ITK 提供了一个支持形态模型结构的类的层次。这个层次有SpatialObject作为基本类。

很多基本的范函性被定义在这个水平，包括评估一个给定点是在模型的内部还是外部的能

力，通过创建基本形态的分等级聚集形成复杂的形态，支持基本的空间参数如比例、原点和

位置。-ITK provides a hierarchy of classes intended to support the construction of shape models. This

hierarchy has the SpatialObject as its base class. A number of basic functionalities are defined

at this level, including the capacity to evaluate whether a given point is inside oroutsideof

the model, form complex shapes by creating hierarchical conglomerates of basic shapes, and

support basic spatial parameterizations like scale, orientation and position.