一种基于奇偶分解的小波域图像数字水印方案

Wavelet-domain Digital Watermarking Scheme Based on Parity-decomposition

提出了一种基于奇偶分解的小波域图像数字水印方案。该算法将图像水印按照位置进行奇偶分解,将原始图像进行3级小波分解的低频小波系数按照位置进行奇偶分解,选择重要系数作为嵌入区域,并利用人眼视觉隐蔽特性自适应地调节水印嵌入强度,将水印嵌入到相应的系数中。仿真实验证明,该算法简单易行,对JPEG压缩、滤波等攻击均具有良好的鲁棒性。

A wavelet- domain digital watermarking scheme based on parity -decomposition is proposed. The watermark image and the low - frequency part of the original image which is extracted from DWT are decomposed into 2 sequences respectively according to its odd/even location in the array, and the most important wavelet coefficients of odd and even sequences are selected respectively as watermarking embedding areas. The decomposed watermarking is embedded into corresponding embedding areas with visual masking effects of HVS. Experimental results show that the proposed scheme is easy to implement, and has good robustness to some hostile attack, such as JPEG compression, filtering.