Statistical Fragile Watermarking Capable of Locating Individual Tampered Pixels
Statistical Fragile Watermarking Capable of Locating Individual Tampered Pixels
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DOI：
10.1109/lsp.2007.896436
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发表时间：
2007-09
影响因子：
3.9
通讯作者：
Xinpeng Zhang;Shuozhong Wang
中科院分区：
文献类型：
--
作者：
Xinpeng Zhang;Shuozhong Wang
在图像认证中，精确定位篡改像素的能力是期望的。我们提出了一种新的统计方案的脆弱水印，其中一组量身定制的认证数据的每个像素连同一些额外的测试数据被嵌入到宿主图像。在认证方面，检查像素及其对应的认证数据将揭示内容修改的确切模式。只要篡改区域不是太大，对应于篡改和原始像素的两个不同的概率分布可以被用来准确地识别篡改像素。
Capability of accurately locating tampered pixels is desirable in image authentication. We propose a novel statistical scheme of fragile watermarking, in which a set of tailor-made authentication data for each pixel together with some additional test data are embedded into the host image. On the authentication side, examining the pixels and their corresponding authentication data will reveal the exact pattern of the content modification. As long as the tampered area is not too extensive, two distinct probability distributions corresponding to tampered and original pixels can be used to exactly identify the tampered pixels.