Abstract

Using halftone techniques and additive color mixture notions, we have implemented different ways to obtain colors matching CIE specifications from hard-copy color printing devices. We also report on our similar studies for matching colors to the Optical Society of America uniform color scales. The range of color reproduction is obtained by determining the tristimulus values of the color primaries. As long as the given color is within this color reproduction range, it can be reproduced by selecting the proper color primaries and the required amount of each primary. For colors outside the color reproduction range, we compare different ways to make the closest match. We performed experiments in which we used a thermal-wax-print color image printer that was calibrated by a precision spectrophotometer. We describe the error in matching colors quantitatively in units of "just-noticeable differences."

© 1990 Optical Society of America