A new variant of the Ouchi illusion reveals Fourier-component-based processing
A new variant of the Ouchi illusion reveals Fourier-component-based processing
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DOI：
10.1068/p5060
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发表时间：
2005-01-01
期刊：
影响因子：
1.7
通讯作者：
Sakurai, K
中科院分区：
文献类型：
--
作者：
Ashida, H;Kitaoka, A;Sakurai, K
我们报告说，异常运动错觉的一个新的变种的大内图是很好地预测其傅立叶基本面和谐波的强度。最初的大内图形由一个矩形棋盘图案组成，该图案被一个正交的矩形棋盘图案包围，其中两个区域之间的虚幻相对运动被感知。虽然这种错觉已被解释为在整合一维运动信号以确定二维运动方向时的偏差，但其生理机制尚未阐明。在我们的新刺激中，由细线而不是矩形组成，我们发现当每个线元素的位置随机移动时，感知的错觉会大大减少。这不是通过沿着可见边缘的局部运动集成的简单模型来预测的。沿着可见边缘的局部运动集成的简单模型。我们表明，相关的傅立叶基本面和谐波的相对振幅导致定量预测。我们的分析成功地应用于其他变体的大内图（Khang和Essock 1997年感知26 585-597），密切预测报告的评级。结果表明，潜在的生理机制是敏感的傅立叶分量的刺激，而不是可见的边缘。
We report that anomalous motion illusion in a new variant of the Ouchi figure is well predicted by the strength of its Fourier fundamentals and harmonics. The original Ouchi figure consists of a rectangular checkerboard pattern surrounded by an orthogonal rectangular checkerboard pattern, in which illusory relative motion between the two regions is perceived. Although this illusion has been explained in terms of biases in integrating one-dimensional motion signals to determine the two-dimensional motion direction, the physiological mechanism has not been clarified. With our new stimuli, which consisted of thin lines instead of rectangles, we found that the perceived illusion is drastically reduced when the position of each line element is randomly shifted. This is not predicted by simple models of local motion integration along the visible edges. We demonstrate that the relative amplitude of the relevant Fourier fundamentals and harmonics leads to a quantitative prediction. Our analysis was successfully applied to other variants of the Ouchi figure (Khang and Essock 1997 Perception 26 585-597), closely predicting the reported rating. The results indicate that the underlying physiological mechanism is sensitive to the Fourier components of the stimuli rather than the visible edges.