Psychophysical research on integration of local motion signals and generation of 2-dimensional motion signals in the human visual system

人类视觉系统中局部运动信号整合和二维运动信号生成的心理物理学研究

• 批准号: 09610077
• 负责人: OHTANI Yoshio
• 金额: $ 1.66万
• 依托单位: Kyoto Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09610077/
• 关键词: motion perception; motion assimilation; visual masking; 2次元運動

The present research concerns the integrative process of the human visual motion processing. It is well known that in the human visual system, local motion signals are detected at the first stage of processing, and the outputs of the first stage are integrated into two-dimensional global motion signals at the second stage. But the spatio-temporal properties and the nature of the integrative process are yet to be elucidated. The present research examined experimentally the stimulus dependencies of facultative and inhibitory interactions between local motion signals, thereby amied to explore the integrative process of the human visual motion processing. In a first series of experiments, motion assimilation for expansion/contraction and its spatial properties were examined in a two-frame apparent motion display. And, in the second series, the effects of stimulus spatio-temporal properties on motion assimilation and motion contrast were examined in a two- and multi-frame apparent motion display. The main fidings obtained in the two series of experiments are(1) facilitaive interactions exist not only between local one-dimensional motion signals, but also between local signals and global two-dimensional motion signals.(2) relative dominance between facilitaive and inhibitory interactions varies depending on the three stimulus parameters, ie. displacement size, number of frames of the motion display, and duration of each frame.These results will serve as critical cues to elucidate (and help to establish a model of) the integrative process of the human visual motion processing.

目前的研究涉及人类视觉运动加工的整合过程。众所周知，在人类视觉系统中，在处理的第一阶段检测局部运动信号，在第二阶段将第一阶段的输出整合为二维全局运动信号。但这一整合过程的时空特征和本质仍有待阐明。本研究通过实验考察局部运动信号间兼性和抑制性相互作用的刺激依赖性，从而探讨人类视觉运动加工的整合过程。在第一个系列的实验中，运动同化的扩张/收缩和它的空间特性在两帧视在运动显示检验。在第二部分中，我们通过两帧和多帧视运动显示研究了刺激时空特性对运动同化和运动对比的影响。两组实验的主要发现是：(1)局部一维运动信号之间存在促进相互作用，局部信号与全局二维运动信号之间也存在促进相互作用。(2)促进性和抑制性相互作用的相对优势取决于三个刺激参数，即：位移大小，运动显示的帧数，以及每帧的持续时间。这些结果将作为关键线索来阐明（并帮助建立一个模型）人类视觉运动加工的综合过程。

项目成果

Y.Ohtani, M.Tanigawa and Y.Ejima: "Motion assimilation for expansion/contraction and rotation and its spatial properties" Vision Research. Vol.38, no.3. 429-438 (1998)

Y.Ohtani、M.Tanikawa 和 Y.Ejima：“扩张/收缩和旋转的运动同化及其空间特性”视觉研究。