New grouping and fitting methods for interactive overtraced sketches

Wang, Shuxia, Qin, Sheng-feng and Gao, Mantun (2014) New grouping and fitting methods for interactive overtraced sketches. The Visual Computer, 30 (3). pp. 285-297. ISSN 0178-2789

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Official URL: http://dx.doi.org/10.1007/s00371-013-0844-y

Abstract

This paper describes a new method for recognizing overtraced strokes to 2D geometric primitives, which are further interpreted as 2D line drawings. This method can support rapid grouping and fitting of overtraced polylines or conic curves based on the classified characteristics of each stroke during its preprocessing stage. The orientation and its endpoints of a classified stroke are used in the stroke grouping process. The grouped strokes are then fitted with 2D geometry. This method can deal with overtraced sketch strokes in both solid and dash linestyles, fit grouped polylines as a whole polyline and simply fit conic strokes without computing the direction of a stroke. It avoids losing joint information due to segmentation of a polyline into line-segments. The proposed method has been tested with our freehand sketch recognition system (FSR), which is robust and easier to use by removing some limitations embedded with most existing sketching systems which only accept non-overtraced stroke drawing. The test results showed that the proposed method can support freehand sketching based conceptual design with no limitations on drawing sequence, directions and overtraced cases while achieving a satisfactory interpretation rate.

Item Type: Article
Uncontrolled Keywords: Overtraced stroke, vector graphics, grouping, fitting, freehand sketch, 2D interpretation
Subjects: W200 Design studies
Department: Faculties > Arts, Design and Social Sciences > School of Design > Design
Faculties > Arts, Design and Social Sciences > School of Design > Design
Faculties > Arts, Design and Social Sciences > School of Design > Design
Depositing User: Becky Skoyles
Date Deposited: 19 Mar 2014 12:27
Last Modified: 10 Aug 2015 11:02
URI: http://nrl.northumbria.ac.uk/id/eprint/15856

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