一种可用于图像内容认证的数字水印算法

本文提出了一种新的基于小波变换的图像内容认证方法,它将有意义的二值图像作为水印图像,在图像中频系数中嵌入水印。这种水印属于脆弱盲水印,检测时不需要原始载体图像。实验表明,该算法可以有效地检测出恶意篡改及其发生的位置,并可容忍一定的压缩、滤波等图像处理操作引起的失真,对噪声也有一定的容忍度。

A Digital Watermarking Algorithm Using in Image Content Authentication

This paper proposes a new DWT-based algorithm using in image content authentication. It chooses a meaningful binary im-age as its watermark to be embedded, and it's embedded in the middle-frequency-component of the host image. The watermarking scheme belongs to fragile and blind watermarking, which doesn't need original host image to detect.The experiment proves that this authentication algorithm can effectively detect the event and the location when the host image content is tampered viciously, and it can stand some damage produced by noise and general image processing such as compression, filter etc.