Methods of estimating motion in image data and apparatus for performing same
US5793429A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | May 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods of estimating motion in image data include the steps of producing a first frame of image data from a received video signal containing information of an image data frame of higher predetermined resolution (e.g., 352.times.244 pixels) and producing a second image data frame of coarser resolution (e.g., 88.times.61 pixels) relative to the first image data frame. An estimate of motion in the second image data frame is then produced and used to determine a estimate of motion in the first image data frame of higher resolution. The estimate of motion in the first image data frame is then used to obtain an estimate of motion in the received image data frame of predetermined full resolution. The estimate of motion in the second image data frame can be determined by reading a plurality of motion vectors from an image block in a previous version of the second image data frame and reading image data in a reference block in a current version of the second image data frame. To obtain this estimate, an optimum motion vector is determined by predicting a plurality of motion vectors based on a corresponding plurality of motion models and selecting the best model and vector which yields the …
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