLD Stevanus, 尾辻泰一, 瀧田佑馬, 南出泰亜, 佐野栄一, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

無地物体の動き検出のための縞模様形成アーキテクチャ
谷端蒼, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

アンチエイリアシングによるUHDTV向け単一画像超解像のFPGA実装
草野穂高, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

高エネルギー効率プロセッサの実現に向けたナイーブベイズ分類器による動的分岐予測
肥田格, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

局所移動平均を用いた除算器の効率的な実装手法
FU Yuhan, 池辺将之, 島田武, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2016, 2016

深層畳み込みニューラルネットワークの転移学習による個人識別システム
廣瀬一俊, 高前田伸也, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 116, 364(ICD2016 51-99), 2016

輪郭情報からテクスチャを自動形成する非線形画像処理アルゴリズムとそのFPGA実装
谷端蒼, 牛田実穂, 高前田伸也, 池辺将之, 本村真人, 浅井哲也, 電子情報通信学会技術研究報告, 116, 364(ICD2016 51-99), 2016

ナイーブベイズ分類器を用いた動的分岐予測器の設計と評価
肥田格, 高前田伸也, 池辺将之, 本村真人, 浅井哲也, 電子情報通信学会技術研究報告, 116, 364(ICD2016 51-99), 2016

局所移動平均を用いた補間曲線の性質とその回路応用
島田武, 池辺将之, 付宇かん, 高前田伸也, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 116, 364(ICD2016 51-99), 2016

大局および局所適応型輝度補正技術の効率的なハードウェア化の検討
吉田嵩志, 池辺将之, 島田武, 高前田伸也, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 116, 364(ICD2016 51-99), 2016

直交位相検出TDCを用いたシングルスロープADCの回路構成検討
横山紗由里, 羅晰珍, 内田大輔, 池辺将之, 浅井哲也, 本村真人, 電子情報通信学会技術研究報告, 116, 364(ICD2016 51-99), 2016

Image Electronics Information Sensing
Sugawa Shigetoshi, Yamashita Takayuki, Tsunai Shiro, Hirose Yutaka, Akai Daisuke, Yamamoto Hiroo, Ohtake Hiroshi, Ikebe Masayuki, Sato Toshiaki, Kobayashi Masahiro, Kuroda Rihito, Hamamoto Takayuki, Komuro Takashi, Tokuda Takashi, The Journal of The Institute of Image Information and Television Engineers, 70, 7, 609, 622, 2016
The Institute of Image Information and Television Engineers, Japanese

Development of multi-tap CMOS lock-in pixel imager with a high time-resolution for time-resolved measurements (Information Sensing Technologies)
IKEBE Masayuki, UCHIDA Daisuke, TAKE Yasuhiro, SOMEYA Makito, CHIKUDA Satoshi, MATSUYAMA Kento, ASAI Tetsuya, KURODA Tadahiro, MOTOMURA Masato, ITE Technical Report, 39, 44, 17, 20, Nov. 2015
This paper proposes 3D stacked module consisting of image sensor and digital logic dies connected through inductive coupling channels. Evaluation of a prototype module revealed radiation noise from the inductive coils to the image sensor is less than 0.4-LSB range along with ADC code, i.e., negligible. Aiming at high frame rate image sensor/processing module exploiting this attractive off-die interface, we also worked on resolving another throughput-limiter, namely power consuming TDC used in column parallel ADCs. Novel intermittent TDC operation scheme presented in this paper can reduce its power dissipation 57% from conventional ones., The Institute of Image Information and Television Engineers, English

A-1-20 A Low Power TDC with Intermittent Operation for CMOS Image Sensor
Uchida Daisuke, Ikebe Masayuki, Someya Makito, Chikuda Satoshi, Asai Tetsuya, Motomura Masato, Proceedings of the IEICE Engineering Sciences Society/NOLTA Society Conference, 2015, 20, 20, 25 Aug. 2015
The Institute of Electronics, Information and Communication Engineers, Japanese

Stochastic Resonance Ring-delay-line ADC for a low amplitude signal detection
木下康大, 池辺将之, 本久順一, 佐野栄一, 電子情報通信学会技術研究報告, 115, 124, 33, 36, 02 Jul. 2015
電子情報通信学会, Japanese

Stochastic Resonance Ring-delay-line ADC for a low amplitude signal detection
木下 康大, 池辺 将之, 本久 順一, 映像情報メディア学会技術報告 = ITE technical report, 39, 22, 33, 36, Jul. 2015
映像情報メディア学会, Japanese

A-1-27 Intermittent Working TDC with Multi-phase Clock signals using NAND Delay Chain
Uchida Daisuke, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2015, 27, 27, 24 Feb. 2015
The Institute of Electronics, Information and Communication Engineers, Japanese

CMOSイメージセンサ用低電力間欠動作カラムTDC
内田大輔, 池辺将之, 染谷槙人, 築田聡史, 浅井哲也, 本村真人, 電子情報通信学会大会講演論文集(CD-ROM), 2015, 2015

量子化過程の確率的モデルを用いた画像のビット深度拡張技術
水野暁, 池辺将之, Optics & Photonics Japan講演予稿集(CD-ROM), 2015, 2015

Column parallel SS-ADC with TDC using multi-phase clock signals for CMOS imagers(Circuit technologies,2nd Asian Image Sensors and Imaging Systems Symposium)
Ikebe Masayuki, Uchida Daisuke, Someya Makito, Watanabe Kaori, Kinoshita Koudai, Chikuda Satoshi, Motohisa Juinichi, ITE Technical Report, 38, 47, 13, 14, 24 Nov. 2014
We propose a single-slop ADC with a time to digital converter (TDC) that uses a multi-phase clock. When the TDC with resolution of n bits is adapted to the ADC, the conversion time is reduced by a factor of 2^n. Applying the TDC that uses multi-phase-clock signal reduced the number of circuit elements, achieved consistency between the single-slope ADC and the TDC, and realized robust meta-stability., The Institute of Image Information and Television Engineers, English

C-12-40 Fabrication and measurement of 2.4GHz rectifier
Yoshikawa Tomohide, Hiraishi Kazuki, Wada Toshiki, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2014, 2, 104, 104, 04 Mar. 2014
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-20 A 60GHz Wake-up Receiver with CDR Circuit
Wada Toshiki, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2014, 2, 84, 84, 04 Mar. 2014
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-21 60GHz on-chip metamaterial antenna
Hiraishi Kazuki, Wada Toshiki, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2014, 2, 85, 85, 04 Mar. 2014
The Institute of Electronics, Information and Communication Engineers, Japanese

FPGA-based Design for Motion-Vector Estimation exploiting High-Speed imaging and its Application to Machine Learning
MORI Masafumi, ITOU Toshiyuki, IKEBE Masayuki, ASAI Tetsuya, KURODA Tadahiro, MOTOMURA Masato, Technical report of IEICE. ICD, 113, 419, 25, 25, 21 Jan. 2014
The Institute of Electronics, Information and Communication Engineers, Japanese

SOI Pixel Image Sensors and Their Scientific Applications
川人祥二, 亀濱博紀, SHRESTHA Sumeet, 安富啓太, 香川景一郎, 池辺将之, 新井康夫, 映像情報メディア学会技術報告, 38, 15(IST2014 8-17), 2014

Fablication and measurement of 2.4 GHz pre-biased rectifier
吉川知秀, 平石一貴, 和田敏輝, 池辺将之, 佐野栄一, 電子情報通信学会技術研究報告, 114, 120(ICD2014 19-30), 2014

High-Efficiency Dickson Charge Pump using an Automatic threshold-Voltage Cancellation
KAN Xie, 池辺将之, 本久順一, 佐野栄一, 電子情報通信学会技術研究報告, 114, 120(ICD2014 19-30), 2014

Study on a Single Slope ADC with intermittent TDC
染谷槙人, 内田大輔, 池辺将之, 本久順一, 佐野栄一, 電子情報通信学会技術研究報告, 114, 120(ICD2014 19-30), 2014

トーンカーブによる適応的局所補正手法
池辺将之, Optics & Photonics Japan講演予稿集(CD-ROM), 2014, 2014

Recent progress in the technology linking sensors and digital circuits
Masayuki Ikebe, IEICE ELECTRONICS EXPRESS, 11, 3, 20142003, 20142003, 2014
English

Bit-depth extension using Poisson's equation
MIZUNO Akira, IKEBE Masayuki, ITE Technical Report, 37, 40, 45, 48, Sep. 2013
A novel approach for bit-depth expansion is proposed. When displaying a low bit-depth image on a monitor, false contour artifacts tend to appear in the gradation region. Such false contours seriously degrade the image quality. Reconstructing smooth gradations from false contours is crucial yet it remains difficult problem for 2D images. The proposed method enables the 2D interpolation problem to be separated into a 1D problem. An output image with smooth gradations can be obtained by using the Poisson equation., The Institute of Image Information and Television Engineers, Japanese

Low-power Millimeter-wave Receiver for Sensor Networks
和田 敏輝, 池辺 将之, 佐野 栄一, 回路とシステムワークショップ論文集 Workshop on Circuits and Systems, 26, 357, 362, 29 Jul. 2013
[電子情報通信学会], Japanese

Low-Power-Consumption Driving in Single-Slope ADC with Multi-phase TDC
内田大輔, 染谷槙人, 池辺将之, 本久順一, 佐野栄一, 電子情報通信学会技術研究報告, 113, 112, 97, 100, 04 Jul. 2013
電子情報通信学会, Japanese

Low-Power-Consumption Driving in Single-Slope ADC with Multi-phase TDC
内田 大輔, 染谷 槙人, 池辺 将之, 映像情報メディア学会技術報告 = ITE technical report, 37, 29, 97, 100, Jul. 2013
映像情報メディア学会, Japanese

A-1-14 A 11b 5.luW Multi-slope ADC with TDC using Multi-phase Clocks
Kim Kisu, Uchida Daisuke, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2013, 14, 14, 05 Mar. 2013
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-22 Alow-power, small size transmitter module for Wireless sensors
Hiraishi Kazuki, Wada Toshiki, Kubo Keishi, Otsu Yutaro, Ikeda Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2013, 2, 93, 93, 05 Mar. 2013
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-31 Fabrication and measurement of 2.4 GHz rectifier
Otsu Yutaro, Kubo Keishi, Ikeda Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2013, 2, 102, 102, 05 Mar. 2013
The Institute of Electronics, Information and Communication Engineers, Japanese

Low-power, small-size transmitter module with metamaterial antenna
平石一貴, 和田敏輝, 久保圭史, 大津雄太郎, 池辺将之, 佐野栄一, 電子情報通信学会技術研究報告, 113, 112(ICD2013 24-46), 2013

