System and method for estimating motion between images
US7120195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2002 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Oct 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for estimating motion between images performs correlation of candidate image blocks of a target digital image with potential image blocks of a reference digital image, in which pixel values of the images have been quantized, to estimate displacements of the candidate image blocks between the reference and target digital images. The correlation process may include a technique for counting the number of particular type bits in binary words. The counting technique involves performing bit-wise AND operations using a pair of masking binary words to derive first and second resulting binary words, shifting the second resulting binary word by a predefined number of bits and summing the first resulting binary word and the shifted binary word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.