Movement estimation process and device in a moving picture sequence.

摘要

The process consists in estimating the movement by executing a gradient algorithm (2,3) which minimises the squared difference of the local variations of brightness of the current point of the picture with the point which is homologous to it in the preceding picture, in initialising (7) the execution of the algorithm by values of displacements estimated along several directions inside the near causal vicinity of the current point and by an initial vector for temporal prediction of the displacement between successive frames of the picture, then in propagating each estimation in the sense of the scanning of the lines of the picture. Application: high-definition digital television.