A multi-metric objective picture-quality measurement model for MPEG video

Different coding schemes introduce different artifacts to the decoded pictu res, making it difficult to design an objective quality model capable of me asuring all of them. A feasible approach is to design a picture-quality mod el for each kind of known distortion, and combine the results from the mode ls according to the perceptual impact of each type of impairment. In this l etter, a multi-metric model comprising of a perceptual model and a blockine ss detector is proposed, designed for MPEG video, Very high correlation bet ween the objective scores from the model and the subjective assessment resu lts has been achieved.