Image processing system using a pixel-by-pixel motion estimation

Details Image processing system using a pixel-by-pixel motion estimation Image processing system using a pixel-by-pixel motion estimation

1995-09-13

1997-05-06

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348699, H04N 736

Patent

active

056275919

ABSTRACT:
An apparatus, for use in a motion-compensated video signal encoder, for determining a predicted current frame based on a current frame and a previous frame, includes: a feature point motion vector detector for selecting a number of feature points among edge points in the previous frame and detecting a first set of motion vectors therefor; an edge point motion vector detector for detecting a second set of motion vectors for non-selected edge points; a quasi-point detector for detecting quasi-feature points and a third set of motion vectors, and quasi-edge points and a fourth set of motion vectors; a non-quasi-point motion vector detector for selecting one or more influential quasi-feature points for all non-quasi-points such that straight line drawn between each of the non-quasi-points and each of the corresponding one or more influential quasi-feature points intersects none of the quasi-feature and the quasi-edge points, and detecting a fifth set of motion vectors for the non-quasi-points; an arrangement block for arranging the third, the fourth and the fifth sets of motion vectors to determine a group of motion vectors for all of the pixels in the current frame; and a motion compensator for providing a pixel value from the previous frame based on a position of each pixel in the current frame and a motion vector thereof, to thereby determine the predicted current frame.

REFERENCES:
patent: 5546129 (1996-08-01), Lee

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