Gray scale calibration tool for setting the density of a printer
US6268932A · kind A · utility
9Cited by
16References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1998 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Apr 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4078
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Density calibration for a printer is achieved using a standard grey scale vignette master and a stored gray scale vignette image that the printer operator can invoke from the operator panel of a printer. The vignette image provides a pre-calibrated scale that is used in conjunction with the .quadrature.standard.quadrature. image to determine the proper optical density. The density is then set by the printer control panel based upon the value obtained by visually matching the two grey scale vignettes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.