Global motion estimation technology based on MPEG

A global motion estimation technology based on MPEG was put forward. First, a four-parameter model, which is used to describe the global motion yielde d by camera motion, was proposed. Then these parameters were obtained by us ing an algorithm which is based on block-matching, and the global motion co uld be compensated by these four parameters. Since the motion vectors inclu de the information of the optimum match-blocking, these information can be used without completely decoding the MPEG video sequence. The experiment sh ows that the algorithm is fast, and feint motion field can be excluded by g lobal motion compensation.