Smooth Gradation Reconstruction by Poisson Equation
水野暁, 五十嵐正樹, 池辺将之, 映像情報メディア学会誌(Web), 67, 8, 2013

Image Electronics Information Sensing
Sugawa Shigetoshi, Akai Daisuke, Suzuki Hideyuki, Takayanagi Isao, Takahashi Hidekazu, Kuroda Rihito, Ikebe Masayuki, Hamamoto Takayuki, Komuro Takashi, Kagawa Keiichirou, Ohtake Hiroshi, The Journal of The Institute of Image Information and Television Engineers, 67, 11, 972, 982, 2013
The Institute of Image Information and Television Engineers, Japanese

C-12-9 The fabrication and measurement of the 60 GHz detector
Wada Toshiki, Takahagi Kazuhiro, Ikebe Masayuki, Amemiya Yoshihito, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2012, 2, 82, 82, 28 Aug. 2012
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-22 Low-power PWM clock data recovery circuit
Kubo Keishi, Takahagi Kazuhiro, Ikebe Masayuki, Amemiya Yoshihito, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2012, 2, 95, 95, 28 Aug. 2012
The Institute of Electronics, Information and Communication Engineers, Japanese

An interleaved ramp-wave generator for high-speed single-slope ADC
内田大輔, 池辺将之, 本久順一, 佐野栄一, 近藤亮, 電子情報通信学会技術研究報告, 112, 159, 45, 48, 26 Jul. 2012
電子情報通信学会, Japanese

An interleaved ramp-wave generator for high-speed single-slope ADC
内田 大輔, 池辺 将之, 本久 順一, 映像情報メディア学会技術報告, 36, 31, 45, 48, Jul. 2012
映像情報メディア学会, Japanese

Local Adaptive High-Speed Single Image Dehazing
MIZUNO Akira, IKEBE Masayuki, IGARASHI Masaki, MOTOHISA Junichi, ITE Technical Report, 36, 20, 9, 12, 21 May 2012
We propose a fast single image dehazing method that uses the local statistics of the dark channel. In single image dehazing, a haze-free image is created from a single hazed image by calculating the transmission map of the haze. There is a high computational cost to this process because it requires a complex matrix operation. We have therefore focused on the local histogram of the dark channel in order to refine the transmission map more quickly. In the proposed method, edges of the regions and objects in the transmission map are recovered using the local histogram of the dark channel. We achieved an operation time dozens of times faster than the conventional method, thereby successfully reducing the memory consumption., The Institute of Image Information and Television Engineers, Japanese

C-12-30 Low-power CMOS logic circuits consisting of stack structure
Kubo Keishi, Ikebe Masayuki, Amemiya Yoshihito, Sano Eiichi, Proceedings of the IEICE General Conference, 2012, 2, 06 Mar. 2012
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-67 Direct Conversion Mixer with DC offset cancelling
Kondou Akira, Ikebe Masayuki, Motohisa Junichi, Amemiya Yoshihito, Sano Eiichi, Proceedings of the IEICE General Conference, 2012, 2, 06 Mar. 2012
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-2 A Low Power Multi-slope ADC with Time to Digital Converter
Kim Kisu, Ikebe Masayuki, Motohisa Junichi, Amemiya Yoshihito, Sano Eiichi, Proceedings of the IEICE General Conference, 2012, 06 Mar. 2012
The Institute of Electronics, Information and Communication Engineers, Japanese

Study on Automatic Parameter Control for Local Adaptive Tone Mapping
加藤直人, 池辺将之, 本久順一, 下山荘介, 情報処理学会研究報告(CD-ROM), 2012, 1, 2012

An approach to control halo suppression for local adaptive tone mapping
Shimoyama Sousuke, Ikebe Masayuki, Igarashi Masaki, Mizuno Akira, Motohisa Junichi, ITE Technical Report, 35, 47, 9, 12, 11 Nov. 2011
Local Histogram Equalization (LHE), which is efficient for High Dynamic Range (HDR) compression, requires a large amount of calculation and induces unnatural image quality. Using checker-wise histogram acquisition and line buffer, memory accessing for local histograms is processed in O(1) time. For improving image quality, we proposed approximation of LHE by compositing gamma functions. Moreover the weighting of local histogram is developed by introducing mean values of bins for the suppression and control of halo effect. We set the range of parameters for controlling halo effect by sensitivity evaluation., The Institute of Image Information and Television Engineers, Japanese

C-12-47 Low-power CMOS logic circuits consisting of stack structure
Kubo Keishi, Ikebe Masayuki, Amemiya Yoshihito, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2011, 2, 30 Aug. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-24 Current Driven Mixer with Intermediate Frequency Amplifier using Active Inductor Load
Kondou Akira, Ikebe Masayuki, Motohisa Junichi, Amemiya Yoshihito, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2011, 30 Aug. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-37 Metastability Reducing for Single-Slope ADC with Time to Digital Converter
Kim Kisu, Ikebe Masayuki, Motohisa Junichi, Amemiya Yoshihito, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2011, 30 Aug. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

A-4-7 A Note on the Mach Bands in the Locally Transformed Image
Shimoyama Sohsuke, Ikebe Masayuki, Igarashi Masaki, Mizuno Akira, Motohisa Junichi, Proceedings of the Society Conference of IEICE, 2011, 30 Aug. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

Gyrator circuit and its applications for multiband receiver
近藤 亮, 池辺 将之, 本久 順一, IEICE technical report, 111, 151, 125, 130, 21 Jul. 2011
電子情報通信学会, Japanese

Low-power CMOS logic circuits consisting of stack structure
久保 圭史, 池辺 将之, 雨宮 好仁, IEICE technical report, 111, 151, 13, 18, 21 Jul. 2011
電子情報通信学会, Japanese

Gyrator circuit and its applications for multiband receiver
近藤亮, 池辺将之, 本久順一, 雨宮好仁, 佐野栄一, ITE technical report, 35, 28, 125, 130, Jul. 2011
映像情報メディア学会, Japanese

Low-power CMOS logic circuits consisting of stack structure
久保圭史, 池辺将之, 雨宮好仁, 佐野栄一, ITE technical report, 35, 28, 13, 18, Jul. 2011
映像情報メディア学会, Japanese

High quality image synthesis of fast local adaptive tone mapping
Shimoyama Sousuke, Ikebe Masayuki, Igarashi Masaki, Mizuno Akira, Motohisa Junichi, ITE Technical Report, 35, 19, 13, 16, 20 May 2011
Local Histogram Equalization (LHE), which is efficient for High Dynamic Range (HDR) compression, requires a large amount of calculation and induces unnatural image quality. Using checker-wise histogram acquisition and line buffer, memory accessing for local histograms is processed in O(1) time. For improving image quality, we proposed approximation of LHE by compositing gamma functions. Moreover the control of local histogram is developed by introducing mean values of bins for suppression of stripe artifacts arising from small number of bins and halo effect. Using C++, we achieved two million pixels per 0.45sec operation., The Institute of Image Information and Television Engineers, Japanese

C-2-32 Design of Inductorless Low Noise Amplifier for Multi-Standard Wireless Communication System
Kondou Akira, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2011, 1, 28 Feb. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-34 Clock-Period Comparison PLL Consisting of Phase-Shift Direction Detector
Makihara Yukinobu, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2011, 28 Feb. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

D-11-66 FAST IMAGE FILTER DEFINED INDUCTIVELY
Igarashi Masaki, Ikebe Masayuki, Shimoyama Sohsuke, Motohisa Junichi, Proceedings of the IEICE General Conference, 2011, 2, 28 Feb. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

D-11-67 Evaluation of Sophisticated Dynamic Range Compression Method using Composite Function
Shimoyama Sohsuke, Ikebe Masayuki, Igarashi Masaki, Yamano Kenta, Motohisa Junichi, Proceedings of the IEICE General Conference, 2011, 2, 28 Feb. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

D-11-92 "LDR to HDR" Algorithm for Error Diffused Images
Mizuno Akira, Ikebe Masayuki, Motohisa Junichi, Proceedings of the IEICE General Conference, 2011, 2, 28 Feb. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

高ダイナミックレンジ画像合成技術と適応的局所トーンマッピング
池辺将之, 下山荘介, 本久順一, 応用物理学関係連合講演会講演予稿集(CD-ROM), 58th, 2011

Accurate clock period comparison for PLL using phase-shift direction detector
Yukinobu Makihara, Masayuki Ikebe, Junichi Motohisa, Eiichi Sano, IEEJ Transactions on Electronics, Information and Systems, 131, 3, 490, 498, 2011
Institute of Electrical Engineers of Japan, Japanese

High-Speed Ramp-Wave Generator with Interleaved DAC for Single-Slope ADC
MAKIHARA Yukinobu, SHIN Mhun, IKEBE Masayuki, MOTOHISA Junichi, SANO Eiichi, ITE Technical Report, 34, 29, 89, 93, 22 Jul. 2010
We have proposed the method of re-measuring quantizing error of Single-Slope ADC for CMOS imager with TDC (Time-to-Digital Converter). Using n-bits TDC, the proposed ADC performed 2^n time faster operation. This method requires high-speed Ramp wave generation. Therefore, in this paper, we evaluated speed up with interleave operation and output summing of DACs. Although multiple DACs are used, there is no increase of quantization unit devices. In the interleaved DAC with 2^<n-m> of m-bits DACunits, it can perform as a Delta DAC (-2^1≦ΔVout≦2^<m-1>). We designed the current-controlled DAC circuits using 0.25um CMOS process. At 200-MHz-clock operation, we confirmed 800-MHz 12-bit operations with four of 10-bits DACunits., The Institute of Image Information and Television Engineers, Japanese

High-speed ramp-wave generator with interleaved DAC for Single-Slope ADC
牧原幸伸, SHIN Mhun, 池辺将之, 本久順一, 佐野栄一, IEICE technical report, 110, 140, 89, 93, 22 Jul. 2010
電子情報通信学会, Japanese

Center-weighted O(1) Bilateral Filtering
IGARASHI Masaki, IKEBE Masayuki, SHIMOYAMA Sousuke, YAMANO Kenta, MOTOHISA Junichi, ITE Technical Report, 34, 19, 17, 20, 31 May 2010
We propose a O(1) algorithm for bilateral filter using center-weighted spatial filter. We show that a bilateral filter can be converted into weighted histogram operation. Applying line buffers of column histograms, we can reduce the number of calculation needed to construct recursive center-weighted local histogram. We used a 2-GHz CPU with our method and confirmed that processing time is independent of filter radius. Also, we achieved high PSNR over 40dB., The Institute of Image Information and Television Engineers, Japanese

D-11-38 CONSTANT TIME ALGORITHM FOR BILATERAL FILTER
Igarashi Masaki, Ikebe Masayuki, Proceedings of the IEICE General Conference, 2010, 2, 02 Mar. 2010
The Institute of Electronics, Information and Communication Engineers, Japanese

