一种基于人眼视觉特性的小波域图像水印方法

A Watermark Technique Based on HVS in the DWT Domain

提出了一种基于小波变换的图像水印嵌入方法,通过对原始水印置乱的预处理,运用人眼视觉掩蔽模型(HVS),增强了数字水印的安全性和隐蔽性,把水印嵌入到感觉重要的小波变换系数中,提高了水印的稳健性,并实现了水印的盲提取。实验结果表明,该算法对JPEG压缩、旋转、滤波、加噪等图像处理操作有很强的鲁棒性。

An algorithm based on wavelet transformation for digital watermark to embed into image is presented. By using the human visual system （HVS）, the difference between original image and watermarked image could hardly be recognized by human sight, and by scrambling, the security of watermark is improved, and by inserting digital watermark into the most important part of the wavelet transformation coefficients, it can improve the robustness of the watermark. The experimental results show that the algorithm is robust against some image processing such as JPEG compression, rotation, median filtering, noise and so on.