PURPOSE:To generate a faithful calligraphic style corresponding to the real motion of the tip of a brush by detecting the shift direction of a drawing stroke or the like from the writing locus of an input pen and deciding the pattern of a character with a brush tip form based on the detection. CONSTITUTION:When the character is written on a read surface by the input pen, the coordinate reader 1 sampling-outputs a coordinate showing the position of the pen at every prescribed time. A shift distance detector 2 calculates the shift quantity of the pen from the sample string of a coordinate value, output a sample at the time of detecting a shift more than a prescribed distance as a novel sampled value to a shift direction detector 3, and instructs direction detection. By such an instruction, the detector 3 detects the shift direction of the input pen with respect to the new sampled value and a pattern detector 4 decides the pattern of the character with the specified brush tip form, which is specially positioned and which is facing the specified direction, based on information from the detectors 2 and 3. The pattern is read from a pattern data memory 5, arranged and displayed in a display device 6, and the faithful calligraphic style corresponding to the real movement of the brush tip can be generated.
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