Hiding the Trace of JPEG Compression History

Identifying and disguising the JPEG compression history has become a hot research point in recent days. The image forger could easily get the JPEG images as tampering materials, while the JPEG loss compression left a big influence on the image´s DCT histogram. This JPEG compression trace has become an important standpoint of compression forensic. In order to fool the compression forensic, the anti-forensic dithers have been added into the JPEG compressed image and became an uncompressed image format. However, that kind of fake lossless image could be identified by measuring how ´noisy´ the uncompressed image is after recompressing. This paper would help the forger hide JPEG compression history by recompressing and adding noise at different quality factor and restore the image quality by TV denoising. It could defend forensic attack aiming at anti-forensic dither by measuring the total variation (TV) of the image. The simulation results have proved that it can fool the TV detection forensic with a high image quality.