COMMENTS:
SUMMARY:
Mathpad is a pen-based application created to draw mathematical equations and diagrams, and to help with problem-solving. Mapthpad uses gesture recognition and parsing in order to recognize mathematical expressions and perform editing operations.
The authors chose to use 3 recognition techniques to create their recognizer. The first technique involves normalizing and filtering strokes. The second technique seeks to reduce the number of possible recognized symbols using a combination of the calculated degree of difference between characters and the feature set classification. The last technique is a fine classification o distinguish similar symbols.
DISCUSSION:
I think the MathPad application is a very useful tool that applies some of the functionalities of Matlab, only with a sketch-based interface. The stroke grouping are done manually, wherein the user selects the set of strokes that make up an expression or a diagram. I think it would be beneficial if MathPad could perform its own grouping as I can imagine that the bounding-box grouping feature provided in Mathpad could get a little tedious. One feature I really like is that Mathpad allows users to make associations between expressions and diagrams in order to reflect changes from one associated element to the other.
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