Process for color transformation and a color video system
US6025885A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1996 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Oct 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/67
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a process for color transformation from the input-side primaries (R, G, B) to image-side primaries (R", G", B") with a greater color stimulus specification region than that given by the input-side primaries (R, G, B), a color transformation is carried out by converting the components of a color vector from the input-side primaries to fictitious primaries (R', G', B') so that the color stimulus specification of the color vector is changed, and transforming of the converted components of the color vector from the fictitious primaries (R', G', B') to the image-side primaries (R", G", B") for generating image-side components of the color vector, wherein the image-side color stimulus specifications produced in this way have the same hue and the same saturation as the transformed color stimulus specification in the fictitious primary system (R', G', B'). A color video system for carrying out the process accordingly contains a circuit (15) id for converting the signals to the fictitious primary system (R', G', B') and a matrix circuit (14) for transforming from the fictitious primary system to the image-side primary system (R", G", B").
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.