基于混沌序列的视频图像数字水印隐藏与多分辨检测

基于混沌序列的优良性能和视频信号多分辨小波表示的特点，提出了一种视频图像混沌水印隐藏及其多分辨检测方法，首先利用小波变换对图像进行多级分解；其次将混纯 数字水印叠加在从低分辨率到主分辨率的主频小波系数里；最后进行逆小波变换生成水印图像，其特点是混沌水印安全性能高，不易破译，可以进行多分辨检测，节约计算量，实验表明，对于觉的图像处理和噪声干扰，多分辨检测方法极能识别隐藏的水印，具有很好的鲁棒性，而且

Multiresolution Watermarking Scheme Based on Chaotic Sequences

A multiresolution watermarking scheme is developed that makes use of chaotic sequences and wavelet transform. The procedure involves decomposition of digital image by using wavelet transform. Chaotic sequence is added to all the high pass bands in the wavelet domain. Watermarked image is obtained by using reverse wavelet transform. When watermarked image is distorted from common image processing, it can still be identified. The method can be applied to video sequences using three dimensional wavelet transform.