基于笔式交互的几何教学系统原型

Pen-based interactive geometry teaching system prototype

设计并实现了一个基于笔式交互的几何教学白板系统原型,该系统允许用户以笔代替鼠标在界面上批注勾画,草绘输入图元,手势编辑界面元素,并支持动态几何。为提高真实感和交互效率,系统中引进了线消隐和笔画规整技术,这也是同类系统少有的。对系统的框架和关键技术进行了讨论,最后给出了系统可用性评估,实验显示系统能够达到理想效果,有较高的实用性。

This paper designed and realized a pen-based geometry teaching whiteboard system prototype （PBS）. PBS allowed user to add handwriting, outline and recognize geometry and manipulate interface elements with pen gestures. It also supported dynamic geometry. In order to enhance the realistic and the interactive efficiency, the system introduced the hidden line removal and the stroke beautification technology, which was unusual compared with the other similar systems. This paper gave the discussion on the system’s frame and key technologies, and finally gave the usability assessment of PBS.The experiment proves that PBS can achieve the ideal effect, and has the high usability.