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- 変形連想記憶モデルの統計的性質, 東京工業大学大学院 理工学研究科 応用物理学専攻 修士論文(1997年3月)
- 画像用電子透かしに関する研究, 東京工業大学大学院 総合理工学研究科 物理情報システム創造専攻 博士論文(2003年3月)
- I. Echizen, Y. Fujii, T. Yamada, S. Tezuka, and H. Yosihura: Adaptive Embedding and Detection for Improved Video Watermarking, in Intelligent Multimedia Data Hiding (J. S. Pan, W. C. Fang, H. C. Huang, and L. C. Jain, eds), Chapter 7, pp. 157-187, Springer-Verlag, 2007.
- T. Yamada, I. Echizen, S. Tezuka, H. Yoshiura, N. Komada: Evaluation of PC-based real-time watermarking system for long-term video preservation, in Long-Term and Dynamical Aspects of Information Security: Emerging Trends in Information and Communication Security (A. Schmidt, M. Kreutzer, and R. Accorsi, eds), Chapter 6, pp. 73-85, Nova Science Publishers, (June 2007).
- I. Echizen, Y. Atomori, S. Nakayama, and H. Yoshihura: Dual-plane Correlation-based Video Watermarking for Immunity to Rotation, Scale, Translation, and Random Distortion, in Artificial Intelligence in Multimedia Data Hiding (J. S. Pan, H. C. Huang, and L. C. Jain, eds), Chapter *, pp. **-**, Springer-Verlag, 2009.
- I. Echizen, H. Yoshiura, T. Arai, H. Kimura, T. Takeuchi : General Quality Maintenance Module for Motion Picture Watermarking, IEEE Trans. Consumer Electronics, Vol. 45, No. 4, pp. 1150-1158, (November 1999).
- 越前 功,吉浦 裕,安細康介,田口順一,黒須 豊,佐々木良一,手塚 悟 :輪郭保存に基づく電子透かしの画質維持方式, 情報処理学会論文誌, Vol. 41, No. 6, pp. 1828-1839, (2000年6月).
- 越前 功,吉浦 裕,安細康介,佐々木良一 :分布推定手法を用いた電子透かしの検出誤り確率推定方式, 情報処理学会論文誌, Vol. 42, No. 8, pp. 2006-2016, (2001年8月).
- 越前 功,吉浦 裕,田口順一,中野和典,佐々木 良一 :動き検出に基づく動画用電子透かしの画質維持方式, 情報処理学会論文誌, Vol. 43, No. 8, pp. 2529-2541, (2002年8月).
- 藤井康広,中野和典,越前 功,吉浦 裕 :局所特徴量を用いた二値画像用電子透かしの画質維持方式, 情報処理学会論文誌, Vol. 44, No. 8, pp. 1872-1883, (2003年8月).
- 山田隆亮,吉浦 裕,越前 功,小川一人,室田逸郎,大竹 剛,合志清一 :放送コンテンツの著作権保護における電子透かしの利用方法, 映像情報メディア学会誌(査読論文), Vol. 57, No. 9, pp. 1155-1167, (2003年9月).
- I. Echizen, H. Yoshiura, K. Anzai, J. Taguchi, K. Nakano, S. Tezuka :Improved Video Watermarking for MPEG Encoders Using Motion Analysis, Journal of the Institute of Image Information and Television Engineers, Vol. 58, No. 2, pp. 233-242, (February 2004).
- 藤井康広,越前 功,山田隆亮,手塚 悟,吉浦 裕 : 電子透かし検出に適した誤り訂正符号の拡張方式, 情報処理学会論文誌, Vol. 45, No. 8, pp. 1980-1997, (2004年8月). <論文賞>
- H. Yoshiura, I. Echizen : Color Picture Watermarking Correlating Two Constituent Planes for Immunity to Random Geometric Distortion, IEICE Trans. on Information & Systems, Vol. E87-D, No. 9, pp. 2239-2252, (September 2004).
- 寺田光一,藤川義文,藤井由紀夫,越前 功,吉浦 裕,西岡清和,坂東忠秋 :メディアプロセッサを用いたリアルタイム電子透かし装置, 映像情報メディア学会誌(査読論文), Vol. 58, No. 12, pp. 1820-1827, (2004年12月).
