Character recognition method

Details Character recognition method Character recognition method

1995-01-18

1998-04-28

Boudreau, Leo

Image analysis

Pattern recognition

Template matching

382187, 382202, G06K 948

Patent

active

057455996

ABSTRACT:
The present invention provides a handwritten character recognition method in which neighboring points are connected by straight lines and the segments in-between points are then interpolated using broken lines. Each broken line is equally divided into k segments, and a number is assigned to each division point therein according to the time sequence of the respective point. A (k+1)N.times.N (N is the number of strokes) matrix P consisting of the elements of row (k+1)(n-1)+1 and column k(m-1)+j comprising angle .OMEGA. formed by the straight line connecting division point i of stroke n and division point j of stroke m and the straight line connecting division point i of stroke n and division point j+1 of stroke m, is then calculated. The distance di between handwritten character Cx and matrix Qi (i=1-M) formed in the same manner from M templates corresponding to characters possessing the same number of strokes as character Cx, is calculated as the sum of the squares of each element of matrix P-Qi. The character Cz corresponding to the template Qz with the smallest distance dz is then selected as the recognition result.

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The State of the art in on line handwriting recognition, Tappert et al., Aug 1990, IEEE Transactions on Pattern Analysis & Machine Intelligence vol. 12, No. 8, pp. 787-808.

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