Wenzhe Li
Summary:
The paper presents a a dual-view, multi-stroke sketch recognition environment for class diagrams in UML, called Tahuti. It is a geometry-based method to give users more freedom to draw and edit.
The multi-layer framework includes processing, selection, recognition, identification. The main idea is to find any possible collection of strokes, then recognize and identify. In order to reduce the burden of grouping, the framework rules out a lot of impossible collections by setting the maximum number of strokes in a collection and setting some restriction on each stroke.
Then the author introduces some recognition method for basic shape, like rectangle, ellipse.
The experiment shows that Tahuti is the most welcomed by users compared with other systems.
Discussion:The idea of grouping is really good. It does not require users to draw an object in a specific manner. Also, the author find some methods to reduce the amount of collections, which allow the computer to run the program in real time. I see the same idea in the CivilSketch code.
However, in this paper, there is no accuracy about recognition rate. We do not know whether the system really works well. There should be a test on its geometric method.
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