Novel visible watermarking of text image reject against binarization attack
一种可抗二值化攻击的文本图像可见水印算法

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.