Performance of the proposed scheme under collage attack.

(a-1), (b-1) the original image; (a-2), (b-2) the corresponding image tampered by collage attack; (a-3), (b-3) the ground truth; (a-4), (b-4) the tamper detection result; (a-5), (b-5) the recovered image. * The images ‘windmill’, ‘camera’ in Fig 14 of our manuscript corresponds to the ‘windmill.tiff’(https://github.com/yooStella/GrayImageDatabase/blob/main/windmill.tiff), ‘cameraman.tiff’(https://github.com/yooStella/GrayImageDatabase/blob/main/cameraman.tiff) pictures labelled in this GitHub page.