Visual Inter-Attribute Contour Completion
Visual Inter-Attribute Contour Completion
复制标题
视觉属性间轮廓完成
作者：
L. Poom
展示了一种新的视觉现象--属性间虚幻(完整)轮廓。轮廓完成是在空间上分离的诱导元素对(类似Kanizsa的“吃豆人”图形)的任意组合之间感知的，这些元素由图片线索(亮度对比度或偏置栅格)、时间对比度(运动、二阶运动或“幻影”轮廓)或双目视差对比度定义。在第一个实验中，观察者报告了所有诱导元素对的轮廓完成的感知发生。在第二个实验中，他们对完成的轮廓的清晰度进行了评分。这两种方法产生了相似的结果--即使诱导元素由不同的属性定义，也能感觉到轮廓的完成。属性间清晰度的评分不低于两个相应的属性内条件下的评分，似乎是这两个评分的平均值。这些结果为属性不变格式塔过程的存在提供了证据，并在机制水平上表明补全过程是在属性不变轮廓检测器上进行的。
A new visual phenomenon, inter-attribute illusory (completed) contours, is demonstrated. Contour completions are perceived between any combination of spatially separate pairs of inducing elements (Kanizsa-like ‘pacman’ figures) defined either by pictorial cues (luminance contrast or offset gratings), temporal contrast (motion, second-order-motion or ‘phantom’ contours), or binocular-disparity contrast. In a first experiment, observers reported the perceived occurrence of contour completion for all pair combinations of inducing elements. In a second experiment they rated the perceived clarity of the completed contours. Both methods generated similar results—contour completions were perceived even though the inducing elements were defined by different attributes. Ratings of inter-attribute clarity were no lower than in either of the two corresponding intra-attribute conditions and seem to be the average of these two ratings. The results provide evidence for the existence of attribute-invariant Gestalt processes, and on a mechanistic level indicate that the completion process operates on attribute-invariant contour detectors.