User adjustable image enhancement filtering
US7636488B2 · kind B2 · utility
6Cited by
0References
23Claims
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Key dates
| Filing date | Dec 18, 2003 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20092
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an image enhancement method, computer program product, and system a set of boundary frequencies within a frequency spectrum are defined. The boundary frequencies divide the spectrum into a plurality of different spatial frequency regions. A digital image is then processed with a filter having a plurality of functions. Each function is exclusive to one of the spatial frequency regions. The functions of adjoining regions have equal values at respective boundary frequencies. A set of peak and or valley filter values of the functions at the respective boundary frequencies can be defined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.