Characteristics of the Sony Multiscan 17se Trinitron color graphic display

Vasarely's 'nested-squares' illusion is the perception of a glowing "X" along the diagonals of concentric squares with a luminance gradient. We present here the chromatic Vasarely effect, where the concentric angles have a chromatic gradient, under iso-brightness conditions. The strength of the effect was tested psychophysically by two measures, the length and the color of the illusory folds. The color of the illusory fold is perceived as the complementary color of the color of the nested-squares (or angles). The experimental results show that a large repertoire of stimuli with different colors and angles yielded significantly perceived colors. The results show that the strength of the perceived illusory fold (of both the length and the chroma) is significantly larger at sharper angles of the stimuli. The chromatic first-order adaptation computational model predicts most of the above results.

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Chromatic Vasarely effect

Tsofe

Yucht

Beyil

et al. 2010

Vision Research

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Second-order Mach bands: Chromatic and achromatic

Tsofe

Spitzer

2011

Vision Research

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Achromatic second-order (contrast) Mach bands can be perceived near the contrast ramp between two contrast levels. In this study we show that a repertoire of chromatic second-order Mach bands is also clearly perceived, under equal-luminance conditions (minimum motion technique). The results show that chromatic and achromatic second-order stimuli yield significant perceived second-order Mach bands, with approximately the same relative magnitude. At high spatial frequencies the effect is more prominent for achromatic second-order Mach bands stimuli than for chromatic second-order stimuli. The effect of the chromatic second-order Mach bands is smaller for complementary pairs of colors than for non-complementary pairs of colors. We suggest that the effect of second-order Mach bands is an expression of the mechanism of second-order induction.

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Photometric and colorimetric measurements of CRT and TFT monitors for vision research

Klein

Zlatkova

Lauritzen

et al. 2013

Journal of Modern Optics

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Characteristics of the Sony Multiscan 17se Trinitron color graphic display

Cited by 7 publications

References 0 publications

Chromatic Vasarely effect

Chromatic Vasarely effect

Second-order Mach bands: Chromatic and achromatic

Photometric and colorimetric measurements of CRT and TFT monitors for vision research

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