White balance control apparatus and method, and image pickup apparatus
US7030913B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2002 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Sep 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A white balance control apparatus includes an evaluation value calculation circuit calculating and outputting evaluation values of color components of each of a plurality of regions of digital image data, a luminance conversion part converting the evaluation values of each of the regions into a luminance value, and a high-luminance weighting part converting the evaluation values of each of the regions into a base white balance control amount, calculating a non-weighted white balance control amount from the base white balance control amount and a weighted white balance control amount by performing weighting processing on the base white balance control amount by using the luminance value of each of the regions so that a region of higher luminance has a greater weight, and calculating a white balance control amount to be applied to the image data at a time of image recording by using the weighted and non-weighted white balance control amounts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.