Fig. 2From: Double JPEG compression forensics based on a convolutional neural networkDCT 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 = 90Back to article page