Quality Assessment Of Image Features In Video Coding

This paper describes an extension of a vision model for video that has been designed to estimate how specific features in moving pictures are rendered as a consequence of a compression process. The resulting model permits to evaluate the distortions on contours and textures in a sequence, as well as to estimate how strong the blocking effect (resulting from a block-DCT compression scheme) is. The model has been used to evaluate feature rendition in MPEG-2 compressed sequences. Keywords: Quality assessment, vision model, MPEG, test, video 1. INTRODUCTION There has been, over the past few years, a growing interest in the field of test and measurement for digital video. The reason is that the recent developments in digital compression and communication techniques now make possible the release of a new generation of products using digital compression, such as the MPEG-1 and MPEG-2 standards. Consequently, the question on how these new devices and systems have to be tested became importan..