Image processing system using a pixel-by-pixel motion estimation based on feature points
US5627591A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1995 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Sep 13, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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 compe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.