Process for calibrating electronic imaging devices
US6310698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2000 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | May 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4078
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for developing calibration curves and for calibrating a halftone imaging device to reproduce on an imaging medium gray scale values equal to input gray scale values entered in said imaging device. According to this method a calibration function representing a linear change in reproduced halftone dot size on said imaging medium as a function of input halftone dot size is developed by using the device to reproduce on an imaging medium at least two test input dot values representing two different % halftone dot sizes and determining a linear change between the input and the reproduced halftone dot sizes. The dot growth is used to predict dot changes for other % halftone dots and thus construct calibration curves which may be used to calibrate the imaging device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.