科研之友
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摘要
Many digital-image watermarking schemes have been proposed over the last decade, but most of them have focused on robust, fragile or semi-fragile watermarking. This paper proposes a multi-purpose watermarking method that integrates robust, fragile and semi-fragile watermarking. Both authentication and watermark information are generated by discrete wavelet transform (DWT) and embedded into DWT sub-bands as a watermarked image. The authentication system verifies the copyright and integrity of images and locates modified parts of the received image as unauthentic. To improve the visual quality of watermarked images and e
- 出版日期2010-7
