姜 錫
| Faculty of Information Science and Technology Media and Network Technologies Information Media Science and Technology | Assistant Professor |
Last Updated :2025/06/07
■Researcher basic information
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Researcher number
- 70360930
J-Global ID
Research Field
Educational Organization
- Bachelor's degree program, School of Engineering
- Master's degree program, Graduate School of Information Science and Technology
- Doctoral (PhD) degree program, Graduate School of Information Science and Technology
■Career
Committee Memberships
■Research activity information
Papers
- A Weight-wise Watermarking Technique for DNN Models and Its Robustness Against Overwriting Attack
Han He, Seok Kang, Yuji Sakamoto
2021 International Workshop on Advanced Image Technology, IWAIT 2021, 6B-3, 1, 4, Jan. 2021, [Peer-reviewed]
English, International conference proceedings - A scrambling technique embedding soundtracks into videos for streaming media
Xuefei Li, Yasutoshi Miura, Seok Kang, Yuji Sakamoto
2018 International Workshop on Advanced Image Technology, IWAIT 2018, A2-2, 1, 4, Institute of Electrical and Electronics Engineers Inc., 30 May 2018, [Peer-reviewed]
English, International conference proceedings - Data hiding technique for omnidirectional JPEG images displayed on VR spaces
Yasutoshi Miura, Xuefei Li, Seok Kang, Yuji Sakamoto
2018 International Workshop on Advanced Image Technology, IWAIT 2018, G3-4, 1, 4, Institute of Electrical and Electronics Engineers Inc., 30 May 2018, [Peer-reviewed]
English, International conference proceedings - Reversible Privacy Protection Technique for Surveillance Camera Images
Yamamoto Yasunori, Li Xuefei, Shimaura Shingo, Kang Seok, Sakamoto Yuji
The Journal of the Institute of Image Information and Television Engineers, 71, 3, J110, J117, 一般社団法人 映像情報メディア学会, 2017, [Peer-reviewed]
Japanese, Scientific journal, 近年，監視カメラ映像におけるプライバシー侵害の問題が注目されている．これまでの可逆的プライバシー保護手法では記録画像の流出による第三者からのプライバシー侵害行為を防ぐことができるが，監視者が確認する記録画像にはプライバシー保護処理が施されていないため，悪意ある監視者によるプライバシー侵害行為を防ぐことができない．監視者が確認する記録画像に対するプライバシー保護手法として，目標画質より算出された二乗誤差を基準としたスクランブル処理とヒストグラム操作による復元に関わる情報の埋め込み処理を組み合わせた手法がある．そこで本稿ではその手法に改良を加え，処理時間を大幅に短縮し，実用に耐えうる技法を実現した．また，改良した手法において，スクランブル強度制御実験，プライバシー保護レベル評価実験および動作の検出実験，さらに単位画像あたりの処理時間測定によるリアルタイム性評価実験を行い，その有効性を確認した． - An image data watermarking technique using the average of a Fresnel-transformed pattern.
Hidetoshi Seto, Yoshinao Aoki, Seok Kang
Proceedings of the 2001 International Conference on Image Processing, 534, 537, IEEE, 2001, [Peer-reviewed]
English, International conference proceedings - Image-Data Watermarking by Embedding a Fresnel-Transformed Pattern
Seok Kang, Yoshinao Aoki
Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 54, 5, 709, 716, Inst. of Image Information and Television Engineers, 2000, [Peer-reviewed]
English, Scientific journal - Image Data Embedding System for Watermarking Using Fresnel Transform.
Seok Kang, Yoshinao Aoki
IEEE International Conference on Multimedia Computing and Systems, 885, 889, IEEE Computer Society, 1999, [Peer-reviewed]
English, International conference proceedings - Digital Image Watermarking by Fresnel Transform and Its Robustness.
Seok Kang, Yoshinao Aoki
Proceedings of the 1999 International Conference on Image Processing, 221, 225, IEEE, 1999, [Peer-reviewed]
English, International conference proceedings - Morphing of 2-D models by Fresnel transform.
