Blind-handwriting Interface for Wearable Computing
This paper proposes a novel input interface that we call "blind handwriting" for wearable computing. The blind handwriting, which is a word similar to "blind typing" of keyboard, is a particular writing style where the user does not see the pen or the finger movement. Without visual feedback, written characters are distorted, as in the case when the user is blindfolded, and therefore existing on-line handwriting recognition systems fail to recognize them correctly. The sub-stroke based hidden Markov model approach is employed to tackle this problem. When the pen or touch pad is used as an input device, the proposed interface demonstrates a recognition rate of 83% on a test set of 61 people where each person wrote 1016 Japanese Kanji characters.