1. A method, comprising: partitioning a current input frame and a current degraded frame according to a tile grid, giving rise to a plurality of tile pairs, wherein the current degraded frame is generated from the current input frame according to a compression parameter value; calculating a quality score for each tile pair giving rise to a plurality of intra-tile quality scores; applying perceptual weighting to the plurality of intra-tile quality scores, giving rise to perceptually weighted intra-tile quality scores, including calculating a weight for a per-tile score based on a relation between the per-tile score and at least one other per-tile score; and pooling the perceptually weighted intra-tile quality scores to compute a quality score for the current degraded frame.