同时实现版权保护与内容认证的半易损水印方案

提出一种基于量化的半易损水印方案,能够在不参考原图的情况下对数字图像同时进行版权保护和内容真实性认证.本文算法一方面具有较好的鲁棒性,能够在水印图像遭受攻击以后仍然检测到图像的版权,另一方面具有较好的敏感性,既允许对水印图像进行一般性处理,又能检测并反映出水印图像被篡改的区域.实验结果表明本文算法在同时保护数字图像的版权和内容真实性方面是可行的.

Semi-Fragile Watermarking for Image Copyright Protection and Content Authentication

In this paper, we propose a quantization based semi fragile watermarking algorithm for copyright protection and content authentication simultaneously. The watermark can be blindly extracted for different applications in the detection process. Our scheme is robust to incidental manipulations while fragile to malicious distortions. The tampered area of a watermarked image can be reflected in the watermarking difference map. Experimental results show that the proposed semi fragile watermarking is effective for copyright protection and content authentication.