Method conducting smoothing processing in a linear direction having a minimized magnitude of density change
US5561724A · kind A · utility
52Cited by
2References
20Claims
0Family size
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Key dates
| Filing date | Jun 10, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Jun 10, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A noise filtering method including the steps of calculating a magnitude E.sub.i of density change for each of a plurality of linear direction components i in a local region around each of pixels of an inputted two-dimensional image, detecting such a direction as to minimize the magnitude E.sub.i of density change, conducting smoothing processing by deriving an arithmetic mean of densities of pixels in the local region arranged in the detected direction, and thereby reducing noise of the inputted image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.