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Identification of Faces in a 2D Line Drawing Projection of a Wireframe Object
October 1996 (vol. 18 no. 10)
pp. 1000-1012

Abstract—An important key to reconstructing a three-dimensional object depicted by a two-dimensional line drawing projection is face identification. Identification of edge circuits in a 2D projection corresponding to actual faces of a 3D object becomes complex when the projected object is in wireframe representation. This representation is commonly encountered in drawings made during the conceptual design stage of mechanical parts. When nonmanifold objects are considered, the situation becomes even more complex. This paper discusses the principles underlying face identification and presents an algorithm capable of performing this identification. Face-edge-vertex relationships applicable to nonmanifold objects are also proposed. Examples from a working implementation are given.

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Index Terms:
Line drawing interpretation, face identification, line labeling, 3D object reconstruction, nonmanifold geometry, image understanding.
Citation:
Moshe Shpitalni, Hod Lipson, "Identification of Faces in a 2D Line Drawing Projection of a Wireframe Object," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 18, no. 10, pp. 1000-1012, Oct. 1996, doi:10.1109/34.541409
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