一种自适应图象水印算法

AN ADAPTIVE IMAGE WATERMARKING ALGORITHM

数字水印作为数字媒体版权保护的有效办法，近年来在国际上引起了人们极大的兴趣与注意．提出了一个利用块分类的自适应图象水印算法．为了实现自适应，将原始图象分块并设计了一个基于视觉掩蔽特性的分类器．根据分类的结果，不同强度的水印分量被嵌入到不同图象块的ＤＣＴ低频系数中．实验结果表明，应用所提出的算法实现的水印对常见图象处理和噪声干扰具有很好的稳健性．

As an effect method to provide copyright protection for digital media,digital watermarking has drawn extensive attention recently.This paper proposes an adaptive image watermarking based on block classification.The algorithm splits the original image into blocks and classifies these blocks based on visual masking.Watermark components with different strength are inserted into some DCT coefficients according to the classification.The experimental results demonstrate that the watermarks generated with the proposed algorithm are invisible and robust against noise and commonly used image processing techniques.