semi-fragile
1.Semi-Fragile Image Authentication Based on Zernike Moments and Watermark
2.Image Authentication Scheme Based on JPEG Invariant and Semi-fragile Watermarking
3.While inserting the semi-fragile mark, the key is also robustly embedded into the host.
4.However, it is possible to successfully attack a watermarking system by analyzing the common characteristics in different watermarked data containing semi-fragile watermark.
5.On this foundation, we attempted to built up a fragile watermarking algorithm according to the chaos system and a semi-fragile watermarking algorithm according to the invariant property to JPEG lossy compression, carried out the analysis to its experiment and proved the rationality of this algorithm.
6.4. We put forward an algorithm for semi-fragile watermarking of still image according to the invariant property to JPEG lossy compression and based on the invariant property to JPEG of the coefficient of DCT, which enables the real blind examination and provides good guarantee for the safety of the system to the control of the key at the same time;
