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...Core metadata citation and similar papers at ac uk provided by brunel university research archive interpretation of overtracing freehand sketching for geometric shapes day chyi ku sheng feng qin david k wright school engineering design uxbridge ub ph daychyi abstract this paper presents a novel method interpreting sketch the strokes are interpreted as content used to generate d primitives approach consists four stages stroke classification grouping fitting tidy up with endpoint clustering parallelism correction in context first classified into lines curves linearity test it is followed an innovative process that handles separately grouped fitted geometry further tidied finally applied detect incorrect based on constraints suggest most plausible overall ensures sketched be meaningful output interface overcomes limitation where only single line drawing can out existing programs meanwhile more intuitive user keywords multistroke calligraphic introduction other hand system will also need i...