Yoshinao Aoki, Seok Kang
Proceedings 1996 International Conference on Image Processing, 727, 730, IEEE Computer Society, 1996, [Peer-reviewed]
English, International conference proceedings
Other Activities and Achievements
- A High Embedding Capacity Watermarking Technique Based on Regularization for Convolutional Neural Network Model
何 晗, 姜 錫, 坂本 雄児, 映像情報メディア学会技術報告 = ITE technical report, 44, 6, 41, 46, Feb. 2020
映像情報メディア学会, Japanese - 全天球画像への情報付加法
姜錫, 三浦康俊, 李雪霏, 坂本雄児, 3次元画像コンファレンス2018, Jul. 2018, [Lead author]
Summary national conference - Improvement of ROI Data Hiding Technique for Selected Region of JPEG Image
三浦 康俊, 李 雪霏, 姜 錫, 坂本 雄児, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 222, 55, 60, 15 Sep. 2016
電子情報通信学会, Japanese - Improvement of ROI Data Hiding Technique for Selected Region of JPEG Image
三浦 康俊, 李 雪霏, 姜 錫, 坂本 雄児, 映像情報メディア学会技術報告 = ITE technical report, 40, 31, 55, 60, Sep. 2016
映像情報メディア学会, Japanese - Additional Data Hiding Technique for Specified Regions of JPEG Image
三浦 康俊, 李 雪霏, 姜 錫, 坂本 雄児, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 33, 1, 6, 19 May 2016
電子情報通信学会, Japanese - A Partial Scrambling Technique with Quantitatively Adjustable Intensity Embedding Different Types of Contents
李 雪霏, 山本 恭徳, 姜 錫, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 115, 397, 25, 30, 18 Jan. 2016
電子情報通信学会, Japanese - Subjective Image and Video Degradation Evaluation Using Privacy Protection Technique
山本 恭徳, 姜 錫, 坂本 雄児, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 115, 397, 75, 80, 18 Jan. 2016
電子情報通信学会, Japanese - A Reversible Partial Scrambling Technique Embedding Different Types of Contents
LI Xuefei, KANG Seok, SAKAMOTO Yuji, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 114, 511, 143, 148, 12 Mar. 2015
In this paper, we propose a reversible partial scrambling technique embedding different types of contents. In the proposed technique, for videos with sound, partial scrambling is generated at the same time when the audio data is being embedded into quantized discrete cosine transform (DCT) coefficients of the video data during the coding process to MPEG4 format. For videos with sound muxing standard videos and standard sounds, verification experiments with the MSB values between the original videos and the recovered videos are carried out to verify the effectiveness of the proposed technique., The Institute of Electronics, Information and Communication Engineers, Japanese - Reversible Privacy Protection Technique Controlling Quantitative Scramble Degree and File Size Increase
SHIMAURA Shingo, KANG Seok, SAKAMOTO Yuji, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 114, 222, 41, 46, 18 Sep. 2014
We propose a reversible privacy protection technique for surveillance camera which enables controlling quantitative scramble degree and file size increase. Our proposed technique combines scrambling method based on square value calculated from target image quality and embedding method using histogram manipulation for reconstruction information in the image compression process, and these are performed in every DCT 8×8 block divided into scrambling area and data hiding area respectively. We confirmed the validity of our technique by scramble degree control experiment with two types of images having different number of people., The Institute of Electronics, Information and Communication Engineers, Japanese - Reversible Privacy Protection Technique Controlling Quantitative Scramble Degree and File Size Increase
島浦 紳吾, 姜 錫, 坂本 雄児, 映像情報メディア学会技術報告 = ITE technical report, 38, 36, 41, 46, Sep. 2014
映像情報メディア学会, Japanese - Evaluation of Threshold Levels using Complexity Distributions in BPCS Steganography Technique
HARADA Syouhei, SHIMAURA Shingo, KANG Seok, SAKAMOTO Yuji, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 113, 415, 33, 38, 27 Jan. 2014
