Method and device for calibrating an imaging apparatus having multiple imaging outputs
US6618158B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1998 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Nov 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved method and apparatus for calibrating an imaging system having multiple imaging outputs such as a plurality of laser diodes. Calibration is achieved by driving each imaging output to form a test pattern on an imaging element, each test pattern having one or more image regions and each image region having a target optical property such as a target optical density. Next, an optical property, such as optical density, is measured for each image region. A response curve is generated for each set of image regions having substantially equal target optical properties. The imaging outputs are adjusted by reducing a difference between the measured optical property and the generated response curve, thereby reducing optical variations between regions that are imaged by the multiple imaging outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.