一种基于整数小波变换的脆弱水印技术

该文提出了一种用于图像鉴定的脆弱水印方法。该方法利用小波变换提取图像的特征信息,采用Hash函数加密生成数字摘要作为脆弱水印,给出了整数小波域基于平移窗的多比特水印的非线性嵌入方案,并实现了脱离原图的高概率水印检测方法。实验结果表明这是一种行之有效的图像鉴定方法。

A Fragile Watermarking Technique Based on Integer Wavelet Transform

This paper proposes a fragile watermarking method for image authentication.In the method, the original image's feature is extracted using the wavelet transform and encrypted by the Hash function, so the watermark sequences are generated from the message digest. It realizes a nonlinear multiple bits embedding method based on a shifting window. This paper develops a secure detection algorithm without original image, the high probability detection ability is ensured. Experiments show the method is very useful for image authentication.