Ejima Y, Takahashi S
Department of Psychology, College of Liberal Arts, Kyoto University, Japan.
Vision Res. 1988;28(12):1367-77. doi: 10.1016/0042-6989(88)90068-5.
An illusory-contour was induced by abutting colored gratings embedded in the white field under isoluminance condition. The present study specified the stimulus conditions that invoked the just-perceptible illusory contours for the isoluminant chromatic patterns. The results showed that the purity difference between the colored lines and the white field required for the illusory-contour perception gave a function closely resembling in shape the function obtained for saturation discrimination. Increasing the width of lines reduced threshold for the perception of illusory contours, while the line spacing had no significant effect. The dependence of the illusory-contour perception upon saturation could be accounted for by considering the extraction of the edge and colour information by means of the opponent-color processes observed for the cells in the retina and LGN. On the other hand, the effects of the spatial parameters met the response properties observed for the cells in the visual cortex. It is suggested that the perception of illusory contour may result from hierarchical organization from the retina to cortex in the visual system.
在等亮度条件下，通过拼接嵌入白色背景中的彩色光栅来诱发虚幻轮廓。本研究确定了能引发等亮度彩色图案中刚好可察觉虚幻轮廓的刺激条件。结果表明，虚幻轮廓感知所需的彩色线条与白色背景之间的纯度差异所呈现的函数形状，与饱和度辨别所获得的函数形状极为相似。增加线条宽度会降低虚幻轮廓感知的阈值，而线条间距则无显著影响。虚幻轮廓感知对饱和度的依赖性可以通过视网膜和外侧膝状体中细胞所观察到的拮抗色过程来解释，该过程用于提取边缘和颜色信息。另一方面，空间参数的影响符合视觉皮层中细胞所观察到的反应特性。这表明虚幻轮廓的感知可能源于视觉系统中从视网膜到皮层的层级组织。
