一种基于可逆脆弱水印的图像认证算法

通过向图像嵌入水印,可实现图像的真伪鉴定。然而由于量化误差、信息嵌入及截断误差等原因,含水印图像在被确认为真实无误后,无法将原始图像恢复出来。采用可逆水印可以解决这一问题。该文提出了一种可逆脆弱水印算法,它可对图像进行真伪认证,并在图像通过认证后,恢复出原始图像。

An Image Authentication Algorithm based on Reversible Fragile Watermark

The authenticity of an image can be authenticated by embedding a watermark. Due to quantization error, information embedding or truncation error, the original image can not be restored from the watermarked image. The reversible watermarking technique solves this problem. In this paper, we propose a reversible fragile watermark authentication scheme for images. It can be used for image authentication. Furthermore, the original image can be recovered when the watermarked images is deemed to be authentic.