基于字体颜色的文本数字水印算法

Color-based Watermarking Algorithm for Text Documents

根据人眼对蓝色最不敏感的特性,提出了通过修改文本字符的蓝色成分使其嵌入水印信息的一种文本数字水印算法。理论分析及实验结果表明,该算法具有水印容量大、鲁棒性较强的特点,可以弥补当前文本数字水印算法存在的鲁棒性较差、水印容量小的缺点。它在电子文档的版权保护等领域有广泛的应用前景。

This article presents the watermarking algorithm for text documents which based on the feature that human＇s eye has the weakest sensitivity to the blue color by modifying the blue elements of chars to make watermarking information embed in text documents. And this kind of algorithm has the superiorities of huge watermarking capacity and strong robustness which can make up the weakpoints of the current situation of watermarking algorithm for text documents which are weak robustness and small watermarking capacity according to theoretical analysis and the outcome of the test. The algorithm therefore has a promising prospect of wide use in the fields of the copyright protection of the electronic text documents etc.