Paper
Li, Wenzhe, and Tracy Anne Hammond. "Recognizing text through sound alone." Twenty-Fifth AAAI Conference on Artificial Intelligence. 2011.
Direct Link: http://www.aaai.org/ocs/index.php/AAAI/AAAI11/paper/download/3791/4119
Notes
This paper takes an interesting perspective on sketch recognition. We examine how sound may be used to identify different stroke types, letter in particular in this paper. Hopefully, this gives you an idea of how multiple features from multiple modalities may be used in recognition, as indeed they may be used by humans in certain contexts. In the future, we'll see how even more features, like the angle of the pen, may be used as a feature, and this paper fits in well with that conversation.
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