New JPEG image authentication algorithm applied to multi-region tampering
适用于多区域篡改的JPEG图像认证算法

A new method of distilling m bits abstract from the binary information sequence with the length of 2m-1 was proposed based on the coset decomposing theory of correct error coding.An important conclusion was proved that distortion of image block mean caused by JPEG lossy compression has a maximal value;a new image pre-processing method based on the conclusion was introduced and analyzed.Based on those,a new image authentication algorithm based on digital signature was proposed.It can distinguish between JPEG...