Method and apparatus for image processing
US7587089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2006 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Jan 20, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus comprises a characteristic value generator for receiving image data, analyzing neighboring pixels of a to-be-processed pixel and calculating characteristic values comprising average illumination, illumination variability and histogram of illumination of a local image; a weighting generator for generating first and second weightings according to the characteristic values, wherein the first weighting is inversely proportional to the average illumination and directly proportional to the illumination variability, and the second weighting is relative to the histogram of illumination and illumination of the to-be-processed pixel; a first/second modulated illumination generator for generating first/second modulated illumination according to the illumination of the to-be-processed pixel; and a computation unit for generating first and second weighting illumination according to the first and second weightings and the first and second modulated illumination, and synthesizing the first and second weighting illumination together to output an image value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.