数字图像水印嵌入和提取的平稳小波变换方法

提出一种基于离散平稳小波变换的变换域的数字图像水印嵌入和提取算法。本算法先将数字水印图像进行置乱变换(Arnold变换),然后将置乱后的水印图像嵌入到平稳小波变换后的图像中,最后将提取出的水印图像进行Arnold反置乱变换得到原始水印图像。由于本算法选择了合适的水印嵌入位置,实验结果表明,该算法不但使水印具有很好的不可见性,而且所嵌入的水印对一般的图像处理如噪声、滤波、旋转、压缩等有很强的鲁棒性。

Embed and Extraction of Digital Image Watermarking Based on Stationary Wavelet Transform

This paper proposes one kind watermark-inserting algorithm based on the transformation territory.Firstly the digital watermarking is transformed randomly(the Arnold transformation).Then insertes the chaotic watermarking to the primitive image of stationary wavelet transform.Finally withdraw the watermarking and obtaines the primitive watermarking after the anti-Arnold transforming.Because this algorithm choses the appropriate position to insert the watermarking,the experiments indicates that this algorithm not only enabled the watermarking to have the very good invisibility,but also makes the watermarking have very strong robustness to the general imagery processinges like noise,filter,revolving,compression and so on.