基于图像整数小波变换的盲数字水印嵌入算法

A blind watermarking algorithm based on image integer wavelet transform

提出了一种新的在静态图像中嵌入盲水印的算法.通过调整图像3个高频小波变换域的系数,使之对某个整数取模后的余数符合一定的规律,从而表示水印信息.本算法是一种非线性的算法,其优点是可以嵌入的水印数据量大,从信息隐藏的角度,可达2 b it/p ixe l或更多,且对图像的篡改敏感.算法的思想具有通用性,可以结合其他的图像变换和量化方法,达到预定的要求.

A new image blind watermarking algorithm is proposed in this paper. The coefficients in three high-frequency domains of integer wavelet transform of an image are adjusted, and they are divided by an integer, so the remainders accord with some rules are gotten and therefore the watermark is denoted. This idea is a non-linear algorithm. One of its advantages is high capacity to watermarking. From the hiding information point of view, the capacity can be 2 bit/pixel or more. The watermarking is very sensitive to content tampering. The algorithm is universal and can gain given result by combining other methods of image transform or quantization.