Hits ?▲ |
Authors |
Title |
Venue |
Year |
Link |
Author keywords |
27 | Shiyu Li, Masahiro Okuda |
Watermarking for Progressive Human Motion Animation. |
ICME |
2007 |
DBLP DOI BibTeX RDF |
|
27 | Shiuh-Jeng Wang, Jian-Yi Lin, Hung-Jui Ke, Yao-Han Chang |
Targeted Secret Disclosures in Visual-based Watermarking Concealment Systems. |
MUE |
2007 |
DBLP DOI BibTeX RDF |
|
27 | Stefan Katzenbeisser 0001, Boris Skoric, Mehmet Utku Celik, Ahmad-Reza Sadeghi |
Combining Tardos Fingerprinting Codes and Fingercasting. |
Information Hiding |
2007 |
DBLP DOI BibTeX RDF |
|
27 | Li Zhang 0066, Ping-Ping Zhou, Gong-bin Qian, Zhen Ji |
A DWT Blind Image Watermarking Strategy with Secret Sharing. |
PCM |
2007 |
DBLP DOI BibTeX RDF |
blind image watermarking, secret sharing, closed loop, Stirmark |
27 | Tanmoy Kanti Das, Subhamoy Maitra |
Analysis of the "Wavelet Tree Quantization" watermarking strategy and a modified robust scheme. |
Multim. Syst. |
2006 |
DBLP DOI BibTeX RDF |
Cryptanalysis, Wavelet transform, Information security, Digital watermarking, Multimedia systems |
27 | Neri Merhav |
On joint coding for watermarking and encryption. |
IEEE Trans. Inf. Theory |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Lahouari Ghouti, Ahmed Bouridane, Mohammad K. Ibrahim, Said Boussakta |
Digital image watermarking using balanced multiwavelets. |
IEEE Trans. Signal Process. |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Oktay Altun, Gaurav Sharma 0001, Mehmet Utku Celik, Mark F. Bocko |
A Set Theoretic Framework for Watermarking and Its Application to Semifragile Tamper Detection. |
IEEE Trans. Inf. Forensics Secur. |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Oztan Harmanci, Vishal Monga, Mehmet Kivanç Mihçak |
Geometrically Invariant Image Watermarking via Robust Perceptual Hashes. |
ICIP |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Alper Koz, Cevahir Cigla, A. Aydin Alatan |
Free-View Watermarking for Free-View Television. |
ICIP |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Tomás Brandão, Tiago Rosa Maria Paula Queluz |
Towards Objective Metrics for Blind Assessment of Images Quality. |
ICIP |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Gaurav Gupta 0002, Josef Pieprzyk, Huaxiong Wang |
An attack-localizing watermarking scheme for natural language documents. |
AsiaCCS |
2006 |
DBLP DOI BibTeX RDF |
watermarking, permutation, copyright |
27 | Shikha Tripathi, R. C. Jain, V. Gayatri |
Novel DCT and DWT based Watermarking Techniques for Digital Images. |
ICPR (4) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Chin-Chen Chang 0001, Tung-Shou Chen, Hsien-Chu Hsia |
An ImageWatermarking Scheme Using Pattern Coding Technique. |
ICICIC (3) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Wang Liu, Sheng-He Sun |
Rotation, Scaling and Translation Invariant Blind Digital Watermarking for 3D Mesh Models. |
ICICIC (3) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Ping Chen, Yao Zhao 0001, Jeng-Shyang Pan 0001 |
Image Watermarking Robust to Print and Generation Copy. |
ICICIC (1) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Cheng-Ri Piao, Wei-zhong Fan, Dong-Min Woo, Seung Soo Han |
Robust Digital Image Watermarking Algorithm Using BPN Neural Networks. |
ISNN (2) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Dongeun Lee 0002, Taekyung Kim, Seongwon Lee 0001, Joon Ki Paik |
Genetic Algorithm-Based Watermarking in Discrete Wavelet Transform Domain. |
ICIC (1) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | JinHa Hwang, Jong-Weon Kim, Jong-Uk Choi |
A Reversible Watermarking Based on Histogram Shifting. |
IWDW |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Hongjie He, Jiashu Zhang, Heng-Ming Tai |
A Wavelet-Based Fragile Watermarking Scheme for Secure Image Authentication. |
IWDW |
2006 |
DBLP DOI BibTeX RDF |
