Human visual system integrates color signals along a motion trajectory
Human visual system integrates color signals along a motion trajectory
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DOI：
10.1016/j.cub.2006.12.041
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发表时间：
2007-02-20
期刊：
影响因子：
9.2
通讯作者：
Tokimoto, Toyotaro
中科院分区：
文献类型：
--
作者：
Nishida, Shin'ya;Watanabe, Junji;Tokimoto, Toyotaro
基本的视觉属性，如颜色、运动和形状，是否在专门的通路中被单独分析，一直是视觉神经科学的中心问题之一[1-3]。虽然最近的研究已经揭示了各种形式的跨属性相互作用，包括颜色信号对运动处理的重要贡献[4-9]，但人们仍然普遍认为颜色感知相对独立于运动处理。在这里，我们报告了一种新的颜色错觉，运动引起的颜色混合，其中移动的酒吧，其中每一个的颜色在两种颜色之间交替（例如，红色和绿色），被感知为混合颜色（例如，黄色），尽管这两种颜色从未在视网膜上叠加。颜色混合的幅度明显强于颜色信号的方向不敏感空间积分所预期的幅度[10，11]。这种错觉不能归因于光学图像模糊，包括色差引起的模糊[12，13]，或观察者的无意识眼球运动。我们的研究结果表明，颜色信号集成不仅在同一视网膜位置，而且沿着运动轨迹。这种神经机制可能通过减少运动模糊来帮助我们看到移动物体的verldical颜色，就像基于亮度的模式感知一样[14-19]。
Whether fundamental visual attributes, such as color, motion, and shape, are analyzed separately in specialized pathways has been one of the central questions of visual neuroscience [1-3]. Although recent studies have revealed various forms of cross-attribute interactions, including significant contributions of color signals to motion processing [4-9], it is still widely believed that color perception is relatively independent of motion processing. Here, we report a new color illusion, motion-induced color mixing, in which moving bars, the color of each of which alternates between two colors (e.g., red and green), are perceived as the mixed color (e.g., yellow) even though the two colors are never superimposed on the retina. The magnitude of color mixture is significantly stronger than that expected from direction-insensitive spatial integration of color signals [10, 11]. This illusion cannot be ascribed to optical image blurs, including those induced by chromatic aberration [12, 13], or to involuntary eye movements of the observer. Our findings indicate that color signals are integrated not only at the same retinal location, but also along a motion trajectory. It is possible that this neural mechanism helps us to see verldical colors for moving objects by reducing motion blur, as in the case of luminance-based pattern perception [14-19].