Adaptive image filtering based on a distance transform
US7006255B2 · kind B2 · utility
25Cited by
10References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Nov 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reducing visual artifacts in reconstructed images. One embodiment of the method determines edge energy for each pixel in the image and then compares the edge energy for each pixel to a threshold, producing an edge map. A distance transform is then used to produce a filter map and a filter is applied to pixel in the image, such that the filter applied is dependent upon a filter map value for each pixel. An output value for each pixel is then produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.