Publications by authors named "Pim Koeckhoven"
Predicting the performance of low-cost color instruments for color identification.
J Opt Soc Am A Opt Image Sci Vis
March 2019
During the past few years, several instruments for color measurement have become commercially available at unprecedented low prices. Although these instruments are no spectrophotometers, their price-performance ratio may be attractive for applications that do not require the high accuracy of traditional instruments. We investigated the performance of this class of instruments.
View Article and Find Full Text PDFAccurate measurements of reflectance and color require spectrophotometers with prices often exceeding $3000. Recently, new “color instruments” became available with much lower prices, thanks to the availability of inexpensive colorimetric sensors. We investigated the Node+ChromaPro and the Color Muse, launched in 2015 and 2016 by Variable Inc.
View Article and Find Full Text PDFHow color difference formulas depend on reference pairs in the underlying constant stimuli experiment.
J Opt Soc Am A Opt Image Sci Vis
December 2015
Article Synopsis
- The CIEDE2000 and CIE94 equations are key for calculating color differences, based on visual data from psychophysical tests that compare color samples.
- The current study shows that changing reference pairs in color difference calculations can significantly affect the results, particularly with metallic paint samples of red and yellow-green.
- Findings indicate that color perception varies among observers, with differences in tolerances for lightness and rotations in color difference measurements, likely influenced by the metallic texture of the samples.