Method and apparatus for calibrating a color measurement instrument
US9952102B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2017 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Jun 21, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one example, an electronic signal is received from a target color measurement instrument that includes a plurality of color channels. A response of the target color measurement instrument to a light emitted by a target light emitting device is extracted from the signal. The response is calibrated to minimize a difference between the response and an output of a color matching function of a standard observer. Calibrating includes multiplying the response by a calibration matrix. The calibration matrix combines measurements of a first plurality of lights from a tunable light source and measurements of a second plurality of lights from the target light emitting device. A first subset of the measurements of the first plurality and second plurality of lights are made by the target color measurement instrument and a second subset of the measurements of the first plurality and second plurality of lights are made by a reference spectroradiometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.