Figure 6From: Detection of tampered region for JPEG images by using mode-based first digit features The detection of JPEG + JPEG manipulation with the original JPEG quality factor of the un-tampered region being equal to that of the inserted region; (a) Original image, (b) tampered image, (c–f) the detection results with i = 20, and n = 0, 1, 2, and 3, respectively. Back to article page