Systems and methods for building a color lookup table for a printer
US8335015B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2009 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | May 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Color separation systems and methods improve color constancy and smoothness of a color lookup table (LUT) for a printer. A plurality of nodes of the LUT may be defined in colorimetric space, and the nodes out of the printer gamut may be mapped to the printer gamut surface. A set of possible colorant combinations are then determined that produce each node in the LUT in a device independent color space using a non-linear minimization algorithm, such as, for example, a conjugate gradient algorithm. Next, a colorant combination may be determined for each and every node in the LUT based on an image quality metric. In some implementations, a smoothing filter may be used to smooth the lookup table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.