the vector quantization attack, the transplantation attack, discrete wavelet transform (DWT), fragile watermarking |
27 | P. Vinod 0002, Gwenaël J. Doërr, Prabin Kumar Bora |
Assessing motion-coherency in video watermarking. |
MM&Sec |
2006 |
DBLP DOI BibTeX RDF |
motion coherency, oracle, video watermarking |
27 | Zhicheng Wei, Hao Li, Jufeng Dai, Sashuang Wang |
Image Watermarking based on Genetic Algorithm. |
ICME |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Yulin Wang, Jinxu Guo |
Blind Watermarking Via Pixel Modification with Regular Rule. |
ACCV (1) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Ta-Te Lu, Wei-Lun Hsu, Pao-Chi Chang |
Blind Video Watermarking for H.264. |
CCECE |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Yuan Yuan, Decai Huang, Duanyang Liu |
An Integer Wavelet Based Multiple Logo-watermarking Scheme. |
IMSCCS (2) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Shuhua Xiong, Jiliu Zhou, Kun He 0007, Fangnian Lang |
A Multipurpose Image Watermarking Method Based on Adaptive Quantization of Wavelet Coefficients. |
IMSCCS (1) |
2006 |
DBLP DOI BibTeX RDF |
Multipurpose watermarking, Discrete wavelet transform, Quantization index modulation |
27 | Mohsen Ashourian |
A new mixed spatial domain watermarking of three dimensional triangle mesh. |
GRAPHITE |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Chun-Hsien Chou, Kuo-Cheng Liu |
Performance Analysis of Color Image Watermarking Schemes Using Perceptually Redundant Signal Spaces. |
IIH-MSP |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Chin-Chen Chang 0001, Yung-Chen Chang, Jau-Ji Shen |
A Heuristic Method for Extracting Enhanced Watermarks from Digital Images. |
IIH-MSP |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Xiao-hua Qiao, Shuxun Wang, Quan Wen, Zhao Xu |
A Robust Watermarking Algorithm Adopting Double Embedding. |
IIH-MSP |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Jong-Wook Bae, Bo-Ho Cho, Sung-Hwan Jung |
A New Display-Capture Based Mobile Watermarking System. |
PSIVT |
2006 |
DBLP DOI BibTeX RDF |
Mobile watermarking, Display-capture, MMB (Mobile Merchandise Bond) service, MMB image generation, Image distortion |
27 | Tomás Brandão, Tiago Rosa Maria Paula Queluz |
Blind PSNR Estimation of Video Sequences, Through Non-uniform Quantization Watermarking. |
ICIAR (1) |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Li Li 0014, Zhigeng Pan, Shusen Sun |
A Blind Watermarking Algorithm for Animation Used in Digital Heritage. |
Edutainment |
2006 |
DBLP DOI BibTeX RDF |
|
27 | Chowdary Adsumilli, Mylène Christine Queiroz de Farias, Sanjit K. Mitra, Marco Carli |
A robust error concealment technique using data hiding for image and video transmission over lossy channels. |
IEEE Trans. Circuits Syst. Video Technol. |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Stefanos Zafeiriou, Anastasios Tefas, Ioannis Pitas |
Blind Robust Watermarking Schemes for Copyright Protection of 3D Mesh Objects. |
IEEE Trans. Vis. Comput. Graph. |
2005 |
DBLP DOI BibTeX RDF |
3D mesh watermarking, copyright protection, blind watermarking |
27 | Gui Xie, Hong Shen 0001 |
Toward improved wavelet-based watermarking using the pixel-wise masking model. |
ICIP (1) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Balaji Venkatachalam |
Software Watermarking as a Proof of Identity: A Study of Zero Knowledge Proof Based Software Watermarking. |
IWDW |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Min-Su Kim, Sébastien Valette, Ho-Youl Jung, Rémy Prost |
Watermarking of 3D Irregular Meshes Based on Wavelet Multiresolution Analysis. |
IWDW |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Camélia Constantin, David Gross-Amblard, Meryem Guerrouani |
Watermill: an optimized fingerprinting system for highly constrained data. |
MM&Sec |
2005 |
DBLP DOI BibTeX RDF |
semantic integrity constraints, usability constraints, XML, relational databases, watermarking, fingerprinting |
