Processing image data to transform color volumes
US6757425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Aug 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/622
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of modifying image colors in which a user identifies a source color (707) and a destination color (708) having a common luminance (704). Source and destination color volumes (821, 822) are defined by firstly identifying two points (811, 812) opposite in color to the source (707), and secondly by selecting the most distant of white or black (813) as another point. The source color volume (821) and destination color volume (822) have these three points in common. A transformation is then defined (804) to transform from the source to the destination volume. This transformation, when applied (805) to image colors, results in the color change intended by the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.