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dc.contributor.authorTsai, Min-Jenen_US
dc.contributor.authorLin, Chih-Wenen_US
dc.date.accessioned2014-12-08T15:11:23Z-
dc.date.available2014-12-08T15:11:23Z-
dc.date.issued2008-06-01en_US
dc.identifier.issn0916-8508en_US
dc.identifier.urihttp://dx.doi.org/10.1093/ietfec/e91-a.6.1426en_US
dc.identifier.urihttp://hdl.handle.net/11536/8735-
dc.description.abstractIn this study, we propose a complete architecture based on digital watermarking techniques to solve the issue of copyright protection and authentication for digital contents. We apply visible and semi-fragile watermarks as dual watermarks where visible watermarking is used to establish the copyright protection and semi-fragile watermarking authenticates and verifies the integrity of the watermarked image. In order to get the best tradeoff between the embedding energy of watermark and the perceptual translucence for visible watermark, the composite coefficients using global and local characteristics of the host and watermark images in the discrete wavelet transform (DWT) domain is considered with Human Vision System (HVS) models. To achieve the optimum noise reduction of the visibility thresholds for HVS in DWT domain, the contrast-sensitive function (CSF) and noise visible function (NVF) of perceptual model is applied which characterizes the global and local image properties and identifies texture and edge regions to determine the optimal watermark locations and strength at the watermark embedding stage. In addition, the perceptual weights according to the basis function amplitudes of DWT coefficients is fine tuned for the best quality of perceptual translucence in the design of the proposed watermarking algorithm. Furthermore, the semi-fragile watermark can detect and localize malicious attack effectively yet tolerate mild modifications such as JPEG compression and channel additive white Gaussian noise (AWGN). From the experimental results, our proposed technique not only improves the PSNR values and visual quality than other algorithms but also preserves the visibility of the watermark visible under various signal processing and advanced image recovery attacks.en_US
dc.language.isoen_USen_US
dc.subjectHVSen_US
dc.subjectsemi-fragile watermarkingen_US
dc.subjecttamper detectionen_US
dc.subjectvisible watermarkingen_US
dc.titleWavelet based multipurpose color image watermarking by using dual watermarks with Human Vision System modelsen_US
dc.typeArticleen_US
dc.identifier.doi10.1093/ietfec/e91-a.6.1426en_US
dc.identifier.journalIEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCESen_US
dc.citation.volumeE91Aen_US
dc.citation.issue6en_US
dc.citation.spage1426en_US
dc.citation.epage1437en_US
dc.contributor.department資訊管理與財務金融系 註:原資管所+財金所zh_TW
dc.contributor.departmentDepartment of Information Management and Financeen_US
dc.identifier.wosnumberWOS:000256862800017-
dc.citation.woscount11-
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