一种可抗二值化攻击的文本图像可见水印算法

一些在文本图像中嵌入可见水印标识的方法会在二值化攻击下完全失效，因此提出一种基于灰度均匀分布的文本图像可见水印算法。该算法通过对二值水印图像的黑色像素进行概率筛选来控制水印的嵌入强度，然后将二值文本图像和筛选后的水印图像映射到相同的灰度分布范围，以得到含可见水印标识的文本水印作品。仿真实验表明，该算法生成的文本图像可见水印作品灰度均匀分布，能够抵抗二值化攻击，具有良好的鲁棒性。

Novel visible watermarking of text image reject against binarization attack

Some text image visible watermark algorithms will be destroyed by the binarization attack. Therefore, a novel visible watermarking of text image based on the uniform distribution of gray level was proposed. The probability filtering technique was applied to control the embedding intensity of visible watermark while the text image and watermark were mapped into the same gray range. Being experimented with the visible watermarked object, it reveals that this watermarking is of uniform distribution of gray level which helps reject to binarization attack and obtain good robustness.