C-2-19 A 3.1-10.6GHz CMOS UWB LNA with Common-Drain feedback
Kondou Akira, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2010, 1, 02 Mar. 2010
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-6 Research of High Gain Antenna on Silicon Substrate with Artificial Dielectric Layer
Takahagi Kazuhiro, Sano Eiichi, Ohno Masaki, Ikebe Masayuki, Proceedings of the IEICE General Conference, 2010, 2, 02 Mar. 2010
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-13 Characteristics Analysis of Single-Slope ADC with TDC
Shin Muung, Ikebe Masayuki, Makihara Yukinobu, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2010, 02 Mar. 2010
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-14 Evaluation of noise influence of frequency characteristics on clock-period comparison PLL
Makihara Yukinobu, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2010, 02 Mar. 2010
The Institute of Electronics, Information and Communication Engineers, Japanese

D-11-39 Evaluation of High Efficiency Local Histogram Equalization Method using Gamma Function
Shimoyama Sohsuke, Ikebe Masayuki, Igarashi Masaki, Yamano Kennta, Motohisa Junichi, Proceedings of the IEICE General Conference, 2010, 2, 02 Mar. 2010
The Institute of Electronics, Information and Communication Engineers, Japanese

Fast 2-D bilateral filtering method without kernel-size dependency
Masaki Igarashi, Masayuki Ikebe, Sousuke Shimoyama, Kenta Yamano, Junichi Motohisa, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 64, 3, 389, 398, Mar. 2010
The Institute of Image Information and Television Engineers, Japanese

熱ナノインプリントを利用したMOVPE選択成長
井上理樹, 佐藤拓也, 池辺将之, 原真二郎, 福井孝志, 本久順一, 応用物理学関係連合講演会講演予稿集(CD-ROM), 57th, 2010

A high-speed local contrast correction method without local pixel-block dependency
Shimoyama Sousuke, Ikebe Masayuki, Igarashi Masaki, Motohisa Junichi, ITE Technical Report, 33, 56, 5, 8, 10 Dec. 2009
Local Histogram Equalization (LHE), which is efficient for High Dynamic Range (HDR) compression, requires a large amount of calculation and induces unnatural image quality. Using checker-wise histogram acquisition and line buffer, memory accessing for local histograms is processed in O(1) time. Moreover, for improving image quality, we proposed approximation of LHE by compositing gamma functions. Setting parameters to each luminance tone, image quality is regulated adaptively. Using C++, we achieved two million pixels per 0.3sec operation and real-time VGA movie processing., The Institute of Image Information and Television Engineers, Japanese

Meta-Stability Characteristic of Single-Slope ADC with Time to Digital Convertor for CMOS-Image Sensor
Shin Mhun, IKEBE Masayuki, MOTOHISA Junichi, SANO Eiichi, ITE Technical Report, 33, 39, 75, 80, 01 Oct. 2009
We have proposed the method of re-measuring quantizing error of Single-Slope ADC for CMOS imager with TDC (Time-to-Digital Converter). Here, we examined adding TDC by D-FF with multi-phase clock, vis-a-vis Delay-line TDC with CMOS inverters. For the operation at 200MHz using 0.25um process, we verified to compensate the process variation of process within 8%, and to operate TDC in DNL: ±0.25LSB, INL: ±0.4LSB by simulation. In addition, utilizing deformation thermo-code, we reduced D-FFs of TDC. For 12bit A/D Converter, when the first stage 9bit ADC and the second stage 3bit TDC are considered, we can design the proposed ADC with only 13 of D-FFs. The linearity of A/D Converter due to the jitter of PLL or DLL and the process variation., The Institute of Image Information and Television Engineers, Japanese

C-12-56 Design of Silicon on Chip Antenna with artificial dielectric layer
Takahagi Kazuhiro, Sano Eiichi, Ikebe Masayuki, Proceedings of the Society Conference of IEICE, 2009, 2, 01 Sep. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-25 Analog to Digital Converter with Multi-Phase Clock for CMOS Imager
Shin Muung, Ikebe Masayuki, Makihara Yukinobu, Motohisa Junichi, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2009, 01 Sep. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

C-2-21 Evaluation of the method of bandwidth-enhancement adapted to the characteristics of On-Chip Antenna for a Low Noise Amplifier
Oono Masaki, Ikebe Masayuki, Motohisa Jyunichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2009, 1, 04 Mar. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

C-2-18 Effect of Quality Factor of Resonant Inductors to the Wide Band Quadrature Mixers
Takada Yusuke, Ikebe Masayuki, Motohisa Jyunichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2009, 1, 04 Mar. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-47 Influence of Phase Noise from Oscillator for Clock-Period comparison PLL
Makihara Yukinobu, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2009, 2, 04 Mar. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

D-11-89 High Speed and High Quality Processing for Local Dynamic-Range-Compression Method
Shimoyama Sohsuke, Igarashi Masaki, Ikebe Masayuki, Motohisa Junichi, Proceedings of the IEICE General Conference, 2009, 2, 04 Mar. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-50 A high resolution Time-to-Digital Converter with State Hold in Delay-Lines
Yamamoto Takurou, Ikebe Masayuki, Motohisa Jyunichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2009, 04 Mar. 2009
The Institute of Electronics, Information and Communication Engineers, Japanese

A fast method for calculating local histograms in image processing: application to histogram equalization and image analysis
Shimoyama Sousuke, Igarashi Masaki, Ikebe masayuki, Journal of signal processing, 13, 2, 151, 159, Mar. 2009
〔信号処理学会〕, English

Meta-Stability Characteristic of Single-Slope ADC with Time to Digital Convertor for CMOS-Image Sensor
SHIN Mhun, 池辺将之, 本久順一, 佐野栄一, 電子情報通信学会技術研究報告, 109, 214(ICD2009 33-62), 2009

熱ナノインプリントを利用した微細加工に関する検討
井上理樹, 佐藤拓也, 池辺将之, 福井孝志, 本久順一, 応用物理学会北海道支部・日本光学会北海道地区合同学術講演会講演予稿集, 44th-5th, 2009

高精度周期比較器を用いたループ特性に依存しないデジタル制御PLLの検討と試作(アナログ,アナデジ混載,RF及びセンサインタフェース回路)
牧原 幸伸, 池辺 将之, 本久 順一, 佐野 栄一, 映像情報メディア学会技術報告, 32, 45, 165, 170, 22 Oct. 2008
本研究では,周期比較方式を用いた位相同期回路(Phase Locked Loop: PLL)の新規アーキテクチャを提案する.周期比較器を導入する事により,ループ・フィルタの特性に依存しない位相ロック動作を確認することができた.通常,周期比較のみでは位相ロック動作は得られない.提案型PLLは厳密な周期の大小比較により,符号の変わる微小な周期差が位相差を制御し位相ロック動作が得られる.提案型PLLを0.25μm CMOSプロセスで回路設計し,その動作をシミュレーションで確認した.回路設計の際導入した,デジタル制御発振器の特性改善も行った.また動作確認のため試作を行い,測定により位相同期を確認した., 一般社団法人映像情報メディア学会, Japanese

高精度周期比較器を用いたループ特性に依存しないデジタル制御PLLの検討と試作(ワイヤレスとワイヤライン,アナログ,アナデジ混載,RF及びセンサインタフェース回路)
牧原 幸伸, 池辺 将之, 本久 順一, 佐野 栄一, 電子情報通信学会技術研究報告. ICD, 集積回路, 108, 253, 165, 170, 15 Oct. 2008
本研究では,周期比較方式を用いた位相同期回路(Phase Locked Loop:PLL)の新規アーキテクチャを提案する.周期比較器を導入する事により,ループ・フィルタの特性に依存しない位相ロック動作を確認することができた.通常,周期比較のみでは位相ロック動作は得られない.提案型PLLは厳密な周期の大小比較により,符号の変わる微小な周期差が位相差を制御し位相ロック動作が得られる.提案型PLLを0.25μm CMOSプロセスで回路設計し,その動作をシミュレーションで確認した.回路設計の際導入した,デジタル制御発振器の特性改善も行った.また動作確認のため試作を行い,測定により位相同期を確認した., 一般社団法人電子情報通信学会, Japanese

C-2-3 Study on the Wide Band Quadrature Mixers for MB-OFDM
Takada Yusuke, Ikebe Masayuki, Motohisa Jyunichi, Sano Eiichi, Proceedings of the Society Conference of IEICE, 2008, 1, 02 Sep. 2008
The Institute of Electronics, Information and Communication Engineers, Japanese

C-2-20 Evaluation of 10.3GHz Quadrature Voltage Controlled Oscillator
Ogase Taichi, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2008, 1, 05 Mar. 2008
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-12 Adoption of Fine Clock Period Comparator for All Digital PLL
Makihara Yukinobu, Ikebe Masayuki, Motohisa Junichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2008, 2, 05 Mar. 2008
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-4 A Time-to-Digital Converter with State Hold in Delay-Lines
Yamamoto Takurou, Ikebe Masayuki, Motohisa Jyunichi, Sano Eiichi, Proceedings of the IEICE General Conference, 2008, 4, 4, 05 Mar. 2008
The Institute of Electronics, Information and Communication Engineers, Japanese

D-11-24 Evaluation of High Speed and High Quality Dynamic-Range-Compression Method Using Local Histogram Equalization
Shimoyama Sohsuke, Igarashi Masaki, Ikebe Masayuki, Motohisa Junichi, Proceedings of the IEICE General Conference, 2008, 2, 05 Mar. 2008
The Institute of Electronics, Information and Communication Engineers, Japanese

Evaluation of spatially adaptive dynamic-range-compression processing (Special issue on nonlinear circuits and signal processing)
Shimoyama Sousuke, Ikebe Masayuki, Igarashi Masaki, Journal of signal processing, 12, 1, 45, 53, Jan. 2008
〔信号処理学会〕, English

Delay-Lineで記憶保持を行うTime-to-Digital Converterの提案
山本拓良, 池辺将之, 本久順一, 佐野栄一, 電子情報通信学会大会講演論文集, 2008, 2008

Using negative feedback in CMOS image sensors to detect intra-frame motion
Masayuki Ikebe, Masaki Igarashit, Junichi Motohisat, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 62, 3, 376, 383, 2008
Inst. of Image Information and Television Engineers, Japanese

Evaluation of a method for extending dynamic-range of a CMOS-image sensor and the behavior control
池辺将之, 櫻谷直史, 五十嵐正樹, 本久順一, ITE technical report, 31, 50, 11, 14, Oct. 2007
映像情報メディア学会, Japanese

