Differential imaging colorimeter
US7262779B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Mar 2, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/466
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A differential imaging colorimeter system and method which utilizes a RGB color camera to provide accurate differential colorimetry which can be employed as a portable, dedicated, offline system. The system utilizes a portable processor such as a laptop computer, a hand-held imaging head comprising a color camera, a lens, a plurality of white LED lights, a base plate defining an imaging region, housed in an opaque cover, wherein the imaging head provides a RGB video image to the portable processor; and a software program loaded on the portable processor for applying a geometric transform on an image obtained with the imaging head to match a stored reference image. The computer calculates differential colorimetry values to compare current images with a stored reference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.