- I. Echizen, Y. Fujii, T. Yamada, S. Tezuka, H. Yoshiura : Perceptually Adaptive Video Watermarking Using Motion Estimation, International Journal of Image and Graphics, Vol. 5, No. 1, pp. 89-109, World Scientific, (January 2005).
- 石井真之,鹿志村浩史,佐々木良一,吉浦 裕,越前 功,伊藤信治 :2階層電子透かしの有効性の評価 , 情報処理学会論文誌, Vol. 46, No. 8, pp. 2053-2067, (2005年8月).
- H. Yoshiura, I. Echizen : Maintaining Picture Quality and Improving Robustness of Color Watermarking by Using Human Vision Models, IEICE Trans. on Information & Systems, Vol. E89-D, No. 1, pp. 256-270, (January 2006).
- I. Echizen, Y. Fujii, T. Yamada, S. Tezuka, H. Yoshiura : Use of Statistically Adaptive Accumulation to Improve Video Watermark Detection, Online version: IPSJ Digital Courier, Vol. 2, pp. 537-550, Paper version: IPSJ Journal, Vol.47, No. 8, pp. 2440-2453, (August 2006).
- 山田隆亮,越前 功,手塚 悟,吉浦 裕 :普及モデルPC上のソフトウェアによるリアルタイム動画電子透かし埋め込みシステム, 電気学会論文誌C, Vol. 126-C, No. 9, pp. 1127-1137, (2006年9月).
- 大中 雅憲,中山 心太,後守 祐介,越前 功,吉浦 裕 : カラー画像の二つの色成分の関係に基づいて多様な幾何変形に対応する画像電子透かし方式, 情報処理学会論文誌,Vol. 49, No. 3, pp. 1387-1401, (2008年3月).
- I. Echizen, Y. Atomori, S. Nakayama, H. Yoshiura: Use of Human Visual System to Improve Video Watermarking for Immunity to Rotation, Scale, Translation, and Random Distortion, Circuits, Systems and Signal Processing (CSSP), vol.27, no.2, pp. 213-227, (April 2008).
- Y. Atomori, I. Echizen, M. Dainaka, S. Nakayama, H. Yoshiura: Robust Video Watermarking based on Dual-plane Correlation for Immunity to Rotation, Scale, Translation, and Random Distortion, Journal of Digital Information Management, vol.6, no.2, pp. 161-167, (April 2008).
- Y. Atomori, I. Echizen, H. Yoshiura, Picture Watermarks Surviving General Affine Transformation and Random Distortion, International Journal of Innovative Computing, Information and Control (IJICIC), vol. ***, no.**, pp.****-****, accepted
- H. Yoshiura, I. Echizen, T. Arai, H. Kimura, T. Takeuchi :VSP: A Digital Watermark Method for Motion Picture Copyright Protection, Proc. of 1998 IEEE International Conference on Consumer Electronics (ICCE 1998), pp. 338-339 (June 1998).
- H. Yoshiura, I. Echizen, T. Arai, H. Kimura, T. Takeuchi :General Quality-Maintenance Module for Motion Picture Watermarking, Proc. of 1999 IEEE International Conference on Consumer Electronics (ICCE 1999), pp. 98-99 (June 1999).
- H. Yoshiura, I. Echizen, K. Anzai, J. Taguchi, K. Nakano : Improved Video Watermarking for MPEG Encoders Using Motion Analysis, Proc. of 2002 IEEE International Conference on Consumer Electronics (ICCE 2002), pp. 14-15 (June 2002).
- H. Yoshiura, I. Echizen, K. Anzai, K. Nakano, Y. Fujii : Reliable Detection of Video Watermarks Using Inferential Statistics, Proc. of 2003 IEEE International Conference on Consumer Electronics (ICCE 2003), pp. 60-61 (June 2003).
- I. Echizen, H. Yoshiura, Y. Fujii, S. Tezuka : Use of Motion Estimation to Improve Video Watermarking for MPEG Encoders, Proc. of International Workshop on Digital Watermarking (IWDW 2003), Lecture Notes in Computer Science Vol. 2939, pp. 184-199, Springer-Verlag, (October 2003).
