Role of chromatic mechanism on 2D and 3D motion perception

本研究的目的是揭示彩色运动机制如何有助于检测由彩色调制定义的运动。我们以前的研究表明，存在两种机制来分析二维不同的运动，这些机制中介不同类型的运动，如一阶和二阶运动。然而，目前还不够清楚地显示出彩色运动机制的总体框架。结果表明，一阶色运动的脉冲响应函数不能理解为亮度通道的函数，也不能理解为色通道的函数，这表明一阶色运动可能是由对颜色和运动敏感的机构来调节的。在三维运动机制方面，我们发现运动检测器可以与深度检测器协作产生三维运动感知信号，解决了光圈问题中运动方向的模糊问题。

Our aim of this study is to reveal how chromatic motion mechanism contributes to detect motion defined by chromatic modulation. Our previous studies showed that there are two mechanisms to analyze different motions in two-dimension and that these mechanisms mediate different type of motion, such as first- and second-order motion. However, it is not clear enough to show a total framework of the chromatic motion mechanism. We therefore investigated temporal property and orientation selectivity of the mechanism in psychophysical and computational approach for two-dimension motion.The results on temporal property showed that impulse response function for first-order chromatic motion cannot be understood as neither the function of luminance channel or that of chromatic channel, indicating that first-order chromatic motion is probably mediated by a mechanism which is sensitive to color and motion.On aspect of three-dimensional motion mechanism we found that the motion detector could collaborate with depth detector to produce signals of three-dimensional motion perception, which solve ambiguity of motion direction in the aperture problem.