Tsofe Avital, Yucht Yulia, Beyil Jenny, Einav Shmuel, Spitzer Hedva
Department of Biomedical Engineering, Faculty of Engineering, Tel-Aviv University, 69978 Tel-Aviv, Israel.
Vision Res. 2010 Oct 28;50(22):2284-94. doi: 10.1016/j.visres.2010.07.001. Epub 2010 Jul 7.
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.
瓦萨雷利的“嵌套方块”错觉是指在具有亮度梯度的同心方块对角线上感知到一个发光的“X”。在此，我们呈现了在等亮度条件下的彩色瓦萨雷利效应，其中同心角具有颜色梯度。通过两种测量方法——虚幻褶皱的长度和颜色，对该效应的强度进行了心理物理学测试。虚幻褶皱的颜色被感知为嵌套方块（或角）颜色的互补色。实验结果表明，大量具有不同颜色和角度的刺激产生了显著的感知颜色。结果表明，在刺激角度更尖锐时，感知到的虚幻褶皱（长度和色度）强度显著更大。彩色一阶适应计算模型预测了上述大部分结果。
