The Color Calculator 1.0 from
Radiant Imaging Inc. is a free software tool that performs colorimetric and photometric calculations and conversions. It plots data points on a CIE chromaticity chart, calculates the color difference between two points on the chart and graphs spectral power distribution for a source. It contains mathematical definitions for luminance, illuminance, and luminous flux and intensity. The program is compatible with Windows 98/XP/NT and 2000 and can be downloaded from the company's Web site, or a CD version can be ordered by calling.
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