灰度图像水印的自适应二维数字水印算法

本文提出了一种采用可视灰度图像作为水印信号,根据人类视觉掩体特性进行分类,并结合系数自身的特点,通过修改DCT域中低频和次低频系数来嵌入不同强度水印的算法。实验结果表明,应用所提出的算法实现的水印对常见图像处理和噪声干扰具有很好的稳健性。

A adaptive digital watermarking method for gray-level image watermarking in DCT

In the paper a new digital watermarking method based on human visual system and characters of coefficient of DCT is proposed. The gray-level image watermarking with different strength are embedded into low and sub-low frequency in DCT. The experimental results show that the watermarks generated with proposed method are invisible and robust against noise and commonly used image processing techniques.