脊波域的图像数字水印算法研究

提出一种将混沌置乱加密后的水印信息嵌入到图像脊波变换域的算法。将图像分块后进行有限脊波变换,选择出图像纹理块的脊波域最大能量方向上的系数嵌入水印,水印提取只需要记录嵌入位置序列即可。实验结果表明,算法对噪声、压缩、不规则剪切、对比度等攻击有较强的鲁棒性。

Research on Image Digital Watermarking Algorithm in Ridgelet Transform Domain

Proposes an algorithm of embed the chaos encryption watermarking into image ridgelet transform region.The image is divided into blocks,and each block is transformed by finite ridgelet transformation,select the texture block of image,embed the watermark into the direction of the largest energy of ridgelet transform domain.Uses the embedding location serial,we can extract the original watermark.Experiment shows that the proposed algorithm has strong robustness on resist common attacks such as noise,compression,irregular cropping,filtering and contrast.