"Tablet computers and smart phones already have software that can recognize handwriting based on language patterns and the relatively limited strokes for each letter. But creating better sketch-recognition software required MIT to combine information about the physical appearance of a final sketch with information about how it was drawn -- the system can recall which way a stylus was moving when it made any given stroke.
The MIT software then breaks down the drawn symbol into different parts such as horizontal, vertical or diagonal elements. Algorithms help clean up stray marks and enhance intentional strokes. And a database allows the system to compare drawn symbols to known symbols."
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