Picture quality assessment methods for digitally coded image

摘要

Distortion caused by digital video coding appears locally strongly content dependent and picture quality is time varying. Picture quality assessment methods for digitally coded image are becoming more important as digital audio-visual systems are widely being used. In this paper, the procedure of subjective testing used for the assessment, mainly the Double Stimulus Continuous Quality Scale (DSCQS) method, is illustrated. Following that, the status of the new technology for criticality measure and objective quality assessment is described.