It is necessary to reduce two variance values of the degradation level of stego images and the embedding rate in steganography techniques. We proposed a technique in revaluating threshold levels for judging complexity boundary. This technique can be achieved by determining the complexity distributions, which is consisted by the complexity gained by the judgment of complexity, and the number of macroblocks having the complexity in the BPCS steganography technique, and confirmed the effectiveness. However, parameters used in reevaluation of threshold levels aren't in correlation with the complexity distributions and are set arbitrarily. In this paper, we proposed technique parameters set automatically by a standard deviation of a normal distribution and confirmed the effectiveness by the experiments., The Institute of Electronics, Information and Communication Engineers, Japanese - Histogram Domain Reversible Data Hiding Technique for JPEG Images
SHIMAURA Shingo, HARADA Shohei, KANG Seok, SAKAMOTO Yuji, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 113, 415, 39, 44, 27 Jan. 2014
Xuan proposed a reversible data hiding technique for JPEG images, which embeds secret information using histogram manipulation of the DOT coefficients. The problem regarding Xuan's method revolves around the requirement of the empirical considerations of the two parameters which governs the payload, PSNR, and the file size growth rate of the embedded images. Our method proposes an improvement over Xuan's method, where it can reduce the user's burden and show efficiency of the previous parameters because the conventional parameter have been changed from two to one parameter., The Institute of Electronics, Information and Communication Engineers, Japanese - An Evaluation on Controlling File Size Increase in the Image Partial Scrambling Technique Enables Quantitative Degradation Degree Control by Exchanging DCT Coefficients
SHIMAURA Shingo, HARADA Syouhei, KANG Seok, SAKAMOTO Yuji, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 113, 138, 167, 172, 18 Jul. 2013
The partial scrambling which is performed before variable length coding enables quantitative degradation degree control based on PSNR by fluctuation or exchange of DCT coefficients. However, those methods have problems with file size increase and accuracy deterioration of degradation degree control. Therefore, we proposed the image partial scrambling technique which enables controlling file size increase and improving accuracy of degradation degree control. The proposed method exchanges DCT coefficients based on square error value which one DCT coefficient should reach. Then, we compared our method with other methods about accuracy of degradation degree control and file size growth rate., The Institute of Electronics, Information and Communication Engineers, Japanese - An Evaluation on Controlling File Size Increase in the Image Partial Scrambling Technique Enabled Quantitative Degradation Degree Control by Exchanging DCT Coefficients
島浦 紳吾, 原田 翔平, 姜 錫, 坂本 雄児, 研究報告セキュリティ心理学とトラスト（SPT）, 2013, 24, 1, 6, 11 Jul. 2013
Japanese - Evaluation on Judging Methods of Complexity Boundary in BPCS Steganography Technique
HARADA Syouhei, SHIMAURA Shingo, KANG Seok, SAKAMOTO Yuji, 電子情報通信学会技術研究報告. EMM, マルチメディア情報ハイディング・エンリッチメント, 112, 420, 83, 88, 22 Jan. 2013
It is necessary to reduce two variance values of a degradation level of stego images and an embedding rate in steganography techniques We proposed a technique reevaluating threshold levels for judging complexity boundary by the complexity distributions consisting of complexity gained by judgment of complexity and the number of macroblocks having the complexity in BPCS steganography technique There are vanous complexity judging methods based on side lengths of the boundary line, DF-expressions, 4-neighbor, 8-neighbor, etc In this paper, we discussed the most suitable judging method using the variance values and the computation time calculated by vanous complexity judging methods on the complexity judgment in proposed technique., The Institute of Electronics, Information and Communication Engineers, Japanese - Reevaluation of Threshold Levels for Judging Complexity Boundary Using Distributions of Complexity in BPCS Steganography Technique
