Passive detection of copy-paste forgery between JPEG images

A blind digital image forensic method for detecting copy-paste forgery between JPEG images was proposed. Two copy-paste tampering scenarios were introduced at first: the tampered image was saved in an uncompressed format or in a JPEG compressed format. Then the proposed detection method was analyzed and simulated for all the cases of the two tampering scenarios. The tampered region is detected by computing the averaged sum of absolute difference (ASAD) images between the examined image and a resaved JPEG compressed image at different quality factors. The experimental results show the advantages of the proposed method: capability of detecting small and/or multiple tampered regions, simple computation, and hence fast speed in processing.

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