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Proceedings of CAD'14, 2014, 64-66
Feature Extraction from Sketches of Objects

Masaji Tanaka, Toshiaki Kaneeda, Okayama University of Science

Abstract. Generally line drawings as sketches of 3D objects are widely used in designing products. The automatic reconstruction of the solid model of an object from a sketch has been very crucial research area since decades. Most of proposed methods have applied the technique of line labelling. However, generally this technique could be difficult for the reconstruction when input sketches include many curves. Main references related to this paper are as follows. Company et al presented a survey about the reconstruction. Huffman-Clowes labelling was established for polyhedrons. Cao et al inferred the hidden structure of a polyhedron drawn in a sketch. Also, Malik handled curved objects. Although prior work indicated how to label curves in sketches, how to reconstruct solid models from sketches of curved objects was not indicated. On the other hand, Robert attempted to extract polyhedral primitives such as cubes from the sketches of polyhedrons to obtain 3D models. Also, Wang attempted to extract cylindrical primitives from sketches. However, their methods did not handle features such as holes and various kinds of fillets that are important shapes of products. In this paper, a method for the reconstruction by extracting features such as cubes, holes and fillets from sketches repeatedly is proposed. Basically we assume that a child firstly learns how to sketch primitives and features such as cubes, cylinders, holes, etc. of objects. In this method, primitives are included into features.

Keywords. Sketch, line drawing, feature extraction, reconstruction, solid model

DOI: 10.14733/cadconfP.2014.64-66