原田 翔平, 姜 錫, 坂本 雄児, 電子情報通信学会技術研究報告 : 信学技報, 112, 129, 1, 8, 19 Jul. 2012
電子情報通信学会, Japanese - I-090 Image Partial Scrambling Technique for Controlling Increase in Size of File of Scrambled Image by Exchanging DCT Coefficient
Chou Kizawa, Kang Seok, Sakamoto Yuji, 情報科学技術フォーラム講演論文集, 10, 3, 511, 512, 07 Sep. 2011
Forum on Information Technology, Japanese - I-089 A Digital Watermarking Technique Having Applicability to the Partial Scrambled Video
Wakairo Hiroaki, Kang Seok, Sakamoto Yuji, 情報科学技術フォーラム講演論文集, 10, 3, 509, 510, 07 Sep. 2011
Forum on Information Technology, Japanese - An evaluation of controlling increase of data size in the partial scrambling technique considering visual characteristics
神 智博, 姜 錫, 坂本 雄児, 研究会講演予稿, 251, 57, 60, 23 Jul. 2010
画像電子学会, Japanese - An Evaluation of Controlling Increase of Data Size in the Partial Scrambling Technique Considering Visual Characteristics
JIN Tomohiro, KANG Seok, SAKAMOTO Yuji, ITE Technical Report, 34, 31, 57, 60, 23 Jul. 2010
This paper proposes a decreasing technique of increase rate of data size in the partial scrambling technique. In the proposed technique, quantized DCT coefficients in I-frames are shuffled or changed by a target image quality for PSNR. The amount of change to scramble is corrected in order to be independent on the kinds of videos, and to shuffle or to change the quantized DCT coefficients is selected to decrease the increase rate of data size. In addition, the result of increase rate of data size and subjective evaluation experiment show the effectiveness of the proposed technique., The Institute of Image Information and Television Engineers, Japanese - A Partial Video Scrambling Technique by Changing Motion Vectors and Its Evaluation
MIYAKAWA Kentaro, KANG Seok, SAKAMOTO Yuji, IEICE technical report. Life intelligence and office information systems, 109, 379, 37, 42, 14 Jan. 2010
Partial video scrambling techniques which don't encrypt but degrade video contents have been proposed in order to use the scrambled video as the sample video in paid video delivery services. Deliverers can make scrambled videos which have degrading degree needed by controlling the scrambling strength. In this study, we proposed a partial video scrambling technique by changing the values of motion vectors of MPEG and evaluated the degrading degree and concealing degree of the scrambled videos., The Institute of Electronics, Information and Communication Engineers, Japanese - An Investigation of MPEG Video Scrambling with Variable Concealed Levels Considering Visual Characteristics and Its Evaluation
SAWADA Keiichi, KANG Seok, SAKAMOTO Yuji, ITE Technical Report, 32, 56, 41, 45, 11 Dec. 2008
In this paper, we propose a MPEG video scrambling method that have the ability to control the concealed level considering visual characteristics. In the proposed method, a target PSNR of the scrambled video is appointed, and the quantized DCT coefficients in I-frames are changed accodring to the target PSNR. The proposed method corrects the amount of changes considering visual characteristics, so the characteristics of the video don't influence the concealed level. In addition, the proposed method can suppress an increase of data size by restricting the range of cofficients scrambled. Subje..., The Institute of Image Information and Television Engineers, Japanese - An Investigation of MPEG Video Scrambling with Variable Concealed Levels Considering Visual Characteristics and Its Evaluation
SAWADA Keiichi, KANG Seok, SAKAMOTO Yuji, IPSJ SIG Notes, 2008, 124, 41, 45, 04 Dec. 2008
In this paper, we propose a MPEG video scrambling method that have the ability to control the concealed level considering visual characteristics. In the proposed method, a target PSNR of the scrambled video is appointed, and the quantized DCT coefficients in I-frames are changed accodring to the target PSNR. The proposed method corrects the amount of changes considering visual characteristics, so the characteristics of the video don't influence the concealed level. In addition, the proposed method can suppress an increase of data size by restricting the range of cofficients scrambled. Subjective evaluation test show that the proposed method is effective., Information Processing Society of Japan (IPSJ), Japanese - An Investigation of MPEG Video Scrambling with Variable Concealed Levels Considering Visual Characteristics and Its Evaluation
