Light source type discriminating method, image forming method, method and apparatus for estimating light source energy distribution, and exposure amount determining method
US7206072B2 · kind B2 · utility
11Cited by
8References
17Claims
0Family size
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Key dates
| Filing date | Oct 6, 2003 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Sep 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/27
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The discriminating method utilizes first to third sensors respectively having spectral sensitivities corresponding to three primary colors and a fourth sensor having a spectral sensitivity that does not overlap the spectral sensitivities corresponding to the three primary colors as sensors constituting an image pickup system, and discriminates a light source type of a photographic light source by using information obtained by the first to fourth sensors. The image forming method corrects image data of an input image using the light source type discriminated by the above light source type discriminating method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.