Quantization-Unaware Double JPEG Compression Detection

@article{Taimori2015QuantizationUnawareDJ,
  title={Quantization-Unaware Double JPEG Compression Detection},
  author={Ali Taimori and Farbod Razzazi and Alireza Behrad and Ali Ahmadi and Massoud Babaie-Zadeh},
  journal={Journal of Mathematical Imaging and Vision},
  year={2015},
  volume={54},
  pages={269-286}
}
The current double JPEG compression detection techniques identify whether or not an JPEG image file has undergone the compression twice, by knowing its embedded quantization table. This paper addresses another forensic scenario in which the quantization table of a JPEG file is not explicitly or reliably known, which may compel the forensic analyst to blindly reveal the recompression clues. To do this, we first statistically analyze the theory behind quantized alternating current (AC) modes in… CONTINUE READING

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