Visual search is affected by chromatic adaptation K Sakata |
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College of Art and Design, Joshibi University of Art and Design, Japan
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| The results of visual search tasks are known to be affected by local chromatic adaptation, which brings the target into focus without affecting the visual perception of other distracters (Theeuwes and Lucassen, 1993). However, chromatic adaptation extending to a broad area on the retina would not affect the results of these tasks because of its equal effects on the colour appearance of all the elements, i.e. the target and the distracters . The results of this study showed that the location of the adaptation stimuli on the chromaticity diagram influences the results of colour-based distinction between the target and distracters. The adaptation stimuli would affect all 3 types of receptors on the retina and the colour-vision mechanisms which usually accept visual information through the eyes. These results were discussed in the context of the loci of chromatic adaptation, i.e. the three cone system on the retina and the higher chromatic mechanisms in the cortex. |
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