Apparatus for estimating motion vectors for feature points of a video signal
US5760846A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1995 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Dec 27, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for determining a set of motion vectors for a set of feature points located on a contour of a moving object of a video signal comprises a contour displacement detection circuit for detecting a contour displacement range between a previous contour of the moving object contained in the previous frame and a current contour of the moving object contained in the current frame; and a feature point motion estimation circuit for comparing one of feature point blocks, having one of the feature points, with each of candidate blocks derived from a corresponding feature point search region adaptively regulated by the contour displacement range and for assigning a spatial displacements between one of the feature point block and a most similar candidate block thereto as a motion vector for a feature point corresponding to the one to thereby generating the set of motion vectors for the set of feature points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.