Abstract
On the basis of signal theory, we analyse the different information content of colour stimuli that correspond to variations along the red-green and yellow-blue channels (or chromatic signals). The experimental results for stimuli generated by two CRT colour monitors and extended to handmade samples show a higher chromatic contrast when pairs of stimuli are generated by red-green variations than by yellow-blue variations. This information should be taken into account in such applied areas as colour reproduction, image processing, colour displays, and computer graphic design, which use chromatic information based on human chromatic perception in order to achieve a more effective presentation of colour information.
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