Dynamic chain-based thresholding using local characteristics
US6947605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Oct 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
One embodiment relates to an apparatus for image processing. The apparatus includes a candidate edge chain identifier for identifying candidate edge chains in an image being processed, means for calculating a dynamic chain-based threshold function that is dependent on at least one characteristic of the image being processed, and a threshold applicator for applying the dynamic chain-based threshold function to the candidate edge chains. The characteristic of the image being processed may be local in that it is calculated from the vicinity of each candidate chain. A system may include an encoder or a decoder, both of which include the above apparatus. Another embodiment relates to a method for image processing. The method determines a dynamic chain-based threshold function that is dependent on at least one characteristic of the image being processed and applies the dynamic threshold to a candidate edge chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.