Patent ID: 6226404
Filing Date: 2001-05-01
Classification: G06K

Abstract:
An on-line character recognition system having a pen-based input device for outputting data of a character pattern hand-written with a stylus pen on an input plane of the pen-based input device and outputting inclination angle information of the stylus pen in reference to the input plane, said on-line character recognition system comprising:a slant angle detector for obtaining a slant angle of the stylus pen from the inclination angle information, said slant angle representing an angle of vertical projection of the stylus pen on the input plane;a slant angle register for storing standard slant angle data of the stylus pen;a slant compensation section for outputting a compensated data set by compensating the data of the character pattern output from the pen-based input device making use of the slant angle obtained by the slant angle detector and the standard slant angle data registered in the slant angle register; anda character recognition section for recognizing a character represented by the compensated data set output from the slant compensation section,wherein said slant angle detector calculates an average slant angle of the character based upon a fixed time interval sampling of a plurality of stroke coordinates and said inclination angle information of said stylus pen at each sample timing.