立体视觉中的牵挂现象及其神经机制  

Hitching phenomenon and neural mechanism in stereopsis

作　　者：朱宪铎[1] 张国[1] 冯旻[1] 汪亮[1] 杨仲乐[1] 

机构地区：[1]中南民族大学脑认知科学实验室,湖北武汉430074

出　　处：《现代生物医学进展》2008年第8期1526-1528,共3页Progress in Modern Biomedicine

摘　　要：目的:探讨立体视觉中单眼线索和双眼线索之间的牵挂机制。方法:选择该校视力或矫正视力正常的硕士研究生10名作为受试者,刺激呈现在校准过的SD2320W三维液晶显示器上。①一对具有清晰边沿的立方体,以及一对移除连接Y节点三条线后余下的立方体轮廓和Y节点所组成的图形,考察两组图形融合后,Y节点的深度情况;②三对连接Y的点的三条线是不连续的立方体,呈现一种逐渐变短的趋势,分别观察各组图形融合后,Y节点的深度变化。结果:①在实验1中,被试知觉到上面立方体的Y节点是突出来的,保证了一个完好的立方体结构,而下面立方体轮廓中的Y节点是凹进去的,离被试最远、②在实验2中,被试知觉到随着连接Y节点的三条线逐渐变短,Y节点的深度逐渐增加,以至最后完全陷了进去。结论:体视刺激的某些信息,当在单眼线索和双眼线索上发生了双重定义,且描述的深度信息不一致,便会产生视觉上的牵挂现象。Objective：To explore the hitching mechanism between the binocular and monocular cues in stereopsis.Methods：Ten healthy graduate students with normal or corrected sight were selected as testees from this university.The stimulus was presented on a corrected 23″ Planar SD2320W 3D LCD display.①In the first experiment,the stimulus were a pair of cubes with visible edges,a pair outline of cubes and a dot at Y junctions.Subjects were investigated the depth of Y junction when two pairs of stimuli fused.②In the second experiment,the stimulus were three pairs of incomplete cubes,and the contours of each pair were shorter than the next,Subjects were investigated when each pair of stimulus was fused,and the relative depth of Y Junctions was compared between each pairs.Results：①Results of the first experiment show that the Y junction above was convex with a perfect cube being perceived when the Y junction below was concave and farthest from subject.②Results of the second experiment show that the contours formed a Y junctions which were shorter and deeper and was much further from the cube.Conclusions：The hitching phenomenon of vision was formed when the information of stereopsis stimulus containing binocular and monocular synchronously was different.

关 键 词：单眼线索 双眼线索 立体视觉 

分 类 号：R318.04[医药卫生—生物医学工程]