27 | Hao-Tian Wu, Yiu-ming Cheung |
A fragile watermarking scheme for 3D meshes. |
MM&Sec |
2005 |
DBLP DOI BibTeX RDF |
dither modulation, mesh authentication, mesh centroid, fragile watermarking, tampering detection |
27 | Xiaoyun Wu, Hongmei Liu 0001, Jiwu Huang |
Semi-fragile Watermarking Based on Zernike Moments and Integer Wavelet Transform. |
KES (2) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Ping Chen, Kagenori Nagao, Yao Zhao 0001, Jeng-Shyang Pan 0001 |
Print and Generation Copy Image Watermarking Based on Spread Spectrum Technique. |
KES (2) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Toshio Modegi |
Development of Nearly Lossless Embedding Technology of Contactless Sensible Watermarks for Audio Signals. |
KES (2) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Foo Say Wei, Xue Feng, Li Mengyuan |
A blind audio watermarking scheme using peak point extraction. |
ISCAS (5) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Kaliappan Gopalan |
Robust watermarking of music signals by cepstrum modification. |
ISCAS (5) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Hongmei Liu 0001, Fenglian Shao, Jiwu Huang |
A MPEG-2 Video Watermarking Algorithm with Compensation in Bit Stream. |
DRMTICS |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Suk Hwan Lee, Ki-Ryong Kwon |
Watermarking for 3D Mesh Model Using Patch CEGIs. |
ICCSA (2) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Yu-Cheng Fan, Hen-Wai Tsao |
A Dual Pyramid Watermarking for JPEG-2000. |
AINA |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Neri Merhav |
On Joint Coding for Watermarking and Encryption. |
Information Hiding |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Daesung Moon, Taehae Kim, Seunghwan Jung, Yongwha Chung, Kiyoung Moon, Dosung Ahn, Sang-Kyoon Kim |
Performance Evaluation of Watermarking Techniques for Secure Multimodal Biometric Systems. |
CIS (2) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Hae-Yeoun Lee, Choong-Hoon Lee, Heung-Kyu Lee, Jeho Nam |
Feature-Based Image Watermarking Method Using Scale-Invariant Keypoints. |
PCM (2) |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Su-Young Han, Eui-Hyun Jung, Seong-Yun Cho |
A Robust Digital Watermarking Adopting 2D Barcode. |
CAIP |
2005 |
DBLP DOI BibTeX RDF |
|
27 | Shih-Hao Wang, Yuan-Pei Lin |
Wavelet tree quantization for copyright protection watermarking. |
IEEE Trans. Image Process. |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Beatriz Corona-Ramirez, Mariko Nakano-Miyatake, Héctor M. Pérez Meana |
Adaptive Watermarking Algorithm for Binary Image Watermarks. |
AWIC |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Yonggang Fu, Runnin Shen, Liping Shen |
Digital watermarking based on locally linear embedding. |
ICIP |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Yulin Wang, Alan Pearmain |
Blind mpeg-2 video watermarking robust against scaling. |
ICIP |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Yongsu Park, Yookun Cho |
An Efficient Pointer Protection Scheme to Defend Buffer Overflow Attacks. |
PARA |
2004 |
DBLP DOI BibTeX RDF |
randomization, buffer overflow, system security |
27 | Wei Lu 0001, Hongtao Lu, Ruimin Shen |
Color Image Watermarking Based on Neural Networks. |
ISNN (2) |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Jae-Won Cho, Min-Su Kim, Rémy Prost, Hyun-Yeol Chung, Ho-Youl Jung |
Robust Watermarking on Polygonal Meshes Using Distribution of Vertex Norms. |
IWDW |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Chun-Hsiang Huang, Chih-Hao Shen, Ja-Ling Wu |
Fidelity-Controlled Robustness Enhancement of Blind Watermarking Schemes Using Evolutionary Computational Techniques. |
IWDW |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Huayin Si, Chang-Tsun Li |
Fragile watermarking scheme based on the block-wise dependence in the wavelet domain. |
MM&Sec |
