New semi-fragile image authentication watermarking techniques using random bias and nonuniform quantization
New semi-fragile image authentication watermarking techniques using random bias and nonuniform quantization
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DOI：
10.1117/12.465327
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发表时间：
2002-04
影响因子：
7.3
通讯作者：
K. Maeno;Qibin Sun;Shih-Fu Chang;Masayuki Suto
中科院分区：
文献类型：
--
作者：
K. Maeno;Qibin Sun;Shih-Fu Chang;Masayuki Suto
半脆弱水印技术旨在检测图像上的恶意操作，同时允许可接受的操作，如有损压缩。虽然这两种操作都被认为是像素值的变化，半脆弱水印应该是敏感的恶意操作，但鲁棒的有损压缩和其他定义的可接受的操作所引入的退化。在本文中，在研究了自然图像和恶意操作的特点，我们提出了两个新的半脆弱认证技术对有损压缩鲁棒性，使用随机偏置和非均匀量化，以提高Lin和Chang提出的方法的性能。
Semi-fragile watermarking techniques aim at detecting malicious manipulations on an image, while allowing acceptable manipulations such as lossy compression. Although both of these manipulations are considered to be pixel value changes, semi-fragile watermarks should be sensitive to malicious manipulations but robust to the degradation introduced by lossy compression and other defined acceptable manipulations. In this paper, after studying the characteristics of both natural images and malicious manipulations, we propose two new semi-fragile authentication techniques robust against lossy compression, using random bias and nonuniform quantization, to improve the performance of the methods proposed by Lin and Chang.