But regarding to complex object especially free-form object, it is difficult to achieve proper registration result because of the complexity of representation and low segmentation reliability.

但是对于复杂物体，特别是自由形态物体，由于描述的复杂性以及分割的低可靠性使得问题变得尤为困难。

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A simple topology model is presented to represent complex topology structure of free form surfaces to compose arbitrary object for reverse engineering.

首先给出能够表示任意多个自由曲面拓扑结构的描述，该模型可用于表示反求工程中的任意物体。

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