形态图计算中的投影空间维数和投影空间模型

Dimensions and Models of Viewing Space for Computing Aspect Graph

确定投影空间维数和建立投影空间模型是计算机视觉领域中形态图计算时一个十分重要的基本问题。本文根据形态图计算时特征视图拓扑结构等价的特点，指出轴测投影下的投影空间是二维空间，透视投影空间为三维空间，并分别提出了投影空间模型的建立方法。

The establishment of dimensions and models of viewing space is quite important for computing aspect graph in computer vision.On the basis of the equivalent structure of the line drawing for computing aspect graph,it is shown that the dimension of viewing space is two dimensional space under orthographic projection and three dimensional space under perspective projection.Mean while,the method for establishing the model of viewing space is given,which makes the problem for computing aspect graph of objects simple.