Mutual Support Dual Watermark Algorithm Based on Compressive Sensing
Wei Liu · Dianzi xuebao · 2012
Watermarking algorithms in general only have single function,and dual watermark algorithms have interference problems between the two watermarks.To address these issues,this paper proposes a mutual support dual watermark algorithm.Firstly embed robust watermark in the image,and then divided the image into blocks,extract measurement matrixes from the key of the robust watermark and observe each image block using these matrixes in accordance with the compressive sensing(CS) theory,the measurements are the semi-fragile watermark which will be registered as a zero-watermarking.The use of zero-watermarking can reduce the impact of visual effect on the original image by dual watermark,and effectively avoid the interference problems.The introduction of CS theory realizes the interaction between the two watermarks.On the one hand,the robust watermark provide measurement matrixes and secrecy support for the semi-fragile watermark,on the other hand,the semi-fragile watermark can Enhance the robust performance of the robust watermark and verify the authenticity of its key.