Interpretation of over-tracing freehand sketching for geometric shapes

Sheng-feng Qin, David Wright, Ivan Jordanov

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

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.
Original languageEnglish
Title of host publicationFull Paper Proceedings of the 14th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG 2006)
EditorsJoaquim Jorge, Vaclav Skala
Place of PublicationPlzen
PublisherUniversity of West Bohemia
Pages263-270
ISBN (Print)9788086943039
Publication statusPublished - 2006
EventWSCG 2006 - 14th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision'2006 - Plzen
Duration: 1 Jan 2006 → …

Conference

ConferenceWSCG 2006 - 14th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision'2006
Period1/01/06 → …

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