Abstract
Logvinenko [ Perception 31, 201 ( 2002)] asserts that Adelson’s wall-of-blocks illusion [ Science 262, 2042 ( 1993)], where identical gray-cube surface tops appear to differ in brightness, arises when the surfaces surrounding the cube tops are shadow compatible, creating a concomitant illusion of transparency. We replicated Logvinenko’s main findings in the chromatic domain across three experiments in which observers match cube tops in hue, saturation, and brightness. A second set of stimuli adjusted cone-excitation ratios across the apparent transparency border [ Proc. R. Soc. London 257, 115 ( 1994)], which enhanced lightness and brightness constancy but only when the stimuli varied in both chromaticity and intensity.
© 2005 Optical Society of America
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