Nixon & Vanderhye PC
Method and system for estimating global motion in video sequences
The invention relates to estimating the global motion between frames of a motion-compensated inter-frame encoded video sequence, directly from the motion vectors encoded within the frames. For any particular frame, a motion estimation is determined from motion vectors direct from the frame's anchor frame to the frame in question. This motion estimation is then checked against pre-determined criteria, and where the criteria are not met, re-estimation along a different route is performed, using the bi-directional motion vectors contained within B-frames. A panoramic image generating method and system which makes uses of the global motion estimations thus obtained is also described.
British Telecommunications public limited company
H H G H G G
H04N H04N G06T H04N G06T G06T
inventional inventional inventional inventional inventional inventional
Yongmin David G Li-Qun Charles Jason
Li Morrison Xu Nightingale Morphett