A new forensics technology was proposed in order to improve the accuracy and recall rate vague of evidence tampering retouching techniques. By detecting the origin image’s naturally strong edges on attribute reduction rules built by energy ratio and information entropy, using edge preserving smoothing filter structure to enhanced fuzzy region and detect the image’s edges, designing artificial fuzzy membership function to compute every pixel’s fuzzy membership and use it to detect the origin image’s fuzzy edges, merging all the images and processing them through artificial collection of fuzzy membership, the accurately and clearly artificial fuzzy edges were obtained. Experimental results showed that the new algorithm gets a higher precision and recall rate, distinguishes artificial and natural blur better, and detects tampered region better.
