A method and system for standardizing hand-drawn geometric figures

Abstract

The invention provides a method for standardizing hand-drawn geometric figures, comprising the following steps: (1) collecting the drawing track information between the starting point and the end point of drawing on the screen; (2) extracting the geometric feature parameters of the drawing track; (3) according to The geometric feature parameters of the drawn trajectory are used to calculate eight feature ratios for classification, and the eight feature ratios are compared with the corresponding feature ratio ranges of various types of geometric figures, and the geometric figures of the drawn track are determined according to the comparison results (4) Extract feature points and feature parameters according to the characteristics of different graphics on the drawing track of the determined geometric figure type, and complete the drawing; (5) Use feature points as hot spots for users to further modify graphics. The present invention also provides a system for realizing the above method. The invention effectively improves the redrawing accuracy of the geometric figures while retaining the user's personalized drawing of the geometric figures, and solves the problem that hand-drawn figures in classroom teaching are inaccurate and existing hand-drawn figure recognition cannot meet the needs of classroom teaching.

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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