Television – Image signal processing circuitry specific to television – Motion vector generation
Patent
1995-05-23
1997-08-05
Chin, Tommy P.
Television
Image signal processing circuitry specific to television
Motion vector generation
382241, H04N 732
Patent
active
056547714
ABSTRACT:
In a temporal sequence of digitized image frames of video signals, the spatial and temporal image gradients and the pixel-to-pixel motion vectors (dense motion vectors) are obtained between two consecutive image frames. A shape-adaptive triangular patch mesh model overlay is provided on the first image frame such that the location of node points of each patch is determined by the spatial image gradients of the first frame and the pixel-to-pixel motion vectors. A priority ranking of patches is established before determining the node point motion vectors. The node point motion vectors, representing the motion of each of the node points of the triangular mesh patches, are estimated by a linear least-squares solution to an affine transformation of the mesh overlay on the first frame into the second frame. Failure regions are identified and are revised in accordance with a data bit budget. All data are coded prior to transmission at a constant data bit rate by a sending unit to a receiving unit over a data link.
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Altunbasak Yucel
Bozdagi Gozde
Tekalp A. Murat
Chin Tommy P.
Lukacher K.
Lukacher M.
The University of Rochester
Tung Bryan S.
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