利用视觉掩蔽值的稳健水印认证算法

A robust watermarking authentication algorithm using the value of visual masking

提出一种稳健水印认证算法,它以人类视觉掩蔽值为量化阶,同时满足了稳健和不可感知性的要求,其安全性取决于隐藏密钥而非量化阶,量化阶可以公开,从而避免了利用人类视觉特性时常见的安全性问题.实验结果表明,该算法能够区分一般的图像处理操作和恶意篡改,而且对于恶意篡改还能根据水印误差图样给出被篡改的区域.

A robust watermarking authentication algorithm is proposed with the value of visual masking as the quantization size. The security depends on hiding keys rather than quantization sizes which now can be opened. Therefore, it avoids some security demerits when using human visual characteristics. Furthermore, our scheme is able to distinguish common image processing from malicious tampering, and even to indicate the area where the malicious tampering arises on the basis of the error image of watermarks.