Estimation of primary quantization matrix for steganalysis of double-compressed JPEG images

@inproceedings{Pevn2008EstimationOP,
  title={Estimation of primary quantization matrix for steganalysis of double-compressed JPEG images},
  author={Tom{\'a}s Pevn{\'y} and Jessica J. Fridrich},
  booktitle={Security, Forensics, Steganography, and Watermarking of Multimedia Contents},
  year={2008}
}
A JPEG image is double-compressed if it underwent JPEG compression twice, each time with a different quantization matrix but with the same 8 × 8 grid. Some popular steganographic algorithms (Jsteg, F5, OutGuess) naturally produce such double-compressed stego images. Because double-compression may significantly change the statistics of DCT coefficients, it negatively influences the accuracy of some steganalysis methods developed under the assumption that the stego image was only single… CONTINUE READING
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