Correlated secondary TRC calibration method
US7274492B1 · kind B1 · utility
3Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2000 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | May 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4078
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention is a method of producing a set of TRC's for a color printer's secondary halftone screens that is correlated with the printer's primary halftone screens. The method makes use of the printer/screen characteristic data that is normally gathered during screen calibration. However, instead of progressing from the data to a normal calibration for the secondary screens, the method goes backward through the data starting with the finished primary screen TRC's. The method insures that for every primary screen density, the closest possible secondary screen density is used when the same digital value is specified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.