C-12-29 Silicon On-Chip Antenna for Microwave Band
Ueo Daisuke, Ikebe Masayuki, Sano Eiichi, Koutani Masato, Ikeda Masayuki, Mashiko Koichiro, Proceedings of the Society Conference of IEICE, 2007, 2, 29 Aug. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese

広ダイナミックレンジ画像圧縮手法の検討--輝度値の連続性・空間変化を考慮した広ダイナミックレンジの圧縮
池辺 将之, 斉藤 啓太, 下山 荘介, 画像ラボ, 18, 8, 37, 40, Aug. 2007
日本工業出版, Japanese

Motion Detection by CMOS-Image Sensor with Negative feedback Resetting
IKEBE Masayuki, SAKURAYA Naofumi, Technical report of IEICE. ICD, 107, 163, 177, 182, 19 Jul. 2007
We have investigated a excellent method to extend the dynamic range of a CMOS image sensor and product trial sensor array. The sensor has two marked features. First, it effectively takes advantage of negative feedback method to set any mid-voltage into a PD-capacitance a pixel circuit while in motion. Second, we implemented programmable sequencer to control various line processing. Using above features, we realized duplicated interlace processing and outputting image for differential frame without frame buffers. By differential output and post processing, we confirmed motion detection in proposed image sensor., The Institute of Electronics, Information and Communication Engineers, Japanese

Motion detection by CMOS-image sensor with negative feedback resetting
池辺 将之, 櫻谷 直史, ITE technical report, 31, 34, 177, 182, Jul. 2007
映像情報メディア学会, Japanese

Evaluation of Digitally Controlled PLL by Clock-Period Comparison
MAKIHARA Yukinobu, IKEBE Masayuki, SANO Eiichi, IEICE Transactions on Electronics, C, 90, 6, 1307, 1310, 01 Jun. 2007
For a digitally controlled phase-locked loop (PLL), we evaluate the use of a clock-period comparator (CPC). In this PLL, only the frequency lock operation should be performed; however, the phase lock operation is also simultaneously achieved by performing the clock-period comparison when the phases of the reference signal and the output signal approach each other. Theoretically a lock-up operation was conducted. In addition, we succeeded in digitizing a voltage controlled oscillator (VCO) with a linear characteristic. We confirmed a phase lock operation with a slight loop characteristic through SPICE simulation., The Institute of Electronics, Information and Communication Engineers, English

C-2-1 Trial Manufacture of Switched Symmetric Variable Inductor by using MOSFET
Ogase Taichi, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2007, 1, 07 Mar. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-16 Evaluation of Common mode noise by using Quasi-differential LNA
Oono Masaki, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2007, 07 Mar. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese

C-2-35 Inverted-F Antenna Monolithically Integrated with CMOS LNA
Ueo Daisuke, Osabe Hiroshi, Inafune Koji, Ikebe Masayuki, Sano Eiichi, Koutani Masato, Ikeda Masayuki, Mashiko Koichiro, Proceedings of the IEICE General Conference, 2007, 1, 07 Mar. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-40 Linear Characteristic Digital Controlled Oscillator for Digital Controlled PLL
Makihara Yukinobu, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2007, 07 Mar. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese

仮想粘菌セルオートマトンによる迷路探索手法の提案
北内悠介, 池辺将之, 電子情報通信学会大会講演論文集, 2007, 2007

Evaluation of continuous- and spatial-correction for high-dynamic-range compression
Keita Saito, Sousuke Shimoyama, Masayuki Ikebe, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 61, 3, 325, 331, 2007
Inst. of Image Information and Television Engineers, Japanese

Digital Controlled PLL by Using Clock-Period Comparator
MAKIHARA Yukinobu, IKEBE Masayuki, SANO Eiichi, The transactions of the Institute of Electronics, Information and Communication Engineers. C, 89, 10, 666, 668, 01 Oct. 2006
ディジタル制御PLLに対して,周期比較器(CPC: Clock-Period Comparator)の適用を検討した.閉ループ特性が周波数ドメインで一次の極をもち,リプルがない状態で周波数のロックが起こる.同時に,位相ロックも生じることをシミュレーションにより確認した., The Institute of Electronics, Information and Communication Engineers, Japanese

HDR-Compression-CMOS-Image Sensor with Negative feedback Resetting
IKEBE Masayuki, SAKURAYA Naofumi, ITE technical report, 30, 38, 91, 96, 27 Jul. 2006
映像情報メディア学会, Japanese

HDR-Compression-CMOS-Image Sensor with Negative feedback Resetting
IKEBE Masayuki, SAKURAYA Naofumi, Technical report of IEICE. ICD, 106, 189, 91, 96, 20 Jul. 2006
We have investigated a excellent method to extend the dynamic range of a CMOS image sensor and product trial sensor array. The resolution of the sensor is QVGA. The sensor has two marked features. First, it effectively takes advantage of negative feedback method to set any mid-voltage into a PD-capacitance a pixel circuit while in motion. Second, we implemented quasi-holding each pixel value by resetting the pixel-output voltage to the PD-capacitance. We offer an extending dynamic-range of a CMOS image sensor with a help of an individual selecting the setting mid-voltage or the quasi holding for the each pixel. We can drastically reduce external memories that are need for our previous method. The trial chip was fabricated TSMC 0.25μm CMOS technology. Pixel size is 5um x 5um and fillfactor is 40%., The Institute of Electronics, Information and Communication Engineers, Japanese

A-4-7 Dynamic Range Compression with YCbCr-Style
Saito Keita, Ikebe Masayuki, Proceedings of the IEICE General Conference, 2006, 08 Mar. 2006
The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-21 Evaluation of Switched Symmetric Variable Inductor by using MOSFET
Ogase Taichi, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2006, 2, 08 Mar. 2006
The Institute of Electronics, Information and Communication Engineers, Japanese

A-1-7 Evaluation of Digital Controlled PLL by using Wave Length Comparator
Makihara Yukinobu, Ikebe Masayuki, Sano Eiichi, Proceedings of the IEICE General Conference, 2006, 08 Mar. 2006
The Institute of Electronics, Information and Communication Engineers, Japanese

CMOS-image sensor with PD-capacitance modulation using negative feedback resetting
Masayuki Ikebe, Keita Saito, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 60, 3, 384, 389, Mar. 2006
The Institute of Image Information and Television Engineers, Japanese

シリコン上逆Fアンテナの設計
植尾大輔, 稲船浩司, 池辺将之, 佐野栄一, 電気・情報関係学会北海道支部連合大会講演論文集(CD-ROM), 2006, 2006

右手/左手複合伝送線路を用いた分布アンプの設計
田村健史, 池辺将之, 佐野栄一, 電気・情報関係学会北海道支部連合大会講演論文集(CD-ROM), 2006, 2006

Evaluation of a combination of Negative Feedback Resetting and CDS for a CMOS-Image Sensor
IKEBE Masayuki, SAITO Keita, ITE technical report, 29, 61, 13, 16, 27 Oct. 2005
映像情報メディア学会, Japanese

A-4-40 Dynamic range Enhancement with HSV-Style
Saito Keita, Ikebe Masayuki, Proceedings of the Society Conference of IEICE, 2005, 07 Sep. 2005
The Institute of Electronics, Information and Communication Engineers, Japanese

Controlling PD-Capacitance of CMOS-Image Sensor using Negative feedback Resetting
IKEBE Masayuki, IDUNOME Mariko, SEKIGUCHI Takeshi, UMEKAI Katsuhiro, OOSAWA Isaku, OOSUMI Yuji, Technical report of IEICE. ICD, 105, 185, 57, 62, 08 Jul. 2005
We have investigated a excellent method to extend the dynamic range of a CMOS image sensor and product basic circuits trialy. The system has two marked features. First, the system effectively takes advantage of negative feedback method to set any mid-voltage into a PD-capacitance a pixel circuit while in motion. Second, we implemented quasi-holding each pixel value by resetting the pixel-output voltage to the PD-capacitance. We offer an extending dynamic-range of a CMOS image sensor with a help of an individual selecting the setting mid-voltage or the quasi holding for the each pixel. We can drastically reduce external memory that are need for our previous method. The trial circuit was fabricated TSMC 0.25μm CMOS technology. By measurements, we confirmed that the circuit worked properly., The Institute of Electronics, Information and Communication Engineers, Japanese

負帰還を用いたCMOSイメージセンサの蓄積容量制御
池辺 将之, 泉妻 まり子, 関口 毅, 映像情報メディア学会技術報告, 29, 41, 57, 62, Jul. 2005
映像情報メディア学会, Japanese

C-12-39 Evaluation of a Method for Low Noise and Low Amplitude I/F of a CMOS-Image Sensor
IKEBE Masayuki, UMEKAI Katsuhiro, OOSUMI Yuji, Proceedings of the IEICE General Conference, 2005, 2, 07 Mar. 2005
The Institute of Electronics, Information and Communication Engineers, Japanese

Ultra Widebandの使用目的に応じた変調方式の検討 (移動通信ワークショップ)
田辺 茂輝, 杉浦 彰彦, 池辺 将之, 電子情報通信学会技術研究報告, 104, 684, 219, 224, 02 Mar. 2005
電子情報通信学会, Japanese

Ultra Wideband の使用目的に応じた変調方式の検討
田辺 茂輝, 杉浦 彰彦, 池辺 将之, 電子情報通信学会技術研究報告. MoMuC, モバイルマルチメディア通信, 104, 681, 219, 224, 23 Feb. 2005
Japanese

Ultra Wideband の使用目的に応じた変調方式の検討
田辺 茂輝, 杉浦 彰彦, 池辺 将之, 電子情報通信学会技術研究報告. MW, マイクロ波, 104, 684, 219, 224, 23 Feb. 2005
Japanese

Ultra Wideband の使用目的に応じた変調方式の検討
田辺 茂輝, 杉浦 彰彦, 池辺 将之, 電子情報通信学会技術研究報告. A・P, アンテナ・伝播, 104, 675, 219, 224, 23 Feb. 2005
電子情報通信学会, Japanese

Ultra Wideband の使用目的に応じた変調方式の検討
田辺 茂輝, 杉浦 彰彦, 池辺 将之, 電子情報通信学会技術研究報告. RCS, 無線通信システム, 104, 678, 219, 224, 23 Feb. 2005
Japanese

A Method of Ultra Wideband Modulation According to its Purpose of Use
TANABE Shigeki, SUGIURA Akihiko, IKEBE Masayuki, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム : IEICE technical report, 104, 672, 219, 224, 23 Feb. 2005
Japanese

