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JPEG compression and resampling operations appear frequently when image is tampered, hence the traces of JPEG compression and resampling are used to detect images. As JPEG compression and resampling operations affect the linear correlation between coefficients, so the traces of JPEG compression and the linear correlation are introduced when images are resampled and saved in JPEG format. Hence, the...
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...
In this paper, an effective steganalysis method based on Markov transition matrix is proposed to attacking the advanced JPEG steganographic schemes. As the horizontal and vertical scan modes failed to detect F5 steganography with low imbedding-rate, zigzag scanning pattern is developed to arrange both DCT (Discrete Cosine Transform) blocks and coefficients in each block. Difference computation was...
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