基于整数小波变换和人眼视觉系统的可逆水印算法
Reversible Watermarking Algorithm Based on Integer Wavelet Transform and Human Visual System
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摘要: 提出了一种基于整数小波变换和人眼视觉系统的可逆水印算法.首先将宿主图像分块,结合人眼视觉系统计算出每块的视觉熵和边熵之和并进行排序,从而选择出合适的块进行水印信息的嵌入,并对选中的块进行整数小波变换,将水印嵌入到中低频子带的最低有效位上.实验结果表明,该算法完全可逆,并且方法简单,易于操作,具有可行性.Abstract: A reversible watermarking algorithm based on integer wavelet transform and human visual system is proposed in this paper.Firstly,the original image is divided into blocks,the sum of visual entropy and edge entropy of each block is computed;proper blocks are selected based on human visual system to have a good invisibility,then integer wavelet transform is performed on the selected blocks,the watermark embed in the middle and low frequency sub-bands by least significant bit.The experimental results show that the proposed method is reversible,simple and easy to realize.
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