A Method of Ultra Wideband Modulation According to its Purpose of Use
TANABE Shigeki, SUGIURA Akihiko, IKEBE Masayuki, IEICE technical report, 104, 681, 219, 224, 23 Feb. 2005
Rapid wireless communication is increasingly demanded. Anticipated as a technology that allows high-speed, wireless communication is ultra-wide band (UWB). Two or more modulation methods are proposed for UWB now. Clarification of respective characteristics has become an important obstacle for practical use in the future. Moreover, artificial vision is rated as an example of applying UWB. The developed artificial vision is of the cable type : a wireless type is not envisioned now. However, artificial vision is inferred to require wireless operation for convenience. This study clarifies the desirability of use of MATLAB/Simulink, and of suitable modulation methods for artificial vision by UWB. Moreover, this study is intended to show the effectiveness of a wireless transmission type artificial vision system using UWB., The Institute of Electronics, Information and Communication Engineers, Japanese

A Method of Ultra Wideband Modulation According to its Purpose of Use
TANABE Shigeki, SUGIURA Akihiko, IKEBE Masayuki, IEICE technical report. WBS, Wideband System, 104, 672, 219, 224, 23 Feb. 2005
Rapid wireless communication is increasingly demanded. Anticipated as a technology that allows high-speed, wireless communication is ultra-wide band (UWB). Two or more modulation methods are proposed for UWB now. Clarification of respective characteristics has become an important obstacle for practical use in the future. Moreover, artificial vision is rated as an example of applying UWB. The developed artificial vision is of the cable type : a wireless type is not envisioned now. However, artificial vision is inferred to require wireless operation for convenience. This study clarifies the desirability of use of MATLAB/Simulink, and of suitable modulation methods for artificial vision by UWB. Moreover, this study is intended to show the effectiveness of a wireless transmission type artificial vision system using UWB., The Institute of Electronics, Information and Communication Engineers, Japanese

A Method of Ultra Wideband Modulation According to its Purpose of Use
TANABE Shigeki, SUGIURA Akihiko, IKEBE Masayuki, IEICE technical report. Microwaves, 104, 684, 219, 224, 23 Feb. 2005
Rapid wireless communication is increasingly demanded. Anticipated as a technology that allows high-speed, wireless communication is ultra-wide band (UWB). Two or more modulation methods are proposed for UWB now. Clarification of respective characteristics has become an important obstacle for practical use in the future. Moreover, artificial vision is rated as an example of applying UWB. The developed artificial vision is of the cable type : a wireless type is not envisioned now. However, artificial vision is inferred to require wireless operation for convenience. This study clarifies the desirability of use of MATLAB/Simulink, and of suitable modulation methods for artificial vision by UWB. Moreover, this study is intended to show the effectiveness of a wireless transmission type artificial vision system using UWB., The Institute of Electronics, Information and Communication Engineers, Japanese

A Method of Ultra Wideband Modulation According to its Purpose of Use
TANABE Shigeki, SUGIURA Akihiko, IKEBE Masayuki, IEICE technical report. Antennas and propagation, 104, 675, 219, 224, 23 Feb. 2005
Rapid wireless communication is increasingly demanded. Anticipated as a technology that allows high-speed, wireless communication is ultra-wide band (UWB). Two or more modulation methods are proposed for UWB now. Clarification of respective characteristics has become an important obstacle for practical use in the future. Moreover, artificial vision is rated as an example of applying UWB. The developed artificial vision is of the cable type : a wireless type is not envisioned now. However, artificial vision is inferred to require wireless operation for convenience. This study clarifies the desirability of use of MATLAB/Simulink, and of suitable modulation methods for artificial vision by UWB. Moreover, this study is intended to show the effectiveness of a wireless transmission type artificial vision system using UWB., The Institute of Electronics, Information and Communication Engineers, Japanese

A Method of Ultra Wideband Modulation According to its Purpose of Use
TANABE Shigeki, SUGIURA Akihiko, IKEBE Masayuki, Technical report of IEICE. RCS, 104, 678, 219, 224, 23 Feb. 2005
Rapid wireless communication is increasingly demanded. Anticipated as a technology that allows high-speed, wireless communication is ultra-wide band (UWB). Two or more modulation methods are proposed for UWB now. Clarification of respective characteristics has become an important obstacle for practical use in the future. Moreover, artificial vision is rated as an example of applying UWB. The developed artificial vision is of the cable type : a wireless type is not envisioned now. However, artificial vision is inferred to require wireless operation for convenience. This study clarifies the desirability of use of MATLAB/Simulink, and of suitable modulation methods for artificial vision by UWB. Moreover, this study is intended to show the effectiveness of a wireless transmission type artificial vision system using UWB., The Institute of Electronics, Information and Communication Engineers, Japanese

On-chip fixed-pattern-noise canceling by negative-feedback reset for CMOS image sensors
Ryo Kagaya, Masayuki Ikebe, Tetsuya Asai, Yoshihito Amemiya, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 59, 3, 415, 421, 2005
Inst. of Image Information and Television Engineers, Japanese

Evaluation of a Method for Extending Dynamic-Range of a CMOS-Image Sensor and the Behavior Control
IKEBE Masayuki, KAGAYA Ryo, HIGUCHI Takuya, UMEKAI Katsuhiro, OSAWA Isaku, OSUMI Yuji, ITE technical report, 28, 58, 5, 8, 14 Oct. 2004
映像情報メディア学会, Japanese

Evaluation of a Method for Extending Dynamic-Range of a CMOS-Image Sensor
IKEBE Masayuki, OOSUMI Yuji, NISHIGAKI Yoshihiro, KANETAKA Tatsuya, ITE technical report, 28, 37, 47, 52, 13 Jul. 2004
映像情報メディア学会, Japanese

Evaluation of a Method for Extending Dynamic-Range of a CMOS-Image Sensor
IKEBE Masayuki, OOSUMI Yuji, NISHIGAKI Yoshihiro, KANETAKA Tatsuya, Technical report of IEICE. ICD, 104, 174, 47, 52, 06 Jul. 2004
We have investigated a excellent method to extend the dynamic range of a CMOS image sensor. The system has two marked features. First, the system effectively takes advantage of negative feedback method to set any mid-voltage into a PD- or FD-capacitance a pixel circuit while in motion. Second, we implemented quasi-holding each pixel value by resetting the pixel-output voltage to the PD- or FD-capacitance. We offer an extending dynamic-range of a CMOS image sensor with a help of an individual selecting the setting mid-voltage or the quasi holding for the each pixel. The output data has a characteristic of a polygonal line that is changing from high sensitivity to low sensitivity in brightness getting stronger, and can be output without modification. We can drastically reduce external memory as flags that are need for our previous method., The Institute of Electronics, Information and Communication Engineers, Japanese

C-12-21 CMOS image-sensor circuitry for compensating fixed pattern noise
Kagaya Ryo, Ikebe Masayuki, Asai Tetsuya, Amemiya Yoshihito, Oosumi Yuji, Kanetaka Tatsuya, Proceedings of the IEICE General Conference, 2004, 2, 08 Mar. 2004
The Institute of Electronics, Information and Communication Engineers, Japanese

CMOSイメージセンサに適した広ダイナミックレンジ化の検討
池辺将之, 大住勇治, 西垣嘉博, 金高達也, 電子情報通信学会大会講演論文集, 2004, 2004

Evaluation of a Functional Initializing for a CMOS-Image Sensor
IKEBE Masayuki, OOSUMI Yuji, KANETAKA Tatsuya, ASAI Tetsuya, AMEMIYA Yoshihito, ITE technical report, 27, 48, 19, 24, 11 Sep. 2003
映像情報メディア学会, Japanese

Evaluation of a Functional Initializing for a CMOS-Image Sensor
IKEBE Masayuki, OOSUMI Yuji, KANETAKA Tatsuya, ASAI Tetsuya, AMEMIYA Yoshihito, Technical report of IEICE. ICD, 103, 298, 19, 24, 04 Sep. 2003
We have investigated a new initializing method to widen the dynamic range of CMOS image sensor circuit. At first, we present that the variation of threshold voltage of output MOSFET can be canceled by using negative feedback to initialize. Secondly, we achieved the wide dynamic range by setting individual initializing timing based upon estimation and normalization of the saturating time of each pixel. As the result 12dB dynamic range gain is achieved at each saturation-time-estimation. And also the statistical data of brightness is easily calculated by using the recorded saturation time information of each pixel. Image processing which is to convert the original digit number to a certain number can be properly determined by using the recorded statistical, The Institute of Electronics, Information and Communication Engineers, Japanese

A υMOS Vision Chip Based on the Cellular-Automaton Processing
SUNAYAMA Tatsuhiko, ASAI Tetsuya, AMEMIYA Yoshihito, IKEBE Masayuki, Extended abstracts of the ... Conference on Solid State Devices and Materials, 2000, 364, 365, 28 Aug. 2000
English

Motion Detection by νMOS Picture Processing Systems
Sunayama Tatuhiko, Ikebe Masayuki, Asai Tetuya, Amemiya Yoshihito, Proceedings of the IEICE General Conference, 2000, 2, 07 Mar. 2000
The Institute of Electronics, Information and Communication Engineers, Japanese

A νMOS Cellular-Automaton Device for Differential-of-Gaussian Filtering
SUNAYAMA Tatsuhiko, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1999, 2, 104, 104, 16 Aug. 1999
The Institute of Electronics, Information and Communication Engineers, Japanese

A ν MOS cellular-Automaton Circuit for Morphological Processing
SUNAYAMA Tatsuhiko, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the IEICE General Conference, 1999, 2, 08 Mar. 1999
The Institute of Electronics, Information and Communication Engineers, Japanese

Low-power Construction of νMOS Cellular Automaton Circuits
IKEBE Masayuki, Wong Zhee Shiong, AMEMIYA Yoshihito, HONMA Kunihiko, Proceedings of the IEICE General Conference, 1999, 2, 08 Mar. 1999
The Institute of Electronics, Information and Communication Engineers, Japanese

A Cellular Automaton Devices Using Current-Mode nMOS Circuits
YAMADA Takashi, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the IEICE General Conference, 1999, 2, 08 Mar. 1999
The Institute of Electronics, Information and Communication Engineers, Japanese

Low-Power Cellular Automaton Devices Using νMOS Differential Circuits
WONG Zhee Shiong, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the IEICE General Conference, 1999, 2, 08 Mar. 1999
The Institute of Electronics, Information and Communication Engineers, Japanese

Differential-of-Gaussian処理を行うνMOSセルオートマトン回路
砂山辰彦, 池辺将之, 雨宮好仁, 電子情報通信学会大会講演論文集, 1999, 1999

Chaotic Cryptosystem Using νMOS Cellular Automata
IKEBE Masayuki, AMEMIYA Yoshihito, WU Nan-Jian, Proceedings of the Society Conference of IEICE, 1998, 2, 07 Sep. 1998
The Institute of Electronics, Information and Communication Engineers, Japanese

Low-Power νMOS Threshold Logic Circuits
WONG Zhee Shiong, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1998, 2, 07 Sep. 1998
The Institute of Electronics, Information and Communication Engineers, Japanese

