Method and apparatus for changing specified color in a color image
US5719639A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Mar 20, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/001
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A subject color and a non-subject color of color change operation are specified and then a first color vector representing the subject color and a second color vector representing the non-subject color are obtained. A substitute color for replacing a component of the subject color is further specified, and a color vector representing the substitute color is obtained. A third color vector independent of the first and second color vectors is further determined. A color of each pixel in an original color image is expressed by linear combination of the first through third color vectors, thereby obtaining first through third coefficients for the first through the third color vectors. If the first coefficient is positive, the first color vector is replaced by the substitute color vector. The pixel color after the color change operation is then determined by producing a composite vector using the first through the third coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.