METHOD AND APPARATUS FOR ESTIMATING MOTION HOMOGENEITY FOR VIDEO QUALITY ASSESSMENT

摘要

When a scene moves homogeneously or fast, human eyes become sensitive to freezing artifacts. To measure the strength of motion homogeneity, a panning homogeneity parameter is estimated to account for isotropic motion vectors, for example, caused by camera panning, tilting, and translation, a zooming homogeneity 5 parameter is estimated for radial symmetric motion vectors, for example, caused by camera zooming, and a rotation homogeneity parameter is estimated for rotational symmetric motion vectors, for example, caused by camera rotation. Subsequently, an overall motion homogeneity parameter is estimate based on the panning, zooming, and rotation homogeneity parameters. A freezing distortion factor can then 10 be estimated using the overall motion homogeneity parameter. The freezing distortion factor, combined with compression and slicing distortion factors, can be used to estimate a video quality metric.