Chaotic Cryptosystem Utilizing νMOS Cellular Automata
IKEBE Masayuki, Wu Nan-Jian, AMEMIYA Yoshihito, Proceedings of the IEICE General Conference, 1998, 2, 06 Mar. 1998
The Institute of Electronics, Information and Communication Engineers, Japanese

Single-Electron Cellular Automaton Circuit for Image Processing
HONMA Kunihiko, IKEBE Masayuki, ASAHI Noboru, AMEMIYA Yoshihito, IEICE technical report. Electron devices, 97, 271, 51, 56, 26 Sep. 1997
This paper proposes a cellular-automaton circuit using single-electron circuits. The functions required for constructing cellular automata can be produced from single-electron circuits by use of a simple circuit construction. We design first a multi-input threshold logic circuit and a latch circuit, and then combind them to construct a unit cell circuit for single-electron cellular automata. The operation of the designed cell circuit is analized by computer simulation to show that the required cell function can be obtained correctly., The Institute of Electronics, Information and Communication Engineers, Japanese

Single-Electron Cellular Automaton Circuit for Image Processing
HONMA Kunihiko, IKEBE Masayuki, ASAHI Noboru, AMEMIYA Yoshihito, Technical report of IEICE. VLD, 97, 269, 51, 56, 26 Sep. 1997
This paper proposes a cellular-automaton circuit using single-electron circuits. The functions required for constructing cellular automata can be produced from single-electron circuits by use of a simple circuit construction. We design first a multi-input threshold logic circuit and a latch circuit, and then combind them to construct a unit cell circuit for single-electron cellular automata. The operation of the designed cell circuit is analized by computer simulation to show that the required cell function can be obtained correctly., The Institute of Electronics, Information and Communication Engineers, Japanese

Single-Electron Cellular Automaton Circuit for Image Processing
HONMA Kunihiko, IKEBE Masayuki, ASAHI Noboru, AMEMIYA Yoshihito, Technical report of IEICE. SDM, 97, 273, 51, 56, 26 Sep. 1997
This paper proposes a cellular-automaton circuit using single-electron circuits. The functions required for constructing cellular automata can be produced from single-electron circuits by use of a simple circuit construction. We design first a multi-input threshold logic circuit and a latch circuit, and then combind them to construct a unit cell circuit for single-electron cellular automata. The operation of the designed cell circuit is analized by computer simulation to show that the required cell function can be obtained correctly., The Institute of Electronics, Information and Communication Engineers, Japanese

Single-Electron Cellular Automaton Circuit for Image Processing
HONMA Kunihiko, IKEBE Masayuki, ASAHI Noboru, AMEMIYA Yoshihito, Technical report of IEICE. ICD, 97, 275, 51, 56, 26 Sep. 1997
This paper proposes a cellular-automaton circuit using single-electron circuits. The functions required for constructing cellular automata can be produced from single-electron circuits by use of a simple circuit construction. We design first a multi-input threshold logic circuit and a latch circuit, and then combind them to construct a unit cell circuit for single-electron cellular automata. The operation of the designed cell circuit is analized by computer simulation to show that the required cell function can be obtained correctly., The Institute of Electronics, Information and Communication Engineers, Japanese

Neuron Circuit using the Single-Electron Step Inverter
OHUCHI Takahiro, IKEBE Masayuki, ASAHI Noboru, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1997, 2, 13 Aug. 1997
単電子回路を用いると、CMOS回路では実現困難な<ステップインバータ>___-を構成することができる。これはステッブ形状の伝達特性をもつインバータであって、どのような入力電圧のもとでも(CMOSと異なり)貫通電流が流れることがない。したがって、入力が0と1の中間値をとるような回路(しきい論理・多値論理・ニューラルネットワーク等の回路)を低消費電力に構成することができる。以下では、ステップインバータを用いたニューロン回路について述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Cellular-Automaton Circuit using Single-Electron Transistors
HONMA Kunihiko, IKEBE Masayuki, ASAHI Noboru, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1997, 2, 133, 133, 13 Aug. 1997
セルオートマトンは並列分散形の情報処理システムの一種であり、高速画像処理に適している。先に我々は、シングルホトン画像処理LSIを目標として、単電子を利用したセルオートマトン回路を提案した。今回は、よりコンパクトで簡単なセル構成を得るための回路要素として、新たに単電子メモリ回路を設計した。このメモリ回路を用いてセルオートマトン回路を構成し、その動作をシミュレーション確認した。以下にその詳細を述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Low-power Construction of νMOS Cellular Automata
IKEBE Masayuki, Honma Kunihiko, Akazawa Masamichi, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1997, 2, 13 Aug. 1997
νMOSインバータは、多入力しきい論理に適したデバイスである。これを用いると画像処理用セルオートマトン回路をコンパクトに構成できる。しかし、しきい論理回路ではνMOSをオンとオフの中間状態で使うことが多く、そのため貫通電流を生じて消費電力が大きくなりやすい。 ここではνMOS回路の低電力設計を考える。雑音除去・輪郭抽出セルオートマトン回路を例にとり、ダイナミック形と高しきい値MOS形の2つの構成法によって低電力設計行った。以下にその詳細を示す。, The Institute of Electronics, Information and Communication Engineers, Japanese

υMOS Cellular-Automaton Circuit for Picture Thinning and Shrinking
IKEBE Masayuki, KAMEISHI Koji, AMEMIYA Yoshihito, The Transactions of the Institute of Electrical Engineers of Japan. C, 117, 5, 548, 553, May 1997
電気学会, Japanese

Template Matching Utilizing νMOS Cellular Automata
IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the IEICE General Conference, 1997, 2, 06 Mar. 1997
セルオートマトンは高速画像処理に適した並列演算形の処理システムである。ここでは, 8近傍の任意テンプレートによって2値画像処理を行うセルオートマトン回路の設計を試みた。以下に結果を述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Neural networks constructed from single electron circuits
OHUCHI Takahiro, IKEBE Masayuki, Amemiya Yoshihito, Proceedings of the IEICE General Conference, 1997, 2, 06 Mar. 1997
単電子トランジスタ(SET)電子回路の研究が盛んとなってきた。ここでは単電子回路を用いたニューラルネットワークの構成について報告する。簡単な例として, 排他的論理和(XOR)の動作を行うニューラルネットワーク回路を設計し, その動作をシミュレーション確認した。, The Institute of Electronics, Information and Communication Engineers, Japanese

Cellular-Automaton Circuit using Single Electron Transistors
HONMA Kunihiko, IKEBE Masayuki, Amemiya Yoshihito, Proceedings of the IEICE General Conference, 1997, 2, 06 Mar. 1997
セルオートマトンは並列分散形の情報処理システムの一種であり, 画像処理応用に適している。本研究では, シングルホトン画像処理LSIを目標として, 単電子を用いたセルオートマトン回路を設計した。その回路構成と動作シミュレーション結果を以下に述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

A functional νMOS circuit for implementing cellular-automaton picture-processing devices
IKEBE M., Computers Elect. Engng, 23, 6, 439, 451, 1997

Accuracy of the νMOS Majority-Decision Gate Circuit
IKEBE Masayuki, AMEMIYA Yoshihito, ASANO Takuma, Technical report of IEICE. ICD, 96, 267, 79, 84, 27 Sep. 1996
We designed a Majority-Decision Gate circuit consisting of νMOS FETs. The operation of the circuit is badly influenced by mismatch in the MOS threshold voltages. To solve this problem, we proposed a compasation cicuit that can compensate the effect of theshold mismatch. We simulated the operation of the Majorty-Decision Gate cicuit having the compasation circuit, and confirmed that the circuit can operate correctly under large mismatch in the MOS threshold voltages., The Institute of Electronics, Information and Communication Engineers, Japanese

Accuracy of the νMOS Majority-Decision Gircuit
IKEBE Masayuki, AMEMIYA Yoshihito, ASANO Takuma, Proceedings of the Society Conference of IEICE, 1996, 2, 18 Sep. 1996
νMOSを用いると、多入力の多数決論理回路を少数のデバイスで簡単に構成することができる。その場合の問題点は、MOSデバイスしきい値の製造バラツキにより論理しきい値が変動することである。これを解決するための補正付き多数決回路を先に提案した。以下では、この回路の補正効果と動作歩留まりを調べるため、実際の素子バラツキデータをもとにシミュレーション解析を行った。, The Institute of Electronics, Information and Communication Engineers, Japanese

Lower-power νMOS Logic Circuit
HONMA Kunihiko, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1996, 2, 18 Sep. 1996
νMOSインバータは多入力しきい論理に適したデバイスである。これを用いて種々の機能回路をコンパクト(少ない素子、小面積)に構成できる。しかしνMOSインバータはオンとオフの中間状態で使われることが多く、そのため貫通電流を生じて消費電力が大きくなりやすい。この点を解決するため、MOSトランジスタのしきい値を大きくとった低電力νMOSインバータを構成した。また、それを用いて画像処理用セルオートマトン回路を設計した。以下においてその動作特性を解析し、大幅な消費電力の低減が可能なことを示す。, The Institute of Electronics, Information and Communication Engineers, Japanese

νMOS Cellular-Automaton Circuit for Thinning and Shrinking
Ikebe Masayuki, Amemiya Yoshihito, Proceedings of the IEICE General Conference, 1996, 2, 11 Mar. 1996
セルオートマトンは高速画像処理に適した非ブール代数形の処理システムである。我々は、シリコン機能デバイスのνMOSを用いてこれをコンパクトに回路化する方法を提案し、同時にいくつかの画像処理動作が可能なことを示した[1][2]。ここでは細線化と縮退をあわせて行うセルオートマトン回路の設計を試みた。以下に結果を述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Accuracy of the Majority-Decision Gate Circuit.
池辺将之, 雨宮好仁, 浅野琢磨, 電気関係学会北海道支部連合大会講演論文集, 1996, 1996

Lower-power .NU.MOS Logic Circuit.
本間久仁彦, 池辺将之, 雨宮好仁, 電気関係学会北海道支部連合大会講演論文集, 1996, 1996

Single-Electron Threshold-Logic Circuits for Celluer Automata.
池辺将之, 雨宮好仁, 応用物理学会学術講演会講演予稿集, 57th, 1, 1996

