Color image processing method and apparatus utilizing the same
US5801855A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Aug 25, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color image processing apparatus converts a first color signal (RGB signal) stored in a frame memory for displaying on, e.g., a CRT color monitor into a third color signal (R'G'B' signal) whose color image information is used for permanent visible representation by a printer, and outputs the third signal in order to effectively adjust differences between color gamuts of different devices. In the conversion processing, a conversion function for directly converting the first color signal into the third color signal is obtained by synthesizing three functions, namely, a first conversion function for converting the first color signal into a standard color space signal, a second conversion function for converting the standard color space signal into the third color signal, and a third conversion signal for converting the standard color space signal into another standard color signal suitable for a color gamut of the printer. The first color signal is converted into the third color signal in accordance with the new synthesized conversion function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.