Four color trilinear CCD scanning
US6380539B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/253
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A single pass scanner having a trilinear array, a source of white light, filters of the three primary colors and a separate source of infrared light is used in various methods of removing medium-based defects from a scanned film image. The method generates an infrared channel in addition to the common visible channels by covering the parallel rows of sensors in the trilinear array respectively with a red, green and blue filter to create the three color channels. Normally, each of the three color filters also passes infrared light, which is removed by filters external to the sensors. In a specific embodiment, interstitial in time between two visible light scans, the sensor is exposed to infrared light for a single scan. As the trilinear array sweeps across an image in time and spatial synchronization with the exposing lights, at least two visible channels and an infrared channel are generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.