- T. Yamada, Y. Fujii, I. Echizen, K. Tanimoto, S. Tezuka : Print Traceability Systems Framework using Digital Watermarks for Binary Images, Proc. of IEEE International Conference on Systems, Man and Cybernetics (SMC 2004), pp. 3285-3290, (October 2004).
- Y. Fujii, I. Echizen, T. Yamada, S. Tezuka, H. Yoshiura : Error Correction of Statistically Unstable Signals in Consumer Wireless Network, Proc. of 2005 IEEE International Conference on Consumer Electronics (ICCE 2005), pp. 171-172 (January 2005).
- I. Echizen, H. Yoshiura, Y. Fujii, T. Yamada, S. Tezuka : Use of Inferential Statistics to Estimate Error Probability of Video Watermarks, Proc. of Security and Watermarking of Multimedia Contents VII, SPIE, Vol. 5681, pp. 391-399 (January 2005).
- T. Yamada, Y. Fujii, S. Tezuka, I. Echizen, N. Komada : Watermarking Application System for Map Content Distribution, Proc. of 2005 IRMA International Conference (IRMA 2005), pp.618-621, (May 2005).
- I. Echizen, Y. Fujii, T. Yamada, S. Tezuka, H. Yoshiura : Correlation-Based Model of Color Picture Watermarking against Random Geometric Distortion, Proc. of IEEE International Conference on Multimedia & Expo (ICME 2005), in CD-ROM, (July 2005).
- I. Echizen, Y. Fujii, T. Yamada, S. Tezuka, H. Yoshiura : Improved Video Watermark Detection Using Statistically-Adaptive Accumulation, Proc. of Knowledge-Based Intelligent Information and Engineering Systems: 9th International Conference (KES 2005), Lecture Notes in Computer Science Vol. 3684, pp. 300-308, Springer-Verlag, (September 2005).
- I. Echizen, T. Yamada, Y. Fujii, S. Tezuka, H. Yoshiura : Real-time video watermark embedding system using software on personal computer, Proc. of IEEE International Conference on Systems, Man and Cybernetics (SMC 2005), pp. 3369-3373, (October 2005).
- T. Yamada, I. Echizen, S. Tezuka, H. Yoshiura, N. Komada : Evaluation of real-time video watermarking system on a commodity PC, Proc. of International Workshop on Long-Term Security (in conjunction with ETRICS2006), http://www.etrics.org/workshop-4_lts.php, (June 2006).
- I. Echizen, K. Tanimoto, T. Yamada, M. Dainaka, S. Tezuka, H. Yoshiura : PC-based real-time watermark embedding system with standard video interface, Proc. of IEEE International Conference on Systems, Man and Cybernetics (SMC 2006), pp. 267-271, (October 2006).
- I. Echizen, S. Singh, T. Yamada, K. Tanimoto, S. Tezuka : Integrity Verification System For Video Content By Using Digital Watermarking, Proc. of IEEE International Conference Service Systems and Service Management (IEEE/SSSM'06), pp. 1619-1624, (October 2006).
- I. Echizen, T. Yamada, S. Tezuka, S. Singh, H. Yoshiura : Improved Video Verification Method Using Digital Watermarking, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2006), pp. 445-448, (December 2006). <Best Paper Award>
- M. Dainaka, S. Nakayama, I. Echizen, H. Yoshiura : Dual-plane watermarking for Color Pictures Immune to Rotation, Scale, Translation, and Random Bending, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2006) , pp. 93-96, (December 2006). <Invited paper>
- H. Tanaka, S. Sasaki, I. Echizen, H. Yoshiura: Secure Generation of Digital Signature on Compromised Computer, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2007), pp. 12-15, (November 2007). <Invited paper>
- I. Echizen, Y. Atomori, S. Nakayama, H. Yoshiura: HVS-Based Robust Video Watermarking with Dual-plane Correlation, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2007), pp. 20-24, (November 2007). <Invited paper>
- R. Ebisawa, Y. Fujii, T. Yamada, S. Tezuka, I. Echizen: Use of Gap-Filling Operation to Enhance Image Quality of Binary Image Watermarking, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2007), pp. 25-28, (November 2007). <Invited paper>
- T. Endo, I. Echizen, H. Yoshiura: Electronic Voting Scheme to Maintain Anonymity in Small-scale Election by Hiding the Number of Votes, Proc. of International Workshop on Advances in Information Security (WAIS2008), pp. 1287-1293, (March 2008).
