Characteristics of visual cognition for 3D object with convex/concave features

随着三维显示技术的日益普及，对具有凸/凹特征的三维物体的认知特征的理解势在必行。本研究通过一些心理物理实验来研究三维物体的凸/凹特征感知。本研究通过所呈现的具有凸和凹的二维闭合轮廓，阐明了感知到的物体的三维结构，并利用闭合轮廓的几何特征得到了回归表达式。此外，本研究还发现，在特征被遮挡的3D物体中，可见部分的运动是凸的，而不是凹的，可以很容易地进行整合。以三维凸/凹局部折叠斑块为刺激元素，进行了基于路径范式的实验，结果表明，当路径沿线斑块的凹凸属性均匀时，路径检测的正确率较高。

Recent popularization of 3D display rises the necessity to comprehend the characteristics of cognition for 3D objects with convex/concave features. This study investigated the perception of convex/concave features in 3D objects through some psychophysical experiments. This study clarified 3D structure of objects perceived from the presented 2D closed contours having convexities and concavities, and obtained regression expression using geometric features of closed contours. In addition, this study found the phenomenon that motions of convex rather than concave visible parts of 3D objects whose features are masked can be easily integrated. This also study performed the path-paradigm based experiment using 3D convex/concave local folded patches as stimuli elements, and revealed that correct rate of path-detection become high when attribute of convexity/concavity of patches along the path are homogeneous.