Normalizing method and system of hand drawing geometric figures

Abstract

The invention provides a normalizing method of hand drawing geometric figures. The method comprises following steps of (1) collecting drawing track information between a drawing start point and a terminal point on a screen; (2) extracting geometric feature parameters of drawn tracks; (3) according to the geometric feature parameters of the drawn tracks, calculating eight feature values used for classification, comparing the eight feature values with feature ratio value regions corresponding to all kinds of geometric figure types, and according to comparison results, judging the geometric figure type of the drawn tracks; (4) extracting feature points and feature parameters on the drawn track in the determined geometric figure type according to features of different figures, and fishing drawing; and (5) using the feature points as hot points for future figure correction of users. The invention also provides a method for achieving the above method. According to the invention, while users can still personally draw geometric figures, re-drawing accuracy of the geometric figures is effectively improved; and a problem of a failure to meet classroom teaching requirements of hand drawing figures caused by inaccuracy of the hand drawing figures in classroom teaching is solved.

Description

technical field [0001] The invention belongs to the technical field of graphics, and more specifically relates to a method and system for standardizing hand-drawn geometric figures. Background technique [0002] The technical application of the normalization of hand-drawn geometric figures is very extensive, such as in the field of auxiliary teaching. In the classroom where the electronic whiteboard is used as the teaching medium, the teacher's use of hand-painted plane geometric figures cannot fully meet the teaching needs, and the use of professional drawing software has cumbersome steps and cannot adapt to the classroom rhythm. The standardization of plane geometric hand-drawn graphics is necessary and urgent in the teaching field. However, the accuracy and efficiency of plane geometric hand-drawn graphics recognition are still difficult to meet the classroom application, and there is also a lack of accurate and effective drawing methods. Contents of the invention [0...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and system for standardizing hand-drawn geometric figures, the purpose of which is to effectively improve the redrawing accuracy of geometric figures while retaining the user's personalized drawing of geometric figures. This solves the problem that hand-drawn graphic recognition cannot meet the needs of classroom teaching

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