SAWADA Keiichi, KANG Seok, SAKAMOTO Yuji, IEICE technical report, 108, 344, 41, 45, 04 Dec. 2008
In this paper, we propose a MPEG video scrambling method that have the ability to control the concealed level considering visual characteristics. In the proposed method, a target PSNR of the scrambled video is appointed, and the quantized DCT coefficients in I-frames are changed accodring to the target PSNR. The proposed method corrects the amount of changes considering visual characteristics, so the characteristics of the video don't influence the concealed level. In addition, the proposed method can suppress an increase of data size by restricting the range of cofficients scrambled. Subjective evaluation test show that the proposed method is effective., The Institute of Electronics, Information and Communication Engineers, Japanese - I-025 An Investigation of Control of Image Quality of scrambling Technique of Video by Changing Motion Vectors
Miyakawa Kentaro, Kang Seok, Sakamoto Yuji, 情報科学技術フォーラム講演論文集, 7, 3, 249, 250, 20 Aug. 2008
Forum on Information Technology, Japanese - An Investigation of Video Quality Control of MPEG Video Scrambling Considering Visual Characteristics
SAWADA Keiichi, KANG Seok, SAKAMOTO Yuji, IEICE technical report, 107, 487, 7, 11, 12 Feb. 2008
Recently, the content delivery services such as the Internet deliveries and Pay-TV have become active. However, it has not gotten the users as many as the free deliveries, and it has the problems of the piracy. Then, the methods by scrambling video data recognizably as sample data have proposed in order to get the users and protect a copyrights. However, in the previous works it is necessary to adjust the parameters interactively to control the quality of the scrambled video. Then, in this paper we propose a method that control the quality of the scrambled video by calculating the degree of..., The Institute of Electronics, Information and Communication Engineers, Japanese - An investigation of video quality control of MPEG video scrambling considering visual characteristics
澤田 圭一, 姜 錫, 坂本 雄児, ITE technical report, 32, 10, 7, 11, Feb. 2008
映像情報メディア学会, Japanese - An Investigation of an Embedding Technique of Fingerprint data into Sound Data using Fuzzy Vault
LEE JaeHee, KANG Seok, SAKAMOTO Yuji, IPSJ SIG Notes, 2007, 125, 13, 17, 13 Dec. 2007
An investigation of an Embedding Technique of Fingerprint data into Sound Data using Fuzzy Vault., Information Processing Society of Japan (IPSJ), Japanese - An Investigation of an Embedding Technique of Fingerprint data into Sound Data using Fuzzy Vault
Lee JaeHee, Kang Seok, Sakamoto Yuji, IEICE technical report. Image engineering, 107, 380, 13, 17, 06 Dec. 2007
An investigation of an Embedding Technique of Fingerprint data into Sound Data using Fuzzy Vault., The Institute of Electronics, Information and Communication Engineers, Japanese - An investigation of an embedding technique of fingerprint data into sound data using fuzzy vault
李 在煕, 姜 錫, 坂本 雄児, ITE technical report, 31, 64, 13, 17, Dec. 2007
映像情報メディア学会, Japanese - Examination of Watermarking Method Using Moire Patterns
MIYOSHI Kunihiko, KANG Seok, SAKAMOTO Yuji, ITE technical report, 2007, 27, 51, 56, 27 Sep. 2007
映像情報メディア学会, Japanese - Examination of watermarking method using moire patterns
三好 邦彦, 姜 錫, 坂本 雄児, ITE technical report, 31, 42, 51, 55, Sep. 2007
映像情報メディア学会, Japanese - A-7-18 Degraded Watermarking Method Using Pseudo-Random Number
Sawada Keiichi, Kang Seok, Proceedings of the IEICE General Conference, 2007, 0, 222, 222, 07 Mar. 2007
The Institute of Electronics, Information and Communication Engineers, Japanese - An Investigation of Filesize Reducing in Degrading Data Embedding Technique
