Method for identifying hand-writing characters

Abstract

The present invention provides an integrated handwritten characters identification method based on off-line identification method and on-line identification method. Its off-line identification method mainly includes elastic grid characteristics extraction technique of Chinese character stroke contour directional corner characteristics and linear discriminant analysis (LDA) to make higher-dimensional characteristics undergo the process of dimensionality reduction; and the on-line identification method mainly includes fuzzy extraction of Chinese character stroke direction characteristics and a stroke template elastic matching method with stronger variability. Said invention can greatly raise identification effect of handwritten Chinese characters.

Description

technical field [0001] The invention belongs to the technical field of pattern recognition and artificial intelligence, and in particular relates to a handwritten character image recognition processing method. technical background [0002] Online recognition of Chinese characters means that the user recognizes while writing. It generally refers to the recognition technology that the user writes Chinese characters through a handwriting input device (such as a tablet, touch screen, mouse, etc.), and at the same time, the computer converts the Chinese character writing track collected by the handwriting input device into the corresponding Chinese character machine internal code. According to the degree of writing restrictions, it can generally be divided into: restrictive handwriting (such as restricted stroke order, horizontal and vertical, without continuous strokes), handwritten printed (referring to neatly written Chinese characters), cursive handw...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing Chinese character recognition methods are based on Chinese character strokes for recognition, such as Chinese invention patent No. 98106953.3 "Handwritten Chinese character recognition method and device", No. 98108373.0 patent "Text recognition device and character recognition method" and No. 98122949.2 patent " A Handwritten Character Recognition System Without Stroke Order” and other patents rely on the correct extraction and recognition of strokes, while cursive handwritten Chinese characters are not only written with consecutive strokes, most of the strokes are seriously deformed, and many short strokes will be saved. Go, so the above recognition methods can not solve the recognition of cursive handwritten Chinese characters well

[0004] In China Invention Patent No. 93101683.5 "Free Writing Online Handwritten Chinese Character Recognition Method and System", it is also mentioned that the existing font structure recognition method based on strokes or stroke segments is difficult to deal with Chinese characters that cannot be decomposed into stroke segments. It is characterized in that two recognition methods for recognizing Chinese characters with different writing styles are combined, one is used to recognize regular script and some cursive script, and the other is used to recognize irregular ligatures, and the recognition method proposed in this patent is combined using a Serial way, i.e. use the former method to identify first, and then use the latter method to identify after rejection

The disadvantage of this method is that only one recognition method is used for the recognition of irregular ligatures, and the disadvantage of the serial combination recognition method is that if a cursive Chinese character is not rejected, it will not be recognized. Use the latter recognition method to recognize irregular ligatures for recognition

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