Abstract:

This paper presents a novel semi-fragile watermark algorithm for image authentication and recovery. Watermark generation and watermark embedding are disposed in original image, and it needs no information about the original image or watermark when image is authenticating, so it increases the security and confidentiality of watermark. Experimental results show that the algorithm can distinguish intentional content tamper and incidental image processing well, and recover the content modified if image is tampered.

Key words: self-fragile watermark, image authentication, tamper recovery

摘要：

提出一种新的用于图像认证及恢复的半脆弱水印算法。该算法的水印生成和嵌入都在原图像中进行，图像认证时不需要原始图像和任何有关水印的附加信息，从而提高了水印的安全性和保密性。实验结果表明，该算法可较好地区分对图像内容的恶意篡改和可接受的一般图像处理，当图像内容被篡改时，可以给出篡改的位置并有效恢复被篡改的内容。

关键词: 半脆弱水印, 图像认证, 篡改恢复

CLC Number: 

• TP391