SAITO Takuya, KANG Seok, IPSJ SIG Notes, 2007, 8, 9, 15, 26 Jan. 2007
Recently illegal outflow and copying of digital contents on the Internet has become a serious problem. Digital Rights Management (DRM) has attracted attention as a method to prevent such illegal actions. We proposed a new reversible data embedding technique that degrades the image quality by distorting several frequency regions of the frequency-transformed pattern of an original image using the encoded information on the coefficient characteristics and the key value of legal user's ID. In this paper, we propose and investigate the technique to reduce filesize of JPEG images degraded by form..., Information Processing Society of Japan (IPSJ), Japanese - モアレを利用した電子透かし技法に関する検討
三好邦彦, 姜錫, 坂本雄児, 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 - D-11-9 The Intensification of Security in Degraded Data Embedding Technique Using Hash Function
Saito Takuya, Kang Seok, Aoki Yoshinao, Proceedings of the IEICE General Conference, 2005, 2, 9, 9, 07 Mar. 2005
The Institute of Electronics, Information and Communication Engineers, Japanese - A DRM Technique Using a Reversible Data Enbedding
KATO Yukichika, KANG Seok, AOKI Yoshinao, ITE technical report, 29, 9, 95, 100, 04 Feb. 2005
映像情報メディア学会, Japanese - A DRM Technique Using a Reversible Data Enbedding
Kato Yukichika, Kang Seok, Aoki Yoshinao, IEICE technical report. Image engineering, 104, 649, 95, 100, 28 Jan. 2005
Recently illegal outflow and copying of digital contents on the Internet has become a serious problem. Digital Rights Management (DRM) has attracted attention as a method to prevent such illegal actions. In this paper, we propose a new reversible data embedding technique that degrades the image quality by distorting several frequency regions of the frequency-transformed pattern of an original image using the encoded information on the coefficient characteristics and the key value of legal user's ID. The degree of degradation can be controlled, and the noise generated by degradation can be r..., The Institute of Electronics, Information and Communication Engineers, Japanese - J-038 Attack on Watermarked Imeges by the Inflection of Distance Parameter of Fresnel Transform
Kang Seok, Aoki Yoshinao, 情報科学技術フォーラム一般講演論文集, 3, 3, 289, 290, 20 Aug. 2004
Forum on Information Technology, Japanese - J-039 An Data Embedding Technique for DRM
Kato Yukichika, Kang Seok, Aoki Yosinao, 情報科学技術フォーラム一般講演論文集, 3, 3, 291, 292, 20 Aug. 2004
Forum on Information Technology, Japanese - M-017 Motion Recognition of Hand Using Acceleration Sensors
Kanno Go, Seok Kang, Aoki Yoshinao, 情報科学技術フォーラム一般講演論文集, 3, 4, 125, 126, 20 Aug. 2004
Forum on Information Technology, Japanese - A-7-4 An Investigation of a Watermarking Technique Using Cellular Automaton Transform
Shiba Reiko, Kang Seok, Aoki Yoshinao, Proceedings of the IEICE General Conference, 2004, 0, 207, 207, 08 Mar. 2004
The Institute of Electronics, Information and Communication Engineers, Japanese - INVESTIGATION OF APPLYING OF WATERMARKING TECHNIQUE ON AUTHENTICATION SYSTEM
Kang Seok, Song JaeJoo, Aoki Yoshinao, Proceedings of the IEICE General Conference, 2003, 2, 130, 130, 03 Mar. 2003
The Institute of Electronics, Information and Communication Engineers, Japanese - Digital Watermarking Technique Using the Average of DCT Coefficients
Morita Yuji, Seto Hidetoshi, Kang Seok, Aoki Yoshinao, Technical report of IEICE. DSP, 100, 209, 37, 42, 17 Jul. 2000
In this paper, we propose a new technique for embedding and extracting digital watermarks. Our technique focuses on embedding technique using the average value of DCT coefficients. Since the proposed method does not require the original image for extracting watermark data, it can be potentially employed as a convenient watermarking technique. This paper shows some preliminary experimental results that investigated the robustness of the proposed method by the benchmark program StirMark., The Institute of Electronics, Information and Communication Engineers, Japanese - Color Image Watermarking Technique Using Fresnel Transform and Its Robustness Against JPEG Compression
