Fig. 8From: Estimating Previous Quantization Factors on Multiple JPEG Compressed ImagesOverall accuracy of the proposed method on JPEG triple compressed images with high QF2 (90,95,98), patch size 256×256 and QF3=90, considering as ground truth (i.e., correct estimations) the quantization factors related to QF2 (a), QF1 (b) and both (c)Back to article page