- T. Yamada, Y. Takahashi, H. Yoshiura, I. Echizen: Evaluation of PC-based Real-Time Watermark Embedding System for Standard-Definition Video stream, International Symposium on Intelligent Interactive Multimedia Systems and Services (KES IIMSS08), New Directions in Intelligent Interactive Multimedia, Studies in Computational Intelligence Vol. 142, pp. 331-340, Springer-Verlag, (July 2008).
- T. Yamada, Y. Takahashi, Y. Fujii, R. Ebisawa, H. Yoshiura, I. Echizen: Evaluation of Integrity Verification System for Video Content Using Digital Watermarking, International Symposium on Intelligent Interactive Multimedia Systems and Services (KES IIMSS08), New Directions in Intelligent Interactive Multimedia, Studies in Computational Intelligence Vol. 142, pp. 363-372, Springer-Verlag, (July 2008).
- Yusuke Atomori, Isao Echizen, Hiroshi Yoshiura: Picture Watermarks Surviving General Affine Transformation and Random Distortion, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2008), pp. 315-318, (August 2008). <Invited paper>
- S. Kaneko, I. Echizen, H. Yoshiura, Evaluation and Improvement of Digital Watermarking Algorithm based on Cryptographic Security Models, IWDW08, LNCS****, pp. ***-***, (November 2008)
- M. Tran, T. Nguyen, I. Echizen: Pool-based APROB Channel to Provide Resistance against Global Active Adversary under Probabilistic Real-Time Condition, Proc. of 2008 IEEE/IFIP International Symposium on Trust, Security and Privacy for Pervasive Applications (TSP-08), pp. 257-263, (December 2008).
- S. Wohlgemuth, G. Mueller, N. Sonehara, I. Echizen, On Observable Delegation of Personal Data by Watermarking, (5th IEEE workshop on DRM Impact on Consumer Communications: CCNC 2009), pp. 1-5, (January 2009).
- X. Huang, I. Echizen, Y. Abe, Evaluation of Synchronized Significant Multi-bits Acoustic Steganography Method, Proc. of AES Tokyo Convention 2009, pp. 1-11, in CD-ROM, (May 2009).
- S. Wohlgemuth, I. Echizen, N. Sonehara, G. Müller, On Privacy in Business Processes - Observing Delegation of Personal Data by Using Digital Watermarking, Proc. of International Conference on e-Business (ICE-B 2009), pp. 27-32, (July 2009).
- M. Tran, A. Duong, I. Echizen, XPROB - A Generalized Pool-Based Anonymous Communication Framework, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2009), pp. ***-***, (September 2009)
- S. Wohlgemuth, N. Sonehara, G. Mueller, I. Echizen, On Privacy-aware Delegation of Personal Data using Digital Watermarking, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2009), pp. ***-***, (September 2009)
- S. Nakayama, I. Echizen, H. Yoshiura, Preventing False Positives in Content-Based Phishing Detection, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2009), pp. ***-***, (September 2009)
- A. Savoldi, P. Gubian, I. Echizen, A Comparison between Windows Mobile and Symbian S60 Embedded Forensics, Proc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2009), pp. ***-***, (September 2009)
- A. Savoldi, P. Gubian, I. Echizen, How to Deal with Blurriness in Live Forensics: A Case of Study, Proc. of 5th International Joint Conference on INC, IMS and IDC (NCM2009), pp. ***-***, (August 2009)
- M. Tran, A. Duong, and I. Echizen, RPROB - A Family of Binomial-Mix-based Anonymous Communication Systems, Proc. of 2009 IEEE/IFIP International Symposium on Trust, Security and Privacy for Pervasive Applications (TSP-09), pp. ***-***, (October 2009).
