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Fig. 2 | EURASIP Journal on Information Security

Fig. 2

From: Double JPEG compression forensics based on a convolutional neural network

Fig. 2

DCT coefficient histograms corresponding to the (0,1) position. a, b DCT coefficient histograms of a single-compressed image with a QF1 = 60 and b QF1 = 90. c, d DCT coefficient histograms of the same double-compressed image with c QF1 = 90, QF2 = 60, and d QF1 = 60, QF2 = 90

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