Adaptive filters and apparatus, methods, and systems for image processing
US7319797B2 · kind B2 · utility
11Cited by
7References
36Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Mar 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adaptive filter according to one embodiment includes an N×N two-dimensional convolution, where N is an odd integer greater than one. Pixels of an image are filtered by moving the N×N kernel across the image. At each pixel location, the kernel coefficients are determined by the image pixels within the N×N region, such that the kernel coefficients may change from one pixel location to the next. Such a filter may be implemented to use a lookup table to approximate a floating-point operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.