手绘运动学机构示意图识别及运动过程模拟  

Handwritten sketch recognition of kinematic diagram and simulation of motion

作　　者：李玲[1] 曹卫群[1] 

机构地区：[1]北京林业大学信息学院,北京100083

出　　处：《中国图象图形学报》2017年第11期1532-1543,共12页Journal of Image and Graphics

基　　金：中央高校基本科研业务费专项基金项目(2015ZCQ-XX)~~

摘　　要：目的为了解决手绘运动学示意图对辅助学习的局限性,以及现有物理辅助教学软件只能模拟系统设定机构的局限性,提出了一种对手绘运动学机构示意图进行识别,并实现其运动过程模拟的方法。方法首先提取笔画的几何特征进行笔画识别,得到笔画类型,然后根据构件笔画组成列表及笔画间相对关系,进行构件的匹配识别,再根据用户意图,识别构件间位置约束关系,自动矫正机构示意图中构件的相对位置,最后通过2维物理引擎,实现机构的运动过程模拟。结果实现了对运动学教学中常见的16种构件的识别,和构件中常用的7种图元的识别,识别准确率分别为93.25%、94%。结论实验结果表明,该方法可在对手写运动学构件符号以及构件间的约束关系进行正确的识别和矫正的基础上,实现对整个运动机构的识别,以及对机构运动过程的模拟。Objective The rapid popularization of hardware devices,such as intelligent terminals,has made makes it convenient to interact with the computer,thereby enabling people to initially enjoy the advantages of natural human-computer interaction.The increase in successful applications of many handwritten recognition systems has made sketch-based interactive technology with sketch and handwritten recognition a major research area.Teaching through computer aids has become the most commonly used teaching method and can effectively help students understand knowledge in the textbook better.Kinematics is a branch of theoretical mechanics and is the basis of various engineering disciplines.In kinematics courses,teachers usually use a handwritten or force diagram on the blackboard to help students understand the abstract principles or formulas.In the teaching process,students study most of the movements and the results through imagination;thus,they cannot intuitively feel and understand theoretical knowledge.Therefore,the abstract nature of theoretical knowledge and the difficulty in concluding the diagram lead to learning difficulties.At present,many achievements in the use of computer aids in physics courses have been made,but most of these achievements are based on images,videos,and other materials.Thus,teachers can only teach through display,which lacks interaction,and the teaching content and form are inflexible.Modern computer technology should be applied to solve the problems encountered in physics teaching.On the basis of the traditional teaching form,the advantages of modern computer technology should be fully utilized to construct an intuitive and flexible education model,which not only can help teachers explain the abstract physics theory but also can provide students with a flexible and active learning platform.Therefore,we provide a method to recognize the mechanism of the handwritten kinematics diagram and simulate the motion of the mechanism.Method On the basis of the analysis on the common mechanisms in the tea

关 键 词：手写识别 运动学示意图 位置约束 相对位置矫正 运动过程模拟 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]