Closed-loop color correction using factory-measured color cutoffs anchored to field-measured white point
US7134737B2 · kind B2 · utility
6Cited by
2References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Oct 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Absolute perceptual values are stored in the design lab, for maximum-density-tone cutoffs—preferably a maximum yellow-blue chrominance b* for yellow and minimum luminosity L* for other colorants. Automatic field operations in each printer then force the printer to subsequently print nominal full-saturation colorants so as to match the stored values. In addition to the stored cut-offs, black-and-white reference values measured in the printer are also used in linearizing printer response, for specific combinations of printing medium and printmode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.