Method for deriving consistent color measurements
US7840065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Sep 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6055
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for measuring a color value such as brightness or intensity of a sample which comprises: measuring color values for a plurality of color standards using a reference color measurement device to obtain a matrix Y that contains the measurements of the color standards as measured by the reference color measurement device; measuring the same plurality of color standards with a field color measurement device to obtain a matrix X that contains the measurements of the color standards as measured by the field color measurement device; calculating a color correction matrix B based upon the equation Y=BX, measuring the color value for the sample with the field color measurement device, and applying the color correction matrix B to the reading of the sample color to obtain a sample color value that approximates that sample color value that would be obtained using the reference measurement device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.