首页>
外国专利>
GLOBAL MOTION ESTIMATION AND COMPENSATION IN VIDEO COMPRESSION
GLOBAL MOTION ESTIMATION AND COMPENSATION IN VIDEO COMPRESSION
展开▼
机译:视频压缩中的全局运动估计和补偿
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method of video motion estimation is described for determining the dominant motion in a video image. The dominant motion is defined by a parametric transform, for example a similarity transform. In the preferred embodiment, selected pairs of blocks in one frame are traced by a block matching algorithm into a subsequent frame, and their change in position determined. From that information, an individual parameter estimate is determined. The process is repeated for many pairs of blocks, to create a large number of parameter estimates. These estimates are then sorted into an ordered list, the list is preferably differentiated, and the best global value for the parameter is determined from the differentiated list. One approach is to take the minimum value of the differentiated list, selected from the longest run of values which fall below a threshold value. Alternatively, the ordered list may be examined for flat areas, without explicit differentiation.
展开▼