一种基于混沌和汉明码的数字图像篡改检测及修复算法

提出了一种基于混沌映射和汉明码的数字图像篡改检测及修复算法.该算法采用了目前在信道编码中广泛使用的编组码汉明码,将差错控制应用于图像认证和修复,并使用混沌映射保证算法的有效性和安全性.分析及实验表明:该算法在保证良好的视觉效果,嵌入较少认证信息的前提下,可以有效地进行数字图像篡改检测,并能够完成一定程度的图像修复.

A novel image authentication and recovery algorithm based on chaos and Hamming code

In this article, we propose an image authentication and a recovery algorithm based on chaos and Hamming code. In this algorithm, the Hamming code that is widely used in the channel coding is used, the error control is applied to the image authentication and recovery, and the validity and security of the algorithm are ensured by chaotic mapping. Analytical and experimental results show that the algorithm has a good visual effect and an effectively tampering detection ability with less embedding authentication information, at the same time the algorithm can recover a tampered image to some extent.