Effects of angular distances between colour stimuli on colour conspicuity

Abstract

Colour stimuli systematically selected from the HJC colour space of CIECAM02 were juxtaposed at four angular distances (10°, 30°, 60°, and 90°). The observers evaluated the colour conspicuity of the colour stimuli using the paired comparison method. Results showed that the colour conspicuity of chromatic colours at an angular distance of 90° was higher than at angular distances of 60° because, at angular distances of 10° to 60°, simultaneous comparisons were made on two presented stimuli in peripheral vision where colour perception declines, whereas temporal comparisons were made in central vision at an angular distance of 90°.