標題: Wavelet based multipurpose color image watermarking by using dual watermarks with Human Vision System models
作者: Tsai, Min-Jen
Lin, Chih-Wen
資訊管理與財務金融系 註:原資管所+財金所
Department of Information Management and Finance
關鍵字: HVS;semi-fragile watermarking;tamper detection;visible watermarking
公開日期: 1-Jun-2008
摘要: In 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.
URI: http://dx.doi.org/10.1093/ietfec/e91-a.6.1426
http://hdl.handle.net/11536/8735
ISSN: 0916-8508
DOI: 10.1093/ietfec/e91-a.6.1426
期刊: IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
Volume: E91A
Issue: 6
起始頁: 1426
結束頁: 1437
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