Four-Color Matrix Method for Correction of Tristimulus Colorimeters Part 2

Published

November 20, 1998

Author(s)

Yoshihiro Ohno, Steven W. Brown

Abstract

The Four-Color Method was developed to improve the accuracy of tristimulus colorimeters for measurements of color displays. It was verified that the method works well for CRTs. The accuracy of this method has been studied further for spectral variations of displays including CRTs, LCDs, and organic LED displays. A theory for additional photometric (Y) correction is also given. A simulation was conducted using data of actual tristimulus colorimeters and displays having variations in their spectral power distribution. The results show that, if the correction matrix is made with one type of display and other types of display are measured, the error correction will not be effective. If the calibration and measurement is limited to one type of display, the residual errors are found to be within 0.002 in chromaticity x, y and a color difference of 2 {Δ}Eab. An experiment was also conducted to verify the Four-Color Method for measurements of an LCD. The errors of a colorimeter for 14 colors were reduced to within 0.002 in x, y. and 1 {Δ}Eab. It has been experimentally verified that the method works well for LCDs as well.

Proceedings Title

Proceedings of the 6th IS&T/SID Color Imaging Conference

Conference Dates

November 16-20, 1998

Conference Title

IS&T/SID Color Imaging Conference

Pub Type

Conferences

Keywords

calibration, chromaticity, color, colorimetry, correction, display, luminance, matrix method, tristimulus colorimeter

Citation

Ohno, Y. and Brown, S. (1998), Four-Color Matrix Method for Correction of Tristimulus Colorimeters Part 2, Proceedings of the 6th IS&T/SID Color Imaging Conference (Accessed July 18, 2024)