MSE period based estimation of first quantization step in double compressed JPEG images

作者：

Highlights：

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• A mean square error (MSE) sequence based approach is proposed for the first quantization step q1 estimation in double compressed JPEG images.

• A Histogram adjustment strategy is proposed to enhance the periodic effect.

• A strategy of histogram comparison is proposed to estimate q1 from the candidates.

• Experimental results demonstrate that the approach outperforms the state of the art.

摘要

•A mean square error (MSE) sequence based approach is proposed for the first quantization step q1 estimation in double compressed JPEG images.•A Histogram adjustment strategy is proposed to enhance the periodic effect.•A strategy of histogram comparison is proposed to estimate q1 from the candidates.•Experimental results demonstrate that the approach outperforms the state of the art.

论文关键词：Image forensics,Double compressed JPEG image,First quantization step estimation,Periodic fluctuation of the MSE sequence

论文评审过程：Received 14 March 2017, Revised 13 May 2017, Accepted 13 May 2017, Available online 17 May 2017, Version of Record 25 May 2017.

论文官网地址：https://doi.org/10.1016/j.image.2017.05.008