Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23543
Title: Solid reconstruction from orthographic views using 2-stage extrusion
Authors: Shum, SSP
Lau, WS
Yuen, MMF
Yu, KM 
Keywords: Solid reconstruction
2-Stage extrusion
Extrusion-solid
Basic-solid
Excess-solid
Solution-solid
Filtering
Issue Date: 2001
Publisher: Pergamon Press
Source: Computer aided design, 2001, v. 33, no. 1, p. 91-102 How to cite?
Journal: Computer aided design 
Abstract: In this paper, a method called 2-stage extrusion is proposed to reconstruct a solid by modifying the incremental extrusion [Shum SSP. Solid reconstruction from orthographic opaque views using incremental extrusion. Computers & Graphics 1997;21(6):787–800; Shum SSP et al. A low-cost wireframe-to-solid implementation for reverse engineering. AUTOFACT'97 Conference, 3–6 November 1997, MS98(159), 1–7] for translucent object domain. The algorithm has two extrusion stages. In each stage, geometric entities from only three orthogonal views (viz. top, front and right) are used. The entities involve both solid and dashed lines in each view. In the first stage, an exterior contour region in each view is swept along its normal direction according to the corresponding object dimension. As a result, three extrusion-solids are produced. Intersection of the three extrusion-solids forms a basic-solid. Next, all interior entities of each view are treated by a filtering process. If all interior entities are discarded in the filtering, the second stage will be skipped and the basic-solid becomes a solution-solid. On the other hand, if any interior entity remains after filtering, they are processed in the second stage to generate an excess-solid. In this case, the basic-solid subtracts the excess-solid to form the final three-dimensional solution-solid.
URI: http://hdl.handle.net/10397/23543
ISSN: 0010-4485
EISSN: 1879-2685
DOI: 10.1016/S0010-4485(00)00079-8
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