Motion estimation
AssigneeKoninklijke Philips Electronics N.V.
InventorsErwin B. Bellers, Gerard De Haan
Life of this patent
Estimating the term…
Abstract
In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM2) between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, second vectors are estimated (ME, PM1) between an image with a second sub-sampling phase and an earlier image sub-sampled with a first subsampling phase, and the first and second vectors are combined (CD) to obtain output motion vectors (MV).
Claims8
A method of estimating motion vectors from sub-sampled video data, the method comprising the steps:
- recursively estimating, by means of a motion estimator and a first vector prediction memory, first vectors between a first current image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase;
- recursively estimating, by means of said motion estimator and a second vector prediction memory, second vectors between a second current image with the second sub-sampling phase and said first current image sub-sampled with the first sub-sampling phase;
- and
- combining said first and second vectors.
A device for estimating motion vectors from sub-sampled video data, the device comprising:
- a first vector prediction memory and a second vector prediction memory separate from said first vector prediction memory;
- means for recursively estimating, using said first vector prediction memory, first vectors between a first current image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, and for estimating, using said second vector prediction memory, second vectors between a second current image with the second sub-sampling phase and said first current image sub-sampled with the first sub-sampling phase;
- and
- means for combining said first and second vectors.
A device for estimating motion vectors from sub-sampled video data, the device comprising:
- means for estimating first vectors between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase;
- means for estimating second vectors between an image with the second sub-sampling phase and an earlier image sub-sampled with the first sub-sampling phase;
- and
- means for combining said first and second vectors, wherein said combining means sets an output vector y-component to zero in case the signs of respective y-components of said first and said second vectors differ.
A device for estimating motion vectors from sub-sampled video data, the device comprising:
- means for estimating first vectors between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase;
- means for estimating second vectors between an image with the second sub-sampling phase and an earlier image sub-sampled with the first sub-sampling phase;
- and
- means for combining said first and second vectors, wherein said combining means sets an output vector y-component to an even value in case values of respective y-components of said first and said second vectors lie close to, but on mutually different sides of said even value.
Dependencies are inferred from the claim text.