Method of and apparatus for segmenting a pixellated image
US6819796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2000 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a method for segmenting a pixellated image, comprising: (a) selecting at least one first region from a first reference image; (b) deriving from values of pixels of the at least one first region a first threshold such that a first predetermined proportion of the pixels have values on a first side of the first threshold; (c) forming a difference image as a difference between each pixel of the image and a corresponding pixel of an image of a non-occluded background; and (d) allocating each difference image pixel to at least one first type of region if the value of the difference image pixel is on the first side of the first threshold and the values of more than a first predetermined number of neighboring difference image pixels are on the first side of the first threshold. An apparatus for performing the foregoing method is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.