In most practical situations, the compression or transmission of images and videos creates
distortions that will eventually be perceived by a human observer. Vice versa, image and
video restoration techniques, such as inpainting or denoising, aim to enhance the quality of
experience of human viewers. Correctly assessing the similarity between an image and an
undistorted reference image as subjectively experienced by a human viewer can thus lead
to significant improvements in any transmission, compression, or restoration system. This …