Colorimetric imaging system
US6760475B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2000 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Aug 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides for an imaging system that obtains, as well as a method for obtaining, the colorimetric value of a plurality of points in a scene when the scene is lit by a source of illumination. The system comprises an imaging detector, imaging optics that receive light from the scene and direct it to the detector, a tunable filter responsive to applied electrical signals that filters the spectrum of light passing therethrough, and a control circuit for acquiring and storing a plurality of images from the detector while the tunable filter expresses a plurality of predetermined filter response functions in response to applied electrical signals, and for determining the colorimetric values from the stored images, wherein each of the filter response functions has substantial transmission at a plurality of wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.