Color discrimination system
US6094272A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1999 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jun 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/466
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A color discrimination system resistant to distance variation for displaying a color match degree using a digital display, such as a bar graph. In the color discrimination system, light reflected or transmitted from a measurement object is received, wherein the light includes at least two of R (red), G (green), and B (blue) colors. A sum total of measured light reception quantities of the colors and ratios of the respective measured light reception quantities of the colors to the sum total of measured light reception is then calculated. A comparison of the calculated values of the sum total and/or the ratios of the measured light reception quantities of the colors to the sum total with reference values of the sum total of light reception quantities and/or the ratios of the light reception quantities of the colors to the reference value of sum total for a reference object is performed, thereby discriminating between color of the measurement object and color of the reference object. The color difference indicates a match degree, and the match degree is displayed digitally in the format fitted to the sense of a human being.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.