νMOS Majyority-Decision Gate with Great Many Inputs
IKEBE Masayuki, ASANO Takuma, KAMEISHI Koji, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1995, 2, 05 Sep. 1995
νMOSを用いると、多数決論理回路を少数のデバイスで簡単に構成することができる。その場合の問題点は、MOSデバイスしきい値の製造バラツキにより論理しきい値が変動することである。これは、入力数が多いとき特に問題となる。ここではしきい値バラツキを補正する回路を提案して多数決論理回路を設計した。シミュレーションにより、100以上の多入力でも動作し得ることを示した。以下にその詳細を述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Image-Signal Input Circuit for Cellular-Automata using Photo Diodes
KAMEISHI Koji, IKEBE Masayuki, AMEMIYA Yoshihito, Proceedings of the Society Conference of IEICE, 1995, 2, 05 Sep. 1995
非ブール代数の情報処理システムであるセルオートマトンは、種々の画像処理に応用可能である。我々は先にいくつかのセルオートマトン回路をシリコン機能デバイスのνMOSによって構成した。ここではそのセルオートマトンに、外界からの画像情報を光によって取り入れるための入力部の回路を提案する。, The Institute of Electronics, Information and Communication Engineers, Japanese

Circuit constraction for Thinning using ν MOS Cellular Automata
Ikebe Masayuki, Kameishi Koji, Amemiya Yoshihito, IEICE technical report. Computer systems, 95, 20, 65, 70, 27 Apr. 1995
We proposed a cellular-automaton circuit that can perform picture thinning by template matching. We designed the circuit compactly by using ν MOS FETs and analyzed its operation using a circuit simulater. A high-speed operation up to 150-MHz clock frequency was obtained., The Institute of Electronics, Information and Communication Engineers, Japanese

Outline Extraction Utilizing νMOS Cellular Automata
IKEBE Masayuki, KAMEISHI Koji, AMEMIYA Yoshihito, Proceedings of the IEICE General Conference, 1995, 2, 27 Mar. 1995
最近、非ブール代数形の情報処理システムが注目されている。セルオートマトンはその一種であり、画像処理や物理現象モデリングへの応用が期待できる。我々は、先にシリコン機能デバイスのνMOSを用いてセルオートマトン回路をコンパクトに構成する方法を提案し、同時にいくつかの画像処理動作が可能なことを示した。ここでは、4 近傍ルールの輪郭抽出を行うセルオートマン回路の設計を試みた。以下に結果を述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Circuit constraction for Thinning using .NU.MOS Cellular Automata.
池辺将之, 亀石浩司, 雨宮好仁, 電子情報通信学会技術研究報告, 95, 20(CPSY95 1-10), 1995

.NU.MOS Majority-Decision Gate with Great Many Inputs.
池辺将之, 浅野琢磨, 亀石浩司, 雨宮好仁, 電気関係学会北海道支部連合大会講演論文集, 1995, 1995

Circuit construction for Thinning using .NU.MOS Cellular Automata.
池辺将之, 亀石浩司, 雨宮好仁, 電子情報通信学会技術研究報告, 95, 22(FTS95 1-10), 1995

Simulation of Cellular Automata with Image-Signal Input Circuit.
亀石浩司, 池辺将之, 雨宮好仁, 電気関係学会北海道支部連合大会講演論文集, 1995, 1995

Randam Sequence Generation by νMOS Cellular Automata
KAMEISHI Koji, IKEBE Masayuki, AMEMIYA Yoshihito, 電子情報通信学会大会講演論文集, 1994, 2, 26 Sep. 1994
最近、非プール代数形の情報処理システムが注目されている。セルオートマトンはその一種であり、画像処理や物理現象モデリングに応用が考えられる。我々は、先にシリコン機能デバイスのνMOSを用いてセルオートマトン回路をコンパクトに構成する方法を提案し、同時にいくつかの画像処理動作が可能なことを示した。ここでは、νMOSセルオートマトン回路の別例として、乱数発生用セルオートマトンの設計を試みた。以下に結果を述べる。, The Institute of Electronics, Information and Communication Engineers, Japanese

Development of nanowire hybrid integrated devices
Grants-in-Aid for Scientific Research
01 Apr. 2022 - 31 Mar. 2026
冨岡 克広, 池辺 将之, 本久 順一
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 22H00202

関節リウマチ破壊性変化定量解析システムの妥当性評価
科学研究費助成事業 基盤研究(C)
01 Apr. 2021 - 31 Mar. 2024
神島 保, 池田 啓, 渥美 達也, 池辺 将之, 田村 賢一
Genant-modified Sharpスコア（GSS）などの、関節リウマチ（RA）における関節腔狭小化（JSN）のX線スコアリング法は広く受け入れられているが、評価が主観的で煩雑である。そのため、関節裂隙幅（JSW）の変化を自動的に定量化できる部分位相限定相関（PIPOC）を備えたソフトウェアを開発した。本研究の目的は、ソフトウェアを用いてトシリズマブ治療下の関節リウマチ患者のJSN進行を検討することである。
トシリズマブで治療された39名のRA患者（女性35名）を対象とした。中手指節関節および近位指節間関節のＸ線学的進行は、0ヶ月および12ヶ月のGSSに従って評価された。
被験者の均質性を確保するために、ソフトウェア分析のベースラインでGSS = 0の関節をターゲットにした。 JSN進行測定用の社内ソフトウェアの成功率は96.8％（449/464）であった。ソフトウェアで1年間に定量化された手指関節のJSW変化は、GSS進行陽性群の方が陰性群よりも有意に大きかった（p = 0.02）。
PIPOC依存ソフトウェアは、1年間のトシリズマブ治療下の追跡期間中にRA患者のJSN進行を検出できる可能性がある。
日本学術振興会, 基盤研究(C), 北海道大学, 21K07611

Innovative Self-Learnable Architecture Platform for Accelerating Intelligent Computing
Grants-in-Aid for Scientific Research
11 Jun. 2018 - 31 Mar. 2023
本村 真人, 浅井 哲也, 池辺 将之, 高前田 伸也
DNNアーキテクチャ：単一のネットワーク重みを用いてビットスケーラブルな推論を可能とする手法であるProgressiveNNを提案した．CIFAR-100/ResNet18における評価で1ビット幅の推論精度を65%まで回復させることを確認した．結合重みを乱数に固定したまま結合を枝刈りしていくことで学習する新たなCNN構造(乱数重み固定CNN)の推論アーキテクチャ及びその学習手法の研究を進めた．並行して，低ビット量子化ニューラルネットワークの研究に取り組んだ。既提案のDither NNを一般化し、1b等の低ビット表現ニューラルネットワークの空間方向の自由度を活用する新たな活性化関数を開発した。
DNNの画像処理応用：カスコード型U-netにおいて、特にセンサに特有なポアソンノイズ除去ではタイリングが有効に働くことを見出した。また局所適応画像処理において、低解像度化DCNNによる空間物体の識別によって空間制御パラメータを操作する研究を進めた。
リザーバコンピューティング：原子スイッチが持つ非線形性および短期記憶能力（忘却能力）を活かすアーキテクチャを特徴とする原子スイッチリザーバを構築した。シミュレーション評価により物理レザバーとしては現在最高水準の精度と線形メモリ性能を持つことを示した（国際会議NCSP 2021の学生論文賞を受賞。Journal of Signal Processing誌に掲載決定）。
確率的コンピューティング：多層パーセプトロンのフォワード演算およびバックプロパゲーション演算回路の確率的動作回路の構築および検証が完了した。（1）非線形活性化関数の確率回路表現、（2）負の重み・演算の生物的手法による模擬と確率回路表現、および（3）前述の（1）（2）を理論的に組み込んだ新規バックプロパゲーションアルゴリズムの構築と確率回路表現が完了している（特許出願手続き中）．
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), Tokyo Institute of Technology, 18H05288

Inverstigation on vertical tunnel FET using Si/III-V heterojunction and their three-dimensional integrated circuit applications
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
01 Apr. 2019 - 31 Mar. 2022
Tomioka Katsuhiro
In this research, we developed and explored heterogeneous integration of III-V nanowires heterogeneous for high-speed, low-power, and high-efficiency three-dimensional (3D) circuits application. a nanowire 3D-architecture revolutionized the existing planar integration paradigm, and created a new trend in next-generation electronics. We have created an ultra-efficient tunnel transistors driven by nanowatts based on a new Si/III-V nanowire junction and tunneling transport mechanism. These results would provided new design guidelines for three-dimensional circuit structures based on nanowire TFETs.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 19H02184

ポスト 5G に向けたマルチモーダル情報の効率的活用と触診・遠隔医療技術への応用　　　　　　　　　　　　　　　
ポスト 5G 情報通信システム基盤強化研究開発事業
2020 - 2022
池辺将之 北海道大学付属病院 北海道大学大学院保健科学研究院 日本ユニシス株式会社 株式会社テクノフェイス
NEDO, Principal investigator

Mutual Conversion Method of Shared Computing Power in Deep Convolutional Neural Networks and Useful Image Processing
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
01 Apr. 2018 - 31 Mar. 2021
Ikebe Masayuki
In the local tone mapping we have been working on, the parameters of this process can be defined as the control points for spatial deformation, and we have found that it is appropriate to use DCNN for low-resolution images to identify spatial objects and manipulate the spatial and global control parameters for local functions in the tone-control function of this method. In DCNN (using U-net), image segmentation by tiling was found to be effective, especially for noise reduction (Poisson noise). In the case of tiling, it was found that the PSNR value was maintained at 32 dB even for 11x11 image blocks and overlap 3 pixels.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 18H03213

SOI技術を用いた極低ノイズ・高速イメージングデバイスの研究　　　　　　　　　　　　　　　
科学研究費補助金（新学術領域）
Apr. 2013 - Mar. 2019
川人 祥二
文部科学省, Competitive research funding

A study on ultra-low-noise high-speed imaging devices using SOI technology
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
28 Jun. 2013 - 31 Mar. 2018
Kawahito Shoji
In this study, a high-sensitvity SOI(Silicon-on-insulator) pixelated radiation detector using a pinned depeleted diode structure (SOPIX-PDD) is proposed and its exellent performance is demonstrated with the design and implementation of the SOI semiconductor chips. The SOIPIX-PDD has a pinned p-well layer underneath the buried oxide (BOX) and a depleted channel under the pinned p-well for gathering signal carriers generated at an arbitrary position in the pixel. This structure allows us to realize reduced dark current generated at the Si-SiO2 (BOX) interface, high charge correction efficiency and low-noise carrier detection with the small detector capacitance. An X-ray energy spectrum at 5.9keV is sucessfully measured with the high resolution of 171eV (FWHM). A SOI-based lock-in pixel detector and time-to-digital converter for mass-spectroscopy are also developed.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Shizuoka University, 25109003

