Systems and methods for obtaining a spatial color profile, and calibrating a marking system
US7295340B2 · kind B2 · utility
9Cited by
22References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2003 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Oct 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Tone reproduction curves for calibrating a marking system are obtained using a test pattern with a plurality of patches, preferably a plurality of first test patches extending in a first direction and at least one second test patch extending in a second direction crossing the first direction. Reflectance values are obtained from the first and second test patches. A set of gray balanced tone reproduction curves are obtained based on the reflectance values of the first test patches, and a set of spatial gray balanced tone reproduction curves are obtained based on the reflectance values of the second test patches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.