Kurato Maeno, Qibin Sun, Shih-Fu Chang, Masayuki Suto. New Semi-Fragile Image Authentication Watermarking Techniques Using Random Bias and Nonuniform Quantization. IEEE Transactions on Multimedia, 8(1):32-45, February 2006.
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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
Kurato Maeno
Qibin Sun 
Shih-Fu Chang
@article{maeno:tmm06,
Author = {Maeno, Kurato and Sun, Qibin and Chang, Shih-Fu and Suto, Masayuki},
Title = {New Semi-Fragile Image Authentication Watermarking Techniques Using Random Bias and Nonuniform Quantization},
Journal = {IEEE Transactions on Multimedia},
Volume = {8},
Number = {1},
Pages = {32--45},
Month = {February},
Year = {2006}
}
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