Printing system for printing patches having different length to measure gradation values
US9444974B2 · kind B2 · utility
4Cited by
0References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2010 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | May 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to the present invention, patch data is printed in such a manner that the length of a low-optical-density patch is small and the length of a high-optical-density patch is large. In addition, the measurement is performed by a sensor that measures at a constant scanning speed. Therefore, SN of a dark patch having a high optical density is improved, and a patch chart can be measured in a short time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.