Rapid and high resolution molecular imaging with stigmatic imaging mass spectrometry
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
28 Jun. 2013 - 31 Mar. 2018
AWAZU Kunio, TOYODA Michisato, KAWAI Yosuke, HONDO Toshinobu, MATSUOKA Hisanori, ARAI Yasuo, FUJITA Yowichi, IKEBE Masayuki, TSURUMOTO Yuma, Nomura SHUSEI, KAWAI Hayato, IMOTO Eishi, OKAZAKI Ayane, MORIGUCHI Naoki, KANNEN Hiroki
A rapid and high resolution molecular imaging device with stigmatic imaging mass spectrometry has been developed. Since a position and time sensitive ion detector is required for practical use of stigmatic imaging mass spectrometry, novel ion detector has been developed with a semiconductor pixel detector. Prototype ion detectors have been developed two times in FY2013, and one time per year from FY2014 to FY2017. Finally, an ion detector with 192 x 192 pixels in 13.75 x 15.3 mm2, its driving circuit, and control software have been developed in FY2017, and its operation at the target time resolution of 1 ns was confirmed.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Osaka University, 25109009

高速マルチサンプリング超解像 CMOS テラヘルツイメージングデバイスの研究開発　　　　　　　　　　　　　　　
SCOPE フェーズII
2016 - 2018
池辺将之 佐野栄一
総務省, Principal investigator

高速マルチサンプリング超解像 CMOS テラヘルツイメージングデバイスの研究開発　　　　　　　　　　　　　　　
SCOPE フェーズI
2015 - 2016
池辺将之 佐野栄一
総務省, Principal investigator

Development of passive wireless sensor powered by vibration generator for safety surveillance of social infractructure
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
01 Apr. 2012 - 31 Mar. 2015
IGARASHI Hajime, WATANABE Kota, IKEBE Masayuki, MOTOHISA Junichi
Batteryless wireless sensors are very effective for safety surveillance of infrastructures such as bridges, tunnels and steel towers of the power-transmission lines. In this study, vibration generators which power the wireless sensors have been developed. These vibration generators, which harvest energy from minute vibration of the structures, allow us to realize autonomous operation of the wireless sensors.
Although the structures usually have wide vibration spectra, the conventional vibration generators, which have linear vibration modes, cannot harvest sufficient energy at nonresonant frequencies. In this study, it has been found that it is possible to generate chaotic vibration by introducing new design to the vibration generator and this leads to energy harvesting in wider vibration spectra.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 24310117

特に記載なし　　　　　　　　　　　　　　　
特に記載なし
Aug. 2013 - Jul. 2014
IKEBE Masayuki
Semiconductor Technology Academic Research Center, Principal investigator, Competitive research funding

Study on intelligent-processing LSI with multi resolutions- and/or layers- cellular automata
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
2010 - 2012
IKEBE Masayuki
We developed an efficient CA algorithm for single-image super resolution based on low-memory box filtering. In FPGA implementation, we realize real-time QVGA to VGA movie processing and higher-quality jaggy suppression than bi-cubic interpolation. Moreover we implemented a fast 2-D local histogram equalization method, which with compensates halo effects, without kernel-size dependency. Using a2.9-GHz CPU with our method, the algorithm achieves 2 million pixels per 0.4 sec operation without the need for down sampling, Single Instruction/Multiple Data (SIMD) or multi-thread operation.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 22500115

High Performance Silicon On-chip Antenna Using Metamaterials
Grants-in-Aid for Scientific Research(基盤研究(B))
2008 - 2010
Eiichi SANO, Masayuki IKEBE
On-chip antennas are demanded to further lower the cost of wireless CMOS ICs. The low resistivity of silicon substrates is a major obstacle to fabricate high-gain on-chip antennas. We placed an artificial dielectric layer (ADL) between an antenna and Si substrate to improve the antenna gain. A half-wave dipole-antenna that has ADL was designed and fabricated using a CMOS-compatible process with one poly-Si and two metal layers. Using the ADL enhanced gain by 3-dB. The measured gain was the highest ever achieved for the antennas operating at around 10 GHz on low-resistivity Si substrates. A method for further improvement is discussed. In addition to the improved antenna, we investigated wireless communication circuits monolithically integrated with antenna and nano-carbon materials for electromagnetic shielding applications.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 20360148

Study on in telligent-global-processing LSI with cellular automata
Grants-in-Aid for Scientific Research(若手研究(B))
2008 - 2009
Masayuki IKEBE
We developed an efficient CA algorithm for generating quasi linear curves based on finding shortest path between two points with topology reservation and CA algorithm in which a slime mold changes its body to obtain food effectively. Moreover we implemented a fast 2-D diffusion filtering method without kernel-size dependency. Using a dual core 2-GHz CPU with our method, the algorithm achieves 4 million pixels per sec operation without the need for downsampling, Single Instruction/Multiple Data (SIMD) or multi-thread operation.
Ministry of Education, Culture, Sports, Science and Technology, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 20700123

Development of Quantum Integrated Hardwares based on Semiconductor Nanowires
Grants-in-Aid for Scientific Research(基盤研究(A))
2007 - 2009
Junichi MOTOHISA, Masayuki IKEBE, 橋詰 保
We developed a formation method of high-density and highly uniform array of semiconductor nanowires to realize quantum integrated hardwares. In particular, fabrication and characterization of nanowire field-effect transistors (FETs) were charried out, and vertical nanowire FETs on Si substrates were demonstrated. We also proposed vertically-integrated logic circuits based on vertical FETs and investigated a method to laterally align nanowires for their high-density integration.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(A), 北海道大学, Coinvestigator not use grants, Competitive research funding, 19206031

カオス同期を活用した新ワイヤレス通信方式の研究
科学研究費補助金(萌芽研究)
2007 - 2008
佐野 栄一, 池辺 将之
本研究は、自然現象や社会現象で普遍的に見られるカオス同期に学ぶことにより、カオス同期による端末クラスタの形成、クラスタのグラフ論的性質を理解し、クラスタを活用した経路探索プロトコルを考案することにより、これまでのワイヤレス通信システムに革新をもたらす新たな通信方式を創出することを目的とする。昨年度の研究成果を発展させる研究を行った1。(1)カオス発生器を有するノードを円内あるいは直線に沿ってランダムに配置し、カオス発生器としてChua回路、ローレンツ写像、レスラー写像を用いて数値シミュレーションを行った。その結果、近接したノード問のみで同期クラスタを形成するのではなく、飛び地ができるという現象が見つかった。この現象はノード間の位相に深く関係しているものと推定している。(2)同期クラスタ内の端末間で経路探索のための情報をやり取りすることにより、放送型プロトコルと比較して周波数資源効率の向上と経路探索処理の高速化が可能であるとの考え方に基づき、カオス信号を搬送キャリアとしたクラスタ内でのデータ通信が可能か検討した。その結果、Chua回路によるカオス信号をキャリアとした場合にデータ通信成功の確率が高いことを明らかにした。ただし、この場合には確率100%とは限らず、改善策を探る必要がある。(3)新たに考案した発振周期同期型PLLについて、CMOSを用いて試作・評価を行った結果、正常動作を確認し、所期の目的を達成した。また、クロック生成に必要な3分周回路を考案した。(4)Kuramoto発振器としてリング発振器間の注入同期現象をCMOS試作により検討し、二つの発振器間同期を確認した.
文部科学省, 萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 19656093

セルオートマトンによる機能情報処理アルゴリズム・LSIの研究
科学研究費補助金(若手研究(B))
2006 - 2007
池辺 将之
1.セルオートマトンによる仮想粘菌アルゴリズムの研究(アルゴリズム設計)相互作用ルール設計手法を更に発展させ、回転テンプレートを用いた物体のトポロジー制御手法を考案した。粘菌のような生体動作をセルオートマトンで実現するためには、その特性のモデル化が必須となる。本研究では、粘菌が食物(ターゲット)を効率よく取得する体に変体していくモデルの研究を行った。研究にあたってC++言語によるセルオートマトンシミュレータを使用し、アルゴリズムの評価を行った。複雑な迷路を高速に解くセルオートマトン・アルゴリズムの実現に成功した。従来の迷路解析手法に比べ、14値から5値への大幅な状態遷移数の削減に成功し、かつ、ゴールまでに複数の経路があるような複雑な迷路形状においても、最短経路をセル幅1の線として抽出することが可能となった。2.CMOSイメージセンサ上でのフレーム内動き抽出処理の実現CMOSイメージセンサをアナログメモリとみなして、センサ上で演算する手法を実現し、センサチップを開発した。上記LSIでは、PS(プログラマブル・シーケンサ)を用いて演算部の制御を容易にする。相互作用ルールを実現する演算器のスイッチングを、PS用の命令として定義することで外部から容易な制御が可能であり、かつ、製作したLSIの評価・デバッグをシンプルにすることができた。センサの蓄積時間と演算機能により1フレームを取得するだけで動き抽出が可能となった。
文部科学省, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 18700132

GaN-based Chemical Sensors and Their On-chip Integration Using Nanowire Networks
Grants-in-Aid for Scientific Research(基盤研究(B))
2006 - 2007
Hideki HASEGAWA, Masamichi AKAZAWA, Masayuki IKEBE
This project investigates key technologies for realization of GaN-based high-sensitivity chemical sensors and their on-chip integration using nanowires. The main conclusions are as follows: (1) Interface models on Schottky barrier formation are surveyed, and key issues related to AlGaN/GaN Schottky barriers including Fermi level pinning, Schottky barrier height (SBH) and reverse leakage currents are discussed. The current transport is explained by the thin surface barrier (TSB) model. Leakage currents can be reduced by the oxygen gettering process. (2) Pd Schottky barrier hydrogen sensors fabricated on AlGaN/GaN HEMT wafers exhibit unprecedented high sensitivities by applying the oxygen gettering process. (3) Its sensing mechanism is SBH reduction by interface dipole formed by atomic hydrogen which is produced at the Pd surface and diffuses to the Schottky interface. The rate limiting process for transient responses is surface reaction. Mathematical formulas for description of steady-state and transient response are given. (4) Sensitivity of AlGaN/GaN hydrogen sensors increases at higher temperatures, and they perform better than those by other major III-V semiconductors. (5) Slow transients are observed in hydrogen sensor diodes, and they can be explained by the dispersive transport due to time-continual hopping of electrons through surface states. This has led to a new model of current collapse in AlGaN/GaN HEMTs. (6)pH sensing HEMTs fabricated using an electrolyte/AlGaN gate structure, show nearly ideal Nernstian responses. Issues related to realization of bio-sensors using this structure are discussed. (7) For on-chip integration of sensors, implementation of a BDD (binary decision diagram) information processing architecture on hexagonal nanowire networks has been proposed. The proposal includes key elements such as basic integration unit, a sensor bridge, a sensor array structure, a selective MBE method for nanowire network formation and a wireless communication circuit integrated with an on-chip antenna. Their feasibilities have been proved.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 18360002

セルオートマトンによる画像処理用LSIの研究
科学研究費助成事業 特別研究員奨励費
1998 - 1999
池辺 将之
日本学術振興会, 特別研究員奨励費, 北海道大学, 98J02663