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Methods of combining multiple classifiers and their applications to handwriting recognition

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3 Author(s)
Xu, L. ; Center for Pattern Recognition & Machine Intelligence, Concordia Univ., Montreal, Que., Canada ; Krzyzak, A. ; Suen, C.Y.

Possible solutions to the problem of combining classifiers can be divided into three categories according to the levels of information available from the various classifiers. Four approaches based on different methodologies are proposed for solving this problem. One is suitable for combining individual classifiers such as Bayesian, k -nearest-neighbor, and various distance classifiers. The other three could be used for combining any kind of individual classifiers. On applying these methods to combine several classifiers for recognizing totally unconstrained handwritten numerals, the experimental results show that the performance of individual classifiers can be improved significantly. For example, on the US zipcode database, 98.9% recognition with 0.90% substitution and 0.2% rejection can be obtained, as well as high reliability with 95% recognition, 0% substitution, and 5% rejection

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Systems, Man and Cybernetics, IEEE Transactions on  (Volume:22 ,  Issue: 3 )