Investigation of spatial organization based on chromatic signals

本研究项目调查了有助于空间组织的色彩处理。空间组织是指将视觉上相似的元素组合在一起并将这些元素与周围环境隔离开来的视觉功能。结果表明，复杂和不对称的相互作用。通过引入随机亮度噪声，在某些条件下促进了基于彩色信号的空间组织，而基于亮度信号的组织从未被彩色噪声促进。此外，相互作用的性质与刺激的空间结构不同。当刺激元素密集时，促进相互作用消失，基于彩色信号的组织在很宽的对比度范围内与亮度噪声无关。在第二项研究中，我们研究了基于彩色信号的空间组织是否会影响从运动中恢复三维（3-D）结构。结果表明，空间组织可以调节三维结构的恢复。当不同速度的运动点由于颜色的差异而被分离时，恢复的3-D结构在形状上更接近于某些空间配置中的真实结构。总体而言，本研究项目的结果阐明了色彩处理介导空间组织的本质以及它与其他视觉处理的关系。他们还认为，视觉处理介导的空间组织不同的性质与空间配置的刺激。我们需要进一步的研究来了解空间结构对空间组织的影响。

This research project investigated chromatic processing contributing to spatial organization. Spatial organization refers to the visual function which groups visually similar elements together and segregates the group of elements from its surroundings.In the first study, we investigated the nature of the interaction between luminance and chromatic processings in spatial organization. The results revealed complex and asymmetric interactions. Spatial organization based on chromatic signals was facilitated under some conditions by introducing random luminance noises, whereas organization based on luminance signals was never facilitated by chromatic noises. Moreover, the interaction varied in nature with the spatial configuration of the stimulus When the stimulus elements were densely packed, the facilitatory interaction disappeared and the organization based on chromatic signals was independent of luminance noises over a wide contrast range. In the second study, we investigated whether spatial organization based on chromatic signals affects the recovery of three-dimensional (3-D) structure from motion. The results showed that the spatial organization can modulate the recovery of 3-D structure. When the moving dots of different speeds were segregated due to a difference in color, the recovered 3-D structure was closer in shape to the veridical structure in some spatial configuration.Overall, the results of this research project elucidated the nature of chromatic processing mediating spatial organization and how it is related to other visual processings. They also suggest that visual processing mediating spatial organization vary in nature with the spatial configuration of the stimulus. We need further studies to understand the effects of the spatial configuration on spatial organization.