- 越前 功 : 「著作権保護と電子透かし技術」,瀬戸洋一(編): ユビキタス時代の情報セキュリティ技術, 日本工業出版, 第9章 (pp. 153-176), (2003年9月).
- 越前 功,吉浦 裕 :実践的情報セキュリティ入門(全12回)第7回 著作権保護 -不正コピー防止技術を中心として-, 月刊バーコード, Vol. 16, No. 2, pp. 62-67, 日本工業出版株式会社, (2003年2月).
- 手塚 悟,宝木和夫,三村昌弘,高田安章,越前 功 :これからの社会を守る日立の先進セキュリティ技術, 日立評論, Vol. 88, No. 4, pp. 56-59, (2006年4月号).
- 越前 功 :電子透かし技術とその応用, 情報処理学会誌, Vol. 47, No. 11, pp. 1243-1249, (2006年11月).
- 越前 功 : 「情報ハイディング技術」,瀬戸,織茂,寺田,佐藤(編): 情報セキュリティ概論, 日本工業出版, 第8章(pp. 167-187), (2007年10月).
- 越前 功:デジタルメディア流通のセキュリティ~電子透かしによるメディアの権利保護~,情報通信ジャーナル,vol.26,no. 10, pp.40-41, (2008年10月).
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- K. Nakano, J. Taguchi, H. Yoshiura, I. Echizen, Y. Kurosu: Method of authenticating digital-watermark pictures , US Patent No.6418232 (Issued: 2002/07/09).
- I. Echizen, H. Yoshiura, K. Anzai, Y. Kurosu: Method of extracting digital watermark information and method of judging bit value of digital watermark information, US Patent No.6456727 (Issued: 2002/09/24).
- I. Echizen, H. Yoshiura, K. Anzai, Y. Kurosu: Method of extracting digital watermark information and method of judging bit value of digital watermark information, US Patent No.6563935 (Issued: 2003/05/13).
- J. Taguchi, H. Yoshiura, I. Echizen, A. Maeda, T. Arai, T. Takeuchi: Digital watermark image processing method, US Patent No.6584210 (Issued: 2003/06/24).
- I. Echizen, H. Yoshiura, K. Anzai, Y. Kurosu: Method of extracting digital watermark information and method of judging bit value of digital watermark information, US Patent No.6650763 (Issued: 2003/11/18).
- I. Echizen, H. Yoshiura, R. Sasaki, S. Harano, S. Eikawa: Digital watermark data embedding method, and digital watermark data embeddability analyzing method, US Patent No.7047412 (Issued: 2006/05/16), Korea Patent No.409164 (Issued: 2003/11/28), China Patent No.1117314.9 (Issued: 2005/03/16)
- H. Yoshiura, I. Echizen, T. Arai, H. Kimura, T. Takeuchi, Y. Moriyama, K. Sugaya, A. Ogino: Control method and apparatus for embedding information in data, US Patent No.6711276 (Issued: 2004/03/23), Canada Patent No.2291383 (Issued: 2004/01/20), Australia Patent No.735422 (Issued: 2001/10/18), Taiwan Patent No.141791 (Issued: 2002/01/24), Vietnam Patent No.2837 (Issued: 2002/07/01), Korea Patent No.384959 (Issued: 2003/05/10), Russia Patent No.2219582 (Issued: 2003/12/20), China Patent No.99127723.6 (Issued: 2005/04/06), Hong Kong Patent No.1030706 (Issued: 2005/07/29), Singapore Patent No.80664 (Issued: 2005/03/31).
- H. Yoshiura, I. Echizen, J. Taguchi, H. Kimura, A. Maeda, T. Arai, T. Takeuchi: Method and system for embedding information into contents, US Patent No.6826291 (Issued: 2004/11/30), EU Patent No.901274 (Issued: 2004/04/07), Korea Patent No.332033 (Issued: 2002/03/27).
- I. Echizen, H. Yoshiura, M. Nakamura, T. Arai, T. Takeuchi: Water-mark embedding method and system, US Patent No.6728408(Issued: 2004/04/27), EU Patent No.901102 (Issued: 2004/11/24), Korea Patent No.282752 (Issued: 2000/11/30).
