Handwritten Chinese character identification method irrelevant to rotation direction

Abstract

The invention provides a handwritten Chinese character identification method irrelevant to rotation direction. A user writes Chinese characters through handwritten input equipment and information processing equipment converts acquired Chinese character images into corresponding Chinese character internal codes. The identification method comprises the following steps: (1) carrying out a first correction on an input character in rotation direction and the first correction ensures that the initial point of the input character is positioned in the upper left part of a character image; (2) carrying out a second adjustment on the input character in rotation direction and the second adjustment determines the directional main axes of the character in horizontal direction, 45-degree oblique direction, vertical direction and 135-degree oblique direction; calculating the true main axes of the input character relevant to the directional main axes, and if the true main axes and the directional main axes are not overlapped, rotating the character to overlap the main axes; and (3) carrying out identification on the character images corrected (adjusted) during step (1) and step (2) through a classifier to acquire a character identification result.

Description

Technical field [0001] The invention belongs to the technical field of handwritten Chinese character recognition using computer pattern recognition technology, and in particular relates to a handwritten Chinese character recognition method independent of rotation direction. Background technique [0002] Handwritten Chinese character recognition generally refers to a recognition technology in which a user writes Chinese characters through a handwriting input device (such as a handwriting pad, touch screen, mouse, etc.), while the computer converts the Chinese character writing track collected by the handwriting input device into the corresponding Chinese character machine internal code. Traditional handwriting recognition technology usually uses single-character recognition. However, these traditional handwriting recognition input methods are not rotation-independent. They require users to write characters that cannot exceed a certain angle, otherwise its recognition rate will not ...

AI Technical Summary

Problems solved by technology

Traditional handwriting recognition technology usually adopts single-character input method, but these traditional handwriting recognition input methods are not rotation-independent. It requires that the characters written by the user should not exceed a certain angle, otherwise its recognition rate will suffer. To ensure that, generally speaking, when the input characters are inclined more than 30 degrees, the input characters are often not recognized correctly, that is to say, for these inclined characters, the recognition rate of the traditional input method is very low, which limits The direction of the user's handwriting input cannot meet the needs of the user's free writing

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