Motion vector search method and apparatus
US6380986B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | May 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/51
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of obtaining a motion vector in moving images is based on evaluation of computational results of searches made by matching a target template and a group of pixel blocks each having a same size as the target template. The steps include: 1) searching in a wide area and obtaining a reference vector to indicate an overall image movement; 2) searching in narrow areas centered about the reference vector for all templates in the target image, and obtaining a displacement vector for each template in relation to the reference vector; and 3) summing the reference vector and the displacement vector for each template, and assigning a computed result as a motion vector in each template.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.