Psychovisual measurement and distortion metrics for image sequences

A number of perceptual distortion measures have been developed for both still images and image sequences. Many of these measures, however, derive from visual experiments using stimuli quite unlike digital image coding artifacts. We present the results from six visual experiments characterizing human visual sensitivity to edge-like blocking artifacts under a number of spatiotemporal conditions, in an attempt to establish a firm experimental basis for a tuned perceptual distortion measure for blocking artifacts in image sequences.