An Enhanced Scheme for Lossless Watermarking and Authentication in Halftone Image
碩士 === 輔仁大學 === 資訊工程學系 === 98 === Fragile watermarking is a technique can detect any alteration. Pan , Luo and Lu propose a watermark method which embed a digital signature by modifying block into halftone image. In “A Lossless Watermarking Scheme for Halftone Image Authentication” , it used origina...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/60962837674252973521 |
| Summary: | 碩士 === 輔仁大學 === 資訊工程學系 === 98 === Fragile watermarking is a technique can detect any alteration. Pan , Luo and Lu propose a watermark method which embed a digital signature by modifying block into halftone image. In “A Lossless Watermarking Scheme for Halftone Image Authentication” , it used original blocks and similar blocks to construct a lookup table. In this pager, we derive similar blocks by exchanging neighboring pixels and compute similar block’s “Score” to select the best similar blocks for generating the lookup table. This method increases the visual quality of embedded image.
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