一种基于小波域特征树量化的数字水印算法*

首先使用尺度交互式特征检测算法提取图像小波域逼近子图的特征点，然后构造相应的特征树，最后对特征树所有节点进行量化以嵌入二值水印信息。水印信息嵌入到图像的特征之中，对JPEG，JPEG 2000以及高斯白噪音等多种处理具有较强的鲁棒性。

A Novel Watermarking Algorithm Based on Feature Tree Quantization

The feature points in the lowest approximation of the original image are extracted with the scale interaction model for feature detection and the feature tree is created corresponding to these feature points. Then the binary watermark bits are embedded by feature tree quantization. The watermark are robust to many processing such as JPEG, JPEG 2000 and Gaussian noise because the watermark bits are inserted into the features of image.