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Quantitative Measurement of Sensitivity in Peripheral Visual field

周边视野灵敏度的定量测量

基本信息

批准号：
11832006
负责人：
UCHIKAWA Keiji
金额：
$ 2.3万
依托单位：
Tokyo 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：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

We use the fovea when we look at an object carefully, but we use the peripheral visual field when we see our environmental world surrounding us. The visual properties are very different between the fovea and the peripheral visual field. Therefore it is important and necessary to consider characteristics of the peripheral visual field in order to obtain good reality in a large picture presented in a large-size display. We measured 1. visual space localization and displacement sensitivity during saccade and pursuit eye movements, 2. temporal contrast sensitivity function, 3. categorical color perception, 4. vection as an index of reality sensation, in the peripheral visual field by psychophysical methods in order to quantify sensitivity of the peripheral vision. Our research achievement is summarized as follows.1. Apparatuses were built to present a large stimulus synchronizing eye movement in the peripheral visual filed. The results show that stimulus at the target position in the peripheral visual field was better discriminated before saccade, distortion of localization was observed during saccade, but not observed during pursuit eye movements, and stimulus displacement sensitivity in the entire visual field was degraded.2. Temporal contrast sensitivity function at the fovea was almost equal to that at the 30 and 40 deg in the nasal visual field in higher temporal frequencies, and was lower in the lower temporal frequencies when the stimulus size and intensity were equated by the MF-scaling.3. Categorical color appearance was almost the same between at the fovea and in the peripheral visual field although color appears continuously different across visual field.4. Vection strength was measured with magnitude estimation and latency as a function of the stimulus size. It is shown that vection strength increased up to 80 deg of the stimulus size, and that vection strength was correlated well with barycentric fluctuation.

当我们仔细观察物体时，我们会使用中央凹，而当我们观察周围的环境世界时，我们会使用周边视野。中央凹和周边视野的视觉特性非常不同。因此，为了在大尺寸显示器中呈现的大图像中获得良好的真实感，考虑周边视野的特征是重要且必要的。我们通过心理物理学方法测量了周边视野中的 1. 扫视和追踪眼球运动期间的视觉空间定位和位移敏感性，2. 时间对比敏感度函数，3. 分类颜色感知，4. 作为现实感觉指标的矢量，以量化周边视觉的敏感性。我们的研究成果概括如下： 1．设备的设计目的是在周边视觉场中呈现同步眼球运动的大刺激。结果表明，在扫视前对周围视野目标位置的刺激有较好的辨别能力，在扫视过程中观察到定位失真，但在眼球追踪运动过程中观察不到定位失真，并且整个视野内的刺激位移敏感性下降。2．在较高时间频率下，中央凹处的时间对比敏感度函数几乎等于鼻视野30°和40°处的时间对比敏感度函数，而当刺激大小和强度通过MF缩放相等时，在较低时间频率下，时间对比敏感度函数较低。3．尽管颜色在整个视野中出现连续不同，但在中央凹和周边视野中的分类颜色外观几乎相同。4。通过幅度估计和延迟作为刺激大小的函数来测量矢量强度。结果表明，矢量强度增加到刺激大小的 80 度，并且矢量强度与重心波动密切相关。