一种基于数字签名的二值图像认证算法

为了实现对二值文本图像内容的全面保护，提出一种新的基于数字签名的二值图像认证算法。算法用数字签名实现对均匀块的认证，用归一化预处理实现对非均匀块的认证，通过两者联合认证来消除虚警。理论分析和实验结果表明，该算法仅需要附加极短的签名信息，就可以实现对二值文本图像内容的全面保护，在保证良好视觉效果的前提下，具有良好的窜改检测和窜改定位能力。

Binary image authentication algorithm based on digital signature

This paper proposed a new binary image authentication algorithm based on digital signature for protecting binary image completely. It used the digital signature to certificate the uniform blocks and used the normalization pretreatment to certificate the non-uniform blocks. False alarms could be eliminated by joint certification. The experiments and the analysis show that the content of binary text images can be protected completely by appending very short digital signature to the original image. With fine v...