Method and apparatus for picture motion measurement
First Claim
1. A method of picture motion measurement comprising subdividing pictures into two or more regions and correlating corresponding regions of two pictures to determine correlation as a function of displacement thereby to determine from peak correlation values for each region a plurality of motion vectors, said method comprising the further steps of:
- (i) weighting motion vectors from regions of said sub-divided picture in dependence upon a given relative quantity of peaks in said correlation functions,(ii) individually summing those weighted motion vectors having corresponding coordinates from said regions of said sub-divided picture to produce a plurality of summed quantities each quantity relating to particular motion vector coordinates, and(iii) selecting the coordinates of a given number of the largest of said summed quantities to from the most dominant of said motion vectors.
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Abstract
Television pictures are divided up into a number of regions and corresponding regions for two pictures are correlated to produce motion vectors at an output connectrion (2) of a motion vector generator (1) which also at an output connection (4) produces signals signifying relative magnitude and/or width of the vectors which control the weighting operation of a weighting circuit (3). The weighted vectors are applied to a two-dimensional summing arangement (5) where corresponding vectors from the various regions are summed in individual stores. A largest vector selector (6) selects the most dominant of the motion vectors depending upon the quantities stored in the summing selector (6).
9 Citations
17 Claims
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1. A method of picture motion measurement comprising subdividing pictures into two or more regions and correlating corresponding regions of two pictures to determine correlation as a function of displacement thereby to determine from peak correlation values for each region a plurality of motion vectors, said method comprising the further steps of:
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(i) weighting motion vectors from regions of said sub-divided picture in dependence upon a given relative quantity of peaks in said correlation functions, (ii) individually summing those weighted motion vectors having corresponding coordinates from said regions of said sub-divided picture to produce a plurality of summed quantities each quantity relating to particular motion vector coordinates, and (iii) selecting the coordinates of a given number of the largest of said summed quantities to from the most dominant of said motion vectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. Apparatus for picture motion measurement comprising means for correlating corresponding regions of two pictures to determine correlation as a function of displacement to determine from peak correlation values for each region a plurality of motion vectors, characterized in that said apparatus additionally comprises means for weighting motion vectors from regions of said sub-divided picture in dependence upon given relative quantity of peaks in said correlation functions, means for individually summing those weighted motion vectors having corresponding coordinates from said regions of said sub-divided picture to produce a plurality of summed quantities each quantity relating to particular motion vector coordinates and means for selecting the coordinates of a given number of the largest of said summed quantities to form the most dominant of said motion vectors.
Specification