Method and apparatus for fast block motion detection
US6983020B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2002 |
| Grant date | Jan 3, 2006 |
| Priority date | — |
| Expiry date | Jul 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/543
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, system, and/or apparatus for quickly detecting blocks or regions in an image whose pixels that can be coded efficiently by a pointer to the same block occurring in a reference image. The reference image is shared between an encoder and a corresponding decoder. One embodiment of the encoder quickly detects such blocks in an image by: (a) defining features such that substantially fewer features occur in an image than pixels, (b) correlating features in an image to a corresponding feature in the reference image, (c) estimating a displacement vector representative of the displacement of the correlated features, (d) estimating a seed point within the displaced block from which to grow the block, and (e) growing the displaced block to determine its size, shape, and/or dimensions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.