Illusory motion due to causal time filtering
Illusory motion due to causal time filtering
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DOI：
10.1016/j.visres.2009.11.021
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发表时间：
2010-02-08
期刊：
影响因子：
1.8
通讯作者：
Kitaoka, Akiyoshi
中科院分区：
文献类型：
--
作者：
Fermueller, Cornelia;Ji, Hui;Kitaoka, Akiyoshi
一类新的图案由不对称强度分布的重复斑块组成，引起强烈的幻觉运动感知。我们认为造成这种错觉的主要原因是对注视眼球运动引起的图像运动的错误估计。图像运动是通过空间和时间能量滤波器来估计的，它们在空间上对称，但在时间上不对称（因果）。也就是说，仅使用过去而不是未来来估计时间能量。结果表明，此类滤波器错误地估计了某些空间频率下局部不对称强度信号的运动。在一项实验中，通过将虚幻运动与相反的真实运动归零来定量比较不同虚幻信号的感知，并发现该模型可以很好地预测。 (C) 2009 Elsevier Ltd. 保留所有权利。
A new class of patterns, composed of repeating patches of asymmetric intensity profile, elicit strong perception of illusory motion. We propose that the main cause of this illusion is erroneous estimation of image motion induced by fixational eye movements. Image motion is estimated with spatial and temporal energy filters, which are symmetric in space, but asymmetric (causal) in time. That is, only the past, but not the future, is used to estimate the temporal energy. It is shown that such filters mis-estimate the motion of locally asymmetric intensity signals at certain spatial frequencies. In an experiment the perception of the different illusory signals was quantitatively compared by nulling the illusory motion with opposing real motion, and was found to be predicted well by the model. (C) 2009 Elsevier Ltd. All rights reserved.