Image processing system/network which performs recognition process only upon regions having higher high spatial frequency content
US7333672B2 · kind B2 · utility
3Cited by
18References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Jul 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/255
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image recognition process applied to a photograph is preceded by a pre-processing step which identifies parts of the image which are in focus. The recognition process is then limited to those parts. The pre-processing typically operates by creating a measure of high spatial frequency activity and applying a threshold to them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.