System and method for coding colors and storing compensation factors used in color space conversion
US5995655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jun 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for coding colors and storing compensation factors used in converting colors from one color space to another color space. A color is converted from a first color space to a second color space using a color space converter. If one or more components of the second color is invalid in the second color space, a constant hue algorithm is used to create a compensated color which is valid in the second colors space. Specifically, a compensation determinator determines a compensation factor which is used in a compensation adjuster along with a constant hue algorithm to create the compensated color triplet. As a result of the constant hue algorithm, one of the color components of the compensated triplet is either zero or saturated. All except two bits of the storage space for the zero or saturated compensated color component are used to store the compensation factor. The other two bits are used to identify whether the color is zero or saturated and to identify the color component used to store the compensation factor. A color coding scheme is employed to identify valid colors from compensated colors and to identify the component used to store the compensation factor. An …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.