System and method for light source calibration
US7084386B2 · kind B2 · utility
27Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2003 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/521
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light source calibration target has a surface in view of a camera of an image capture system, The target includes a substrate having a substantially Lambertian surface, a visually distinct polygonal shape having corners formed on said surface so as to be visually distinct from the surface, and a plurality of objects each having an upstanding tip mounted on the surface, A method of using the calibration target operates, for each of the light sources to be calibrated, to capture an image of the target; process the captured image to derive light source calibration data and to store the calibration data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.