数字黑板系统的研究与实现

在教学过程中教师通常只能使用计算机和数字投影机“展示”事先准备好的电子教案和电子素材,无法进行有效的互动和板书;互动式电子白板虽然可以实现黑板功能,但是受到工作区尺寸的限制,无法在常规教学中广泛使用。针对上述问题,基于人机交互中的笔交互技术、Agent技术,设计并实现了一个数字黑板系统,并将线框几何模型技术和图形约束技术应用其中。系统工作时,使用投影机投影做大尺寸黑板板面,有效地解决了问题。该系统不仅实现了互动式电子白板的功能,同时也实现了一些附加的功能,如在计算机屏幕上直接进行标注和突出显示、黑板视窗、辅助绘图等功能,具有较好的应用前景。

Research and Implementation of Digital BlackBoard System

With the wide spread use of computer in school,more and more teachers use PC and projector in their lectures.But they can only present the prepared material.Although the interactive E-whiteboard has the function of traditional blackboard,it does not have enough working area for the normal classroom lectures.To solve the problem,designed and implemented a digital blackboard system,which based on pen user interface and Agent,and applied technique of wireframe mode geometry modeling also.This system uses large projection to show lecture contents,and provides some additional functions,such as annotating the current display,blackboard view,computer aided drawing,and so on.The system will have a good future.