Summary
This paper introduces an image based approach to sketch recognition as the title suggest. In this method, is sketch is compared to the bitmap templates as 48x48 bitmap image. The rotation invariance is achieved using polar coordinate analysis. The method scored an overall %90 accuracy.
Discussion
This paper essentially discusses a grid based method. The idea is similar to "electronic napkin". I am actually surprised to see their %90 accuracy. I'd expect to be lower than that.
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