System and method for converting color data
US6681041B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2000 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Apr 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method converts input color data in different formats into a working color space. In the case that the input data includes a device color profile and the desired working color space is an RGB space, gamma information of the input data may be extracted from the color profile. In a Simplified extraction process, the gamma information may be extracted by combining one-dimensional LUTs in the profile in a gray-scale conversion to form a gamma table. When the color profile is a more complex profile, such as one of the regular ICC profile format, a full extraction process may be used, in which gamma information is derived from each of the front end, middle and back end portions of the profile. The derived gamma information may then be combined to provide a final gamma table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.