一种基于HVS的图像自适应盲水印算法

An Image Adaptive Blind Watermarking Algorithm Based on HVS

利用人眼视觉系统对背景亮度和纹理的掩盖特性,对小波变换后的系数进行分类,分类的结果是基于图像特征的。对二值水印图像预处理后,根据分类结果采用不同强度自适应的嵌入水印,嵌入采用奇偶判决法则。水印的提取不需要原始载体图像和原始水印图像。实验结果表明,此算法的不可觉察性很好,并对一些诸如中值滤波、JPEG有损压缩、附加高斯噪声、裁剪等各种图像处理攻击有较强的鲁棒性。

According to the background luminance and the texture mask characters of HVS the wavelet coefficients of carrier image is divided into different classes,and the classing result is based on the character of the image.Then after preprocessing the binary image watermark,with different embedding strength the watermark image is embedded by the rule of odd-even adjudgement.This algorithm can extract the watermark without the original carrier image and the original watermark image.The experimental results show that the algorithm is invisible and robust against some image processing such as median filtering?JPEG lossy compression?additive Gaussian noise?cropping attacks and so on.