摘要： 提出一种新的图像水印嵌入算法，用Harris算子提取宿主图像的多个特征点，以选定的个别特征点为中心，形成互不重叠方形区域，并进行小波变换。将水印信息分别嵌入到特征点对应区域的小波低频系数中。实验结果表明，该算法的水印不可感知性较好，且可抵抗多种水印攻击，其中对JPEG压缩、几何剪切等攻击的鲁棒性较突出，可应用于图像的版权保护。

关键词: 数字水印, 特征点, 小波变换, 鲁棒性

Abstract: An image watermark embedding algorithm is presented. Harris operator is used to extract several feature points of the host image, about some of which non-overlapping square regions centres. Wavelet transform is done within the square regions and the watermark is embedded in the low-frequency coefficients. Experimental results show the algorithm has good transparency and better robustness, especially in JPEG compression and cropping attacks. It can be used for image copyright protection.

Key words: digital watermark, feature point, wavelet transform, robustness

中图分类号: 

• TN911.72