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Lightness constancy and its link with cone contrast
Murray, I J; Daugirdiene, A; Panorgias, A; Stanikunas, R; Kulikowski, J J; Kelly, J M
J Opt Soc Am A Opt Image Sci Vis. 2014;31(4):A350-6.
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Abstract
The link between chromatic constancy (compensation for hue and saturation shifts) and lightness constancy (compensation for a change in surface reflectance) was tested theoretically by computing cone contrasts and by asymmetric matching experiments. The effect of a thin achromatic line (a frame) around the test sample was tested empirically. When the samples were outlined by the frame, lightness constancy was increased and chromatic constancy reduced (p<0.001). Changes in luminance are more likely to be compensated when the luminance contrast edge around the test stimulus is disturbed as with the addition of an achromatic frame.
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*Contrast Sensitivity; *Light; Adult; Female; Humans; Male; Middle Aged; Retinal Cone Photoreceptor Cells/*cytology
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- Related website http://www.ncbi.nlm.nih.gov/pubmed/24695193
- Murray, I J Daugirdiene, A Panorgias, A Stanikunas, R Kulikowski, J J Kelly, J M F J Opt Soc Am A Opt Image Sci Vis. 2014 Apr 1;31(4):A350-6. doi: 10.1364/JOSAA.31.00A350.