2004 |
DBLP DOI BibTeX RDF |
non-deterministic block-wise dependence, selective embedding algorithm, fragile watermarking, multimedia security |
27 | Michael Voigt, Bian Yang, Christoph Busch 0001 |
Reversible watermarking of 2D-vector data. |
MM&Sec |
2004 |
DBLP DOI BibTeX RDF |
DCT, vector data, reversible watermarking |
27 | Jianyong Huang, Changsheng Yang |
Image digital watermarking algorithm using multiresolution wavelet transform. |
SMC (3) |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Won-Hyuck Choi, Hye-jin Shim, Jung-Sun Kim |
Effective Digital Watermarking Algorithm by Contour Detection. |
ICCSA (4) |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Tanmoy Kanti Das, Subhamoy Maitra |
Cryptanalysis of "Wavelet Tree Quantization" Watermarking Scheme. |
IWDC |
2004 |
DBLP DOI BibTeX RDF |
Cryptanalysis, Wavelet Transform, Information Security, Digital Watermarking, Multimedia Systems |
27 | Lisha Sun, Weiling Xu, Zhancheng Li, Minfen Shen, Patch Beadle |
Effective Approach for Detecting Digital Image Watermarking via Independent Component Analysis. |
Australian Conference on Artificial Intelligence |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Kyu-Tae Kim, Jong-Weon Kim, Jung-Soo Lee, Jong-Uk Choi |
Holographic ImageWatermarking for Secure Content.. |
TrustBus |
2004 |
DBLP DOI BibTeX RDF |
|
27 | Jae-Gwi Choi, Kouichi Sakurai, Ji-Hwan Park |
Does It Need Trusted Third Party? Design of Buyer-Seller Watermarking Protocol without Trusted Third Party. |
ACNS |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Ji-Young Moon, Yo-Sung Ho |
A Video Watermarking Algorithm Based on the Human Visual System Properties. |
ISCIS |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Yuei-Lin Chiang, Lu-Ping Chang, Wen-Tai Hsieh, Wen-Chih Chen |
Natural Language Watermarking Using Semantic Substitution for Chinese Text. |
IWDW |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Jae-Won Cho, Ha-Joong Park, Young Huh, Hyun-Yeol Chung, Ho-Youl Jung |
Echo Watermarking in Sub-band Domain. |
IWDW |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Won Young Hwang, Hwan Il Kang, Seung-Soo Han, Kab Il Kim, Hwan Soo Kang |
Robust Audio Watermarking Using Both DWT and Masking Effect. |
IWDW |
2003 |
DBLP DOI BibTeX RDF |
|
27 | In-Gook Chun, Sangho Ha |
A Watermarking Method for Halftone Images Based on Iterative Halftoning Method. |
EC-Web |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Charalampos Laftsidis, Anastasios Tefas, Nikos Nikolaidis 0001, Ioannis Pitas |
Robust multibit audio watermarking in the temporal domain. |
ISCAS (2) |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Henry D. Knowles, Dominique A. Winne, Cedric Nishan Canagarajah, David R. Bull |
Towards tamper detection and classification with robust watermarks. |
ISCAS (2) |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Sung-kwan Je, Chang-jin Seo, Jin-Young Lee, Eui-Young Cha |
Self-organizing Coefficient for Semi-blind Watermarking. |
APWeb |
2003 |
DBLP DOI BibTeX RDF |
|
27 | Jengnan Tzeng, Wen-Liang Hwang, I-Liang Chern |
Enhancing image watermarking methods with/without reference images by optimization on second-order statistics. |
IEEE Trans. Image Process. |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Wenbin Luo, Gregory L. Heileman, Carlos E. Pizano |
Fast and Robust Watermarking of JPEG Files. |
SSIAI |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Feng-Hsing Wang, Lakhmi C. Jain, Jeng-Shyang Pan 0001 |
A Multi-user Based Watermarking System with Two-Security-Level Keys. |
IWDW |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Dan Yu, Farook Sattar |
A New Blind Watermarking Technique Based on Independent Component Analysis. |
IWDW |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Guenole C. M. Silvestre, Neil J. Hurley, Teddy Furon |
Robustness and Efficiency of Non-linear Side-Informed Watermarking. |
