Image processing apparatus using a pixel-by-pixel motion estimation based on feature points
US5638129A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1995 |
| Grant date | Jun 10, 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 and a previous frame, comprises: a feature point motion vector(MV) detector for detecting a first set of MVs for feature points; an edge point MV detector for, in each of the edges, detecting one or two neighboring feature points for each of edge points, and determining a second set of MVs for the edge points; a quasi-point detector for detecting quasi-feature points and a third set of MVs therefor, and detecting quasi-edge points and a fourth set of MVs therefor; a non-quasi-point MV detector for detecting a fifth set of MVs for all non-quasi-points, each of the fifth set of MVs being determined by averaging the MVs of one or more neighboring quasi-feature points for each of the non-quasi-points; an arrangement block for arranging the third, the fourth and the fifth sets of MVs to determine a group of MVs for all of the pixels in the current frame; and a motion compensator for providing a pixel value from the previous frame based on the position data of each pixel in the current frame and a MV thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.