Method and device for estimation of motions of image portions for moving image compression circuits
US6236679A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1997 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Dec 11, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method and device for estimation of the motion of a macroblock of pixels of a current image with respect to a reference window taken in a preceding image, including, in a first step, determining the cumulated distortion of the pixels of the current macroblock for a null motion vector in the reference window; choosing, as the motion vector of the current macroblock, the null vector if the distortion is lower than or equal to a first threshold; and otherwise choosing, in a second step, a vector for which the current macroblock exhibits a minimum distortion with respect to a macroblock of the reference window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.