Image processing apparatus and method of processing image for reducing noise of the image
US8300120B2 · kind B2 · utility
2Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Sep 11, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Nov 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus calculates a smoothed value obtained by smoothing signal levels of a plurality of pixels including a processing target pixel in a local area of an input image and a feature amount representing an edge degree of the processing target pixel using a pre-noise reduction image obtained by reducing an impulse noise of the input image. The image processing apparatus weighted-adds a signal level of the processing target pixel and the smoothed value at a ratio corresponding to the feature amount and outputs the weighted-addition result as a signal level after noise reduction processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.