Non-keyboard Input of Japanese Text On-line Recognition of Handwritten Characters as the Most Hopeful Approach

概要

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Among non-keyboard input methods for Japanese text, on-line recognition of handwritten characters is surveyed as the most hopeful approach. Its technical advantages are discussed in comparison with speech recognition and optical character recognition. Research activities of on-line recognition are divided into four generations including two times of hot periods. The first generation was expected to establish the technology soon, but realized how noisy and distorted human writing patterns were. The second was devoted to steady researches for recognition of such human patterns under certain constraints. The third is characterized by hot activities to make products of script recognition as well as researches to liberate writing constraints based on remarkable progresses in hardware. The latest generation studies intrinsic problems of pattern recognition in the domain of on-line recognition. The survey is aimed exhaustive. Throughout the generations, considerable efforts have been made to relax constraints on character patterns to be recognized. Stroke order free and number free recognition has been sought. At present, however, a method free from the one constraint is not completely free from the other. Other issues also remain for on-line recognition to be employed for general text input. Nevertheless, handwriting input has potential merits unmeasurable by performance or cost-effectiveness.
一般社団法人情報処理学会の論文
1990-03-31