Electronic image color plane reconstruction
US7072509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Feb 9, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The color of a color image having at least two sets of image pixels having color and luminance values is corrected by generating, for each color value, a low spatial frequency monochrome image including a set of smoothed image pixels. A color correction function is applied to selected sub-sets of the image pixels to generate corresponding sub-sets of corrected, smoothed image pixels. The correction includes a contribution from smoothed image pixels in one or more of the other sets of smoothed image pixels. The sub-sets of corrected smoothed image pixels is completed by interpolation or extrapolation. Each set of corrected smoothed image pixels is used to generate a corrected color image by generating one or more high spatial frequency luminance images that are combined with each of the corrected low spatial frequency monochrome images to form a full color image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.