Interpretation of over-tracing freehand sketching for geometric shapes

Qin, Sheng-feng, Wright, David and Jordanov, Ivan (2006) Interpretation of over-tracing freehand sketching for geometric shapes. In: Full Paper Proceedings of the 14th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG 2006). University of West Bohemia, Plzen, pp. 263-270. ISBN 9788086943039

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This paper presents a novel method for interpreting overtracing freehand sketch. The overtracing strokes are interpreted as sketch content and are used to generate 2D geometric primitives. The approach consists of four stages: stroke classification, strokes grouping and fitting, 2D tidy-up with endpoint clustering and parallelism correction, and in-context interpretation. Strokes are first classified into lines and curves by a linearity test. It is followed by an innovative strokes grouping process that handles lines and curves separately. The grouped strokes are fitted with 2D geometry and further tidied-up with endpoint clustering and parallelism correction.
Finally, the in-context interpretation is applied to detect incorrect stroke interpretation based on geometry constraints and to suggest a most plausible correction based on the overall sketch context. The interpretation ensures sketched strokes to be interpreted into meaningful output. The interface overcomes the limitation where only a single line drawing can be sketched out as in most existing sketching programs, meanwhile is more
intuitive to the user.

Item Type: Book Section
Uncontrolled Keywords: freehand sketching, multistroke sketching, calligraphic interface, design
Subjects: G900 Others in Mathematical and Computing Sciences
W200 Design studies
Department: Faculties > Arts, Design and Social Sciences > Design
Depositing User: Ay Okpokam
Date Deposited: 22 Dec 2015 09:46
Last Modified: 12 Oct 2019 19:34

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