| 摘要: |
| 计算机辅助教学系统目前已在教学中大量应用,然而,基于WIMP界面范式的电子课件系统,无法满足教师在课堂教学互动中需要与用户界面自然、高效、连续性交互的需求,尤其是几何教学中连续书写板书、自由勾画图形、动态几何定理演示等.设计和实现了一个基于笔交互的智能动态几何可视化白板系统.该系统以笔代替鼠标键盘,能够连续添加笔迹批注,勾画并识别几何草图,使用笔手势操纵界面元素,并通过扩展LIM0算法支持动态几何约束求解与动态几何可视化.讨论了该系统的框架及其关键技术,并给出了应用实例.可用性评估实验结果表明,该系统具有 |
| 关键词: 人机交互 笔式交互 草图用户界面 动态几何 计算机辅助教学 |
| DOI： |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant No.60703079(国家自然科学基金); the Natural Basic Research Program of China under Grant No.2006CB303105(国家重点基础研究发展计划(973));the National Science and Technology Supporting Program of China under Grant No.2006BAF01A44(国家科技支撑计划) |
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| An Intelligent Pen-Based Whiteboard System for Dynamic Geometry Visualization |
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REN Lei,YANG Hai-Yan,LIU Yuan-Yuan,MA Cui-Xia,TENG Dong-Xing
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| Abstract: |
| WIMP-Based electronic teaching systems can not meet teachers’ requirements of natural and efficient interaction, especially continuous drawing and writing in geometry teaching. In this paper, an intelligent pen-based whiteboard system (IPW) for dynamic geometry visualization is designed and implemented. IPW can be used to add handwriting, outline and recognize geometry and manipulate interface elements with pen gestures. Through extended LIM0 algorithm dynamic geometric constraint solving and dynamic geometric visualization are supported. This paper discusses IPW’s framework and its key technologies, and gives application examples. Experimental results show that IPW has higher task completion efficiency and user satisfaction. |
| Key words: HCI pen-based interaction sketch based interface dynamic geometry computer aided teaching |
