Color imaging by independently controlling gains of each of R, Gr, Gb, and B signals
US7009639B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2000 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Aug 16, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To eliminate an amplitude difference between luminance signals from pixels included in horizontal lines of color filters, caused by a sensitivity difference from one photosensor to another in a CCD, and reduce a horizontal stripe-like noise appearing in a monitoring image and captured image, there is provided an arithmetic circuit to calculate an amplitude difference in Gr and Gb signals based on an output from a four-channel detector to set gains multiplied by compensation factors, respectively, with which the white balance-processed Gr and Gb signals are equal in amplitude to each other, thereby controlling the gain of a while balance amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.