- I. Echizen, H. Yoshiura, R. Sasaki, S. Harano, S. Eikawa: Contents rendering control method, contents reproducing equipment, and contents distribution equipment, US Patent No.6865677 (Issued: 2005/03/08).
- I. Echizen, H. Yoshiura, Y. Kurosu, K. Anzai: Method of extracting digital watermark information and method of judging bit value of digital watermark information, US Patent No.6970575 (Issued: 2005/11/29).
- S. Itoh, K. Miyazaki, I. Echizen: Network system enabling transmission control, US Patent No.7047407 (Issued: 2006/05/16).
- K. Anzai, I. Echizen, H. Yoshiura, S. Eikawa: Method for embedding information and extracting the same, US Patent No.7065226 (Issued: 2006/06/20).
- I. Echizen, H. Yoshiura, H. Kimura, A. Fukushima, K. Anzai: Watermark information detection method, US Patent No.7113613 (Issued: 2006/09/26).
- H. Ukai, S. Hirasawa, K. Anzai, I. Echizen, H. Yoshiura, M. Okayama, S. Tago: Method and apparatus for using contents, US Patent No.7293294(Issued: 2007/11/06).
- K. Anzai, I. Echizen, H. Yoshiura: Method of detecting digital watermark information, US Patent No.7310428(Issued: 2007/12/18).
- I. Echizen, H. Yoshiura, K. Miyazaki, K. Anzai, J. Taguchi, K. Nakano, K. Okeya: Method and system for contents control, US Patent No.7478432(Issued: 2009/01/13).
- Y. Fujii, K. Nakano, I. Echizen, H. Yoshiura: Method of watermarking for binary images, US Patent No.7499565(Issued: 2009/03/03).
- 中野和典,田口順一,吉浦 裕,越前 功,黒須 豊「電子透かし画像の認証方法」,日本国特許3563270号(2004/06/11登録).
- 田口順一,吉浦 裕,越前 功,前田 章,荒井孝雄,竹内敏文「電子透かし画像処理方法」,日本国特許3570213号(2004/07/02登録).
- 吉浦 裕,越前 功,田口順一,前田 章,荒井孝雄,竹内敏文「画像処理方法およびそのプログラムが記憶された記憶媒体」,日本国特許3570236号(2004/07/02登録).
- 安細康介,越前 功,吉浦 裕,永川 忍 「コンテンツへの情報挿入及び検出方法」,日本国特許3671723号(2005/04/28登録).
- 越前 功,吉浦 裕,安細康介,黒須 豊「電子透かし情報の抽出方法および電子透かし情報のビット値判定方法」,日本国特許3678084号(2005/05/20登録).
- 吉浦 裕,越前 功,荒井孝雄,木村寛之,竹内敏文,守山義明,菅谷和実,荻野 晃「情報埋込み方法および装置」,日本国特許3698901号(2005/07/15登録).
- 安細康介,越前 功,吉浦 裕,永川 忍 「電子透かし情報の埋め込み方法および抽出方法」,日本国特許3706766号(2005/08/05登録).
- 越前 功,吉浦 裕,佐々木良一,原野紳一郎,永川 忍 「電子透かし情報の埋め込み方法、および、電子透かし情報の埋め込み可能性分析方法」,日本国特許3809323号(2006/05/26登録).
- 越前 功,吉浦 裕,中村雅文,荒井孝雄,竹内敏文 「デ-タ重畳方式とデータ再生方法、及び、情報埋め込み方法と情報読みだし方法」,日本国特許3902863号(2007/01/12登録).
- 越前 功,吉浦 裕,佐々木良一,原野紳一郎,永川 忍「コンテンツ配信システム、コンテンツ再生装置、コンテンツ配信装置および記憶媒体」,日本国特許3973346号(2007/06/22登録).
- 伊藤信治,宮崎邦彦,越前 功「送信制御可能なネットワ-クシステム」,日本国特許4051924号(2007/12/14登録).
- 藤井康広,中野和典,越前 功,吉浦 裕「二値画像用電子透かし方法」,日本国特許4193665号(2008/10/03登録).
- その他、公開、出願特許
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