Seto Hidetoshi, Morita Yuji, Kang Seok, Aoki Yoshinao, Technical report of IEICE. DSP, 100, 209, 43, 48, 17 Jul. 2000
By spreading of the Internet and the advance in digital techniques, it is possible to copy and edit multimedia data. These situations cause the illicit actions such as interception, duplication, misuse and unauthorized modification of information. One approach to address the problem is watermarking technique. Watermarking is a technique to embed hidden information imperceptibly in multimedia contents. In this paper, we outline a new color image watermarking technique using Fresnel transform. The watermark image is Fresnel-transformed and the resulting intensity pattern is embedded in the lu..., The Institute of Electronics, Information and Communication Engineers, Japanese - Investigation of Watermarking Method Using Fresnel Transform
Kang Seok, Aoki Yoshinao, Proceedings of the IEICE General Conference, 1999, 2, 45, 45, 08 Mar. 1999
The Institute of Electronics, Information and Communication Engineers, Japanese - Investigation of 2-D Shapes Morphing by Rotation of Fourier Spectum
Seok Kang, Aoki Yoshinao, Proceedings of the Society Conference of IEICE, 1998, 0, 195, 195, 07 Sep. 1998
The Institute of Electronics, Information and Communication Engineers, Japanese - Investigation of Morphing of Three-Dimensional Shapes by Fourier Transform
Kang Seok, Aoki Yoshinao, Proceedings of the IEICE General Conference, 1997, 2, 192, 192, 06 Mar. 1997
周波数領域でのモーフィングの技法がJohnにより提案されている。その方法では高周波数成分の分布によってはモーフィングがうまくいかないことがある。本稿では周波数領域でモーフィングを行う時、滑らかに中間画像を取りながら、[1]の問題点を解決するために予めローパスフィルタを用いて高周波成分を除去した後でモーフィングを行う方法について考察した。, The Institute of Electronics, Information and Communication Engineers, Japanese - Morphing of Two-Dimensional Shapes by Fresnel Transform
Aoki Yoshinao, Kang Soek, Proceedings of the IEICE General Conference, 1996, 2, 157, 157, 11 Mar. 1996
フーリエ変換を用いて3次元モデルのモーフィングを行う方法が提案されている。この方法は3次元モデルの表面が複雑になり、フーリエスベクトルの高周波成分が支配的になるとうまくいかなくなる。本研究ではこの困難さを回避する方法として,フーリエ変換の代わりにフレネル変換を用いたモーフィング技法を提案し、2次元図形モデルによる実験を行い,その妥当性を確かめた。, The Institute of Electronics, Information and Communication Engineers, Japanese - Investigation of Morphing of Two-Dimensional Shapes by Fourier Transform
Kang Seok, Aoki Yoshinao, Proceedings of the IEICE General Conference, 1996, 2, 158, 158, 11 Mar. 1996
周波数領域でのモーフィングの技法がJohnにより提案されている。その方法では高周波数成分の分布によってはモーフィングがうまくいかないことがある。本稿では周波数領域でモーフィングを行う時、滑らかに中間画像を取りながら、[1]の問題点を解決するために予めローパスフィルタを用いて高周波成分を除去した後でモーフィングを行う方法について考察した。, The Institute of Electronics, Information and Communication Engineers, Japanese
Books and other publications
Research Themes
- A Study on DRM Technique Using Partial Video Scrambling
Grants-in-Aid for Scientific Research
2011 - 2011
KANG Seok
The results of the research "A study on DRM Technique Using Partial Video Scramble" are summarized as follows:It develops the partial scramble technique that can control the degradation degree quantitativelyIt restrains file size increase by scrambling less than 5%It develops the partial scramble technique to be driven at Android device
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 23650036 - 2.X次元絵画マルチメディア・アートの理論展開と技法開発
科学研究費補助金(萌芽研究)
2002 - 2004
青木 由直, 三橋 龍一, 青木 直史, 姜 錫
コンピュータグラフィックス(CG)技法において、3次元モデルを2次元の画面に表示する原理により、2次元と3次元の中間に位置する2.X次元のアートと呼べる、新しいマルチメディア・アート技法を開発した。開発技法で実際に2.X次元アートの作品を制作してみて、評価と考察を行った。開発技法は従来TIP(Tour Into the Picture)と呼ばれているCG技法を参考にしており、1枚の手書きスケッチから擬似3次元画像を制作して表示する技法の開発を進めた。この技法では、絵の中に描き込まれた対象物や景観を切り出して、これに距離情報を付加したキャンバスに貼り付け、絵のモデルの再構成を行う必要がある。従来の方法ではこれを手作業で行っていて、利用上で手間のかかるもので、新しいアートのツールとして定着させるには難点があった。この点を改良して、対象物の切り出しと切り出した画面の抜け跡を背景で埋める作業を半自動化する技法を開発した。その際、表示画面上での切り出し作業や穴埋め作業をペン型のマウス(タブレットPC)で行えるようにして、利用者に使い易いシステムを開発した。視点や視線方向の設定、目の動きの設定、等も画面上のメニューから選べるようにしており、一般の利用者でも容易に使えるようなシステムとして完成させた。このシステム構築に際して、手描きの絵から遠近情報を取り出す方法の考察、アニメーション表示に...
文部科学省, 萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 14655137
