Image processing method, image processing apparatus, and electronic camera
US7310448B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2003 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Oct 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An object of the present invention is to obtain an image photographed with an image-sensing device using a flash, in which the brightness of the image of the subject of the photograph is proper. An integrated value of brightness of a photographed image is obtained; a weighted evaluation value is calculated; contrast of the photographed image is obtained; a gain of an image signal is obtained by using the evaluation value after which, a suppression gain, by which a value of suppressing the gain fluctuates according to the contrast, is obtained in order to correct the brightness of a photographed subject to the proper brightness; a correction gain for making final corrections to an image by using the gain and the suppression gain is calculated; and the image signal is amplified by a gain adjustment circuit, thereby correcting the photographed image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.