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Visual input for pen-based computers

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2 Author(s)
Munich, M.E. ; Vocalpoint Technol., San Francisco, CA, USA ; Perona, P.

The design and implementation of a camera-based, human-computer interface for acquisition of handwriting is presented. The camera focuses on a standard sheet of paper and images a common pen; the trajectory of the tip of the pen is tracked and the contact with the paper is detected. The recovered trajectory is shown to have sufficient spatio-temporal resolution and accuracy to enable handwritten character recognition. More than 100 subjects have used the system and have provided a large and heterogeneous set of examples showing that the system is both convenient and accurate

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:24 ,  Issue: 3 )