Abstract: A color image authentication algorithm is presented. Message of each pixel is convolution encoded by encoder. After the process of parity checking and block interleaving, redundant bits are offset embedded in the image. Tamper can be detected and restored in pixel-level without accessing original image. Experimental results show the authentication algorithm has good performance in tamper detection, localization and image reconstruction.

Key words: image authentication, convolution coding, tamper detection

摘要： 提出一种基于卷积码的彩色图像认证算法。对图像RGB颜色通道的高位比特进行卷积编码，把监督比特隐藏在低比特位中，实现对彩色图像的篡改检测和篡改定位，并保持编码后图像的不可感知性。编码后的图像可以在没有原始图像的情况下，在像素级别上对篡改进行检测和定位，并有一定的图像自恢复能力。实验结果表明，基于卷积码的彩色图像认证算法实现简单、性能可靠，编码后的图像具有很好的篡改检测、定位性能。

关键词: 图像认证, 卷积码, 篡改检测

CLC Number: 

• TP18