封闭图形是指在所在维度中处于封闭状态的图形，如平面图形中的三角形、正方形等；在三维空间中的球体、正方体等。
视图轮廓信息和封闭图形信息在图形处理中有着重要的作用。
The outline information and closed graph information of view plays an important role in processing graphics.
这些名词所共有的中心意义是。包围着一个封闭图形或区域的线。
The central meaning Shared by these nouns is. A line around a closed figure or area.
针对大规模空间封闭图形的高效识别，考虑与识别有关的各个阶段，给出基于转向法的空间封闭图形识别总体方案。
Aiming at efficient recognition of large-scale closed space graph, an overall scheme of recognition based on turning is given, considering the various stages related to recognition.
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