Interpreting line drawings of objects with K-vertices

Varley, P., Suzuki, H. and Martin, Ralph Robert 2004. Interpreting line drawings of objects with K-vertices. Presented at: Geometric Modeling and Processing 2004, Beijing, China, 13-15 April 2004. Geometric Modeling and Processing 2004 : proceedings. Los Alamitos, CA: IEEE Computer Society, pp. 249-258. 10.1109/GMAP.2004.1290046

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Abstract

As part of the goal of automatic creation of B-rep models of engineering objects from freehand sketches, we seek to take a single line drawing (with hidden lines removed), and from it deduce an initial 3D geometric realisation of the visible part of the drawn object. Junction and line labels, and provisional depth coordinates, are key parts of this frontal geometry. Many methods for producing frontal geometry only work correctly for drawings of trihedral objects. However, nontrihedral k-vertices commonly occur in engineering objects. We analyse the performance of a line-labelling method applied to k-vertices, and show why methods ignoring geometric considerations are inadequate. We give a new approach which produces both junction labels and provisional depth coordinates without any prior knowledge. Our results show that even a naive implementation outperforms previous methods.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Computer Science & Informatics
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Uncontrolled Keywords:	3D geometric realisation ; B-rep models ; automatic model creation ; engineering objects ; freehand sketch ; frontal geometry ; junction labels ; line drawing interpretation ; line-labelling method ; nontrihedral k-vertices ; provisional depth coordinates ; trihedral objects
Additional Information:	© (2004) IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. PDF uploaded in accordance with publisher's policy http://www.ieee.org/documents/author_version_faq.pdf [accessed 10/12/2014]
Publisher:	IEEE Computer Society
ISBN:	9780769520780
Date of First Compliant Deposit:	30 March 2016
Last Modified:	18 Nov 2023 10:08
URI:	https://orca.cardiff.ac.uk/id/eprint/43960

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