摘要： 针对二值文本图像纹理丰富、信息隐藏量少和取值形式为二值的特点，提出了一种新的文本水印算法。该算法基于DWT，它将小波变换、量化和加密技术有机结合起来，并且在使用该算法提取水印时不需要原始二值文本图像，是一种盲水印算法。文章对加有水印的二值文本图像进行了网络传输中常见的加高斯噪声、JPEG压缩、几何图像剪切等攻击实验，试验表明，该算法有理想的鲁棒性和不可见性。

关键词: 二值图像, 数字水印, 鲁棒性

Abstract: Considering that the binary text images are featured complicated texture, little capability in date hiding and two values, the paper gives a novel algorithm. The algorithm is based on DWT, it is property combined with the technique of the quantization and the encryption. Without the original binary text images, the watermarking can be detected from the tested binary text images, so it is a blind watermark technique. Simulation results such as Gauassian noise, JPEG compression and images cropping demonstrate the invisibility and robustness of the proposed algorithm.

Key words: Binary image, Digital watermark, Robustness

中图分类号: 

• TN918