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

近年来，3D显示的普及提高了理解具有凸/凹特征的3D对象的认知特征的必要性。本研究通过一些心理物理实验研究了三维物体对凸凹面特征的感知。该研究明确了从具有凸凹性的2D闭合轮廓中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回归表达式。此外，本研究还发现，特征被遮蔽的3D对象的凸可见部分的运动可以很容易地融合在一起。本研究还进行了基于路径范型的实验，以3D凸凹局部折叠面片为刺激元素，发现当路径沿线面片的凸凹性属性均匀时，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.