CHARACTERIZATION OF 6 RED COLOR EVALUATION SAMPLES

A unique hue is defined as a color which an observer perceives as a pure, without any admixture of another color. If we take red as example than there are pure red hues and hues that contain either yellow or blue. In the following the spectral reflectance curves of 6 red samples of the CES color set used in the IES TM-30-15 procedure are compared.


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CHARACTERIZATION OF EQUALLY CONSPICIOUS RGBAC SPOTLIGHTS

By adding cyan and amber to red, green and blue LEDs the color gamut of a spot is considerably extended. To test conspicuity of chromatic light a chromatic patch was projected on a wall and was compared to an achromatic one. Below are the profiles for seven stimuli that demonstrate equal conspicuity measures.


 

CHARACTERIZATION OF EQUALLY CONSPICIOUS RGB SPOTLIGHTS

The Helmholtz-Kohlrausch effect is the influence of color purity on the perceived brightness of a surface. In the following are spectral characteristics of stimuli given that have proven to attract attention equally strong. The high spectral purity that colored LED sources can provide induces the perception of considerable brightness. To test conspicuity a chromatic light patch on a wall was compared to an achromatic one. Below are the profiles given for blue, green, red and purple stimuli that demonstrate equal conspicuity measures than a white spot with a luminance of 10.1 cd/m².

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