Information Hiding |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Yong Hun Kim, Hwan Il Kang, Kab Il Kim, Seung-Soo Han |
A Digital Audio Watermarking Using Two Masking Effects. |
IEEE Pacific Rim Conference on Multimedia |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Chip-Hong Chang, Zhi Ye, Mingyan Zhang |
Fuzzy-ART based digital watermarking scheme. |
APCCAS (1) |
2002 |
DBLP DOI BibTeX RDF |
|
27 | Gerhard C. Langelaar, Reginald L. Lagendijk |
Optimal differential energy watermarking of DCT encoded images and video. |
IEEE Trans. Image Process. |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Mauro Barni, Franco Bartolini, Alessandro Piva |
Improved wavelet-based watermarking through pixel-wise masking. |
IEEE Trans. Image Process. |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Srdjan Stankovic, Igor Djurovic, Ioannis Pitas |
Watermarking in the space/spatial-frequency domain using two-dimensional Radon-Wigner distribution. |
IEEE Trans. Image Process. |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Yong-Seok Seo, Min-Su Kim, Ha-Joong Park, Ho-Youl Jung, Hyun-Yeol Chung, Young Huh, Jae-Duck Lee |
A secure watermarking for JPEG-2000. |
ICIP (2) |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Changsheng Xu, Yongwei Zhu, David Dagan Feng |
A Robust And Fast Watermarking Scheme For Compressed Audio. |
ICME |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Jui-Cheng Yen |
Watermarks embedded in the permuted image. |
ISCAS (2) |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Guoxiang Song, Weiwei Wang |
Image-Feature Based Second Generation Watermarking in Wavelet Domain. |
WAA |
2001 |
DBLP DOI BibTeX RDF |
wavelet transform, digital watermarking, image feature |
27 | Ji-Hwan Park, Sook Ee Jeong, Young Huh |
A New Digital Watermarking for Text Document Images Using Diagonal Profile. |
IEEE Pacific Rim Conference on Multimedia |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Xiaochen Bo, Lincheng Shen, Wensen Chang |
Sign Correlation Detector for Blind Image Watermarking in the DCT Domain. |
IEEE Pacific Rim Conference on Multimedia |
2001 |
DBLP DOI BibTeX RDF |
|
27 | Ruizhen Liu, Tieniu Tan |
Content-Based Watermarking Model. |
ICPR |
2000 |
DBLP DOI BibTeX RDF |
|
27 | Rajarathnam Chandramouli, Nasir D. Memon |
A distributed detection framework for Steganalysis. |
ACM Multimedia Workshops |
2000 |
DBLP DOI BibTeX RDF |
watermarking, Steganography, information hiding, fusion, Steganalysis, covert channels, distributed detection |
27 | Minoru Kuribayashi, Hatsukazu Tanaka |
A Watermarking Scheme Based on the Characteristic of Addition among DCT Coefficients. |
ISW |
2000 |
DBLP DOI BibTeX RDF |
|
27 | Yoonki Choi, Kiyoharu Aizawa |
Digital Watermarking using Inter-Block Correlation: Extension to JPEG Coded Domain. |
ITCC |
2000 |
DBLP DOI BibTeX RDF |
|
27 | Ingemar J. Cox, Joe Kilian, Frank Thomson Leighton, Talal Shamoon |
Secure spread spectrum watermarking for multimedia. |
IEEE Trans. Image Process. |
1997 |
DBLP DOI BibTeX RDF |
|
21 | Jungyeop Kim, Sungeon Hong |
Development of digital watermarking technology to protect cadastral map information. |
ICIS |
2009 |
DBLP DOI BibTeX RDF |
digital cadastral map, watermark key, security, robustness, topology, digital watermarking, copyright, one-way function, fidelity, vector data |
21 | Chaokun Wang, Jianmin Wang 0001, Ming Zhou, Guisheng Chen, Deyi Li |
ATBaM: An Arnold Transform Based Method on Watermarking Relational Data. |
MUE |
2008 |
DBLP DOI BibTeX RDF |
relational data watermark, Arnold transform |
21 | Rafiullah Chamlawi, Asifullah Khan, Adnan Idris |
Wavelet Based Image Authentication and Recovery. |
J. Comput. Sci. Technol. |
2007 |
DBLP DOI BibTeX RDF |
integer wavelet transform (IWT), authentication and self-recovery, discrete cosine transform (DCT), JPEG compression, semi-fragile watermark |