基于混沌与彩色图像亮度分量的双重水印算法

A dual digital watermarking on chaotic and luminance component of color image

健壮水印选择有意义的二值图像,将混沌系统对初值的极敏感特性与图像的亮度分量值相结合用于脆弱水印的构造.算法在健壮性水印的基础上加入脆弱水印,通过提高健壮水印的稳健性减小脆弱水印对其影响.实验结果表明,该算法对噪声、JPEG压缩、剪切等攻击具有较好的健壮性;脆弱水印对图像的篡改具有高度敏感性以及准确的篡改定位能力;两类水印提取均为盲提取.

We selected a meaningful binary image as the robust watermark for copyright authentication.The fragile watermark was made with the luminance component of color image.The fragile watermark was embedded after the robust watermark had been embedded.The influence of the fragile watermark on the robust watermark was reduced by the better robustness of the robust watermark.Experimental results showed that our algorithm can resist adding noise,compression,cutting,etc effectively.The fragile watermark had high sensitivity to image tampering,can exactly locate the tampering part also.Both robust watermark and fragile watermark can be extracted without original image.