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Van Vo


Publications by Van Vo (bibliography)

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Apte, Ajay, Vo, Van and Kimura, Takayuki Dan (1993): Recognizing Multistroke Geometric Shapes: An Experimental Evaluation. In: Hudson, Scott E., Pausch, Randy, Zanden, Brad Vander and Foley, James D. (eds.) Proceedings of the 6th annual ACM symposium on User interface software and technology 1993, Atlanta, Georgia, United States. pp. 121-128. http://www.acm.org/pubs/articles/proceedings/uist/168642/p121-apte/p121-apte.pdf

A fast, simple algorithm for recognizing hand drawn geometric shapes is presented and evaluated. The algorithm recognizes (without regard to size) rectangles, ellipses, circles, diamonds, triangles, and lines. Each shape may consist of multiple strokes as long as they are entered without pauses. A pen-based graphic diagram editor employing this algorithm was developed on GO's PenPoint operating system. The editor will be part of a pen-based notebook system for teaching math to school children. The recognition algorithm was evaluated by ten subjects drawing a total of 200 shapes. It achieved a recognition rate of up to 98%.

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