Motion estimation block matching process and apparatus for video image processing
US5721595A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Jun 19, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/51
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for obtaining a motion vector for motion estimation used in a video image analysis, utilizing a block matching algorithm, which has the effect of reducing the computational load that is placed on the hardware logic used for implementation of the process. In a process of obtaining the absolute error value for the compared image block, a preliminary comparison is performed for every processed pixel in the image block to determine if the set minimum value of the absolute error function represented by a motionless tolerance constant is achieved. It is not necessary to obtain every actual value of the absolute error function. The block matching scheme of providing motion estimation enables hardware implementing the process to discontinue processing if the desired motion vector is selected prior to all image blocks being compared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.