As its name implies, a face object represents a 2-d surface.
顾名思义，Face对象表示一个2 - D平面。
Master CAD drawing, knowledge chart, the 3 d modeling, curved surface has the certain basis;
熟练掌握CAD制图、识图，对三维建模、曲面有一定的基础；
D shape retrieval of object surface is an important problem in computer vision.
物体表面三维形状恢复是计算机视觉的一个重要研究内容。
D shape retrieval of object surface is an important problem in computer vision.
物体表面三维形状恢复是计算机视觉的一个重要研究内容。
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