摘要： 现有相关工作不能适用于高自由度手绘图形自动教学。为此,提出一种基于开环、闭环线条的线条图形绘制质量模糊评价自动教学方法。定义具有高自由度绘制的开环、闭环线条及独特关系,给出知识图形的形式化结构,采用相似度方法对绘制结构进行粗放式识别。通过关键点、笔段、比例、角度、弧度及质心距离等对绘制质量进行模糊评价,识别差质并予以标记。教师-系统批改作业对比实验结果表明,该方法的结构识别、质量评价及差质标注等指标均达到实用要求,且指导意见客观,达到实用效果。

关键词: 线条图形, 手绘, 自动教学, 模糊, 结构识别, 质量评价

Abstract: For the existing related works cannot be applied to automatic teaching of hand-drawn graph with high freedom degree,this paper proposes an automatic teaching method for fuzzy evaluation of line drawing quality based on open-loop and closed-loop line graphs.This method defines a high freedom degree drawing of open-loop and closed-loop lines and their unique relationships.A formal structure of knowledge graph is put forward.It utilizes the similarity method to recognize the drawing structure roughly.Fuzzy evaluation of the drawing quality is carried out according to the key points,stroke segments,scale,angles,radians and centroid distances.The difference is identified and marked.The homework checking contrast experiments between teachers and system show that the structure identification,quality evaluation and differential label of the method can reach the practical requirement.The directive opinion is objective,which achieves practical effect.

Key words: line graph, hand-drawn, automatic teaching, fuzzy, structure recognition, quality evaluation

中图分类号: 

• TP391.41