Research on educational system "VisionDesk" by information projection and sharing

作为替代目前广泛使用的基于web的电子学习系统的一种新型教育系统，我们提出并开发了桌面信息投影与共享系统“VisionDesk”。我们首先制作了一个原型，并实现了笔板式液晶显示器。但是，我们得到的结果是，用指尖操作适合于自然直观的操作。因此，我们在下一阶段开发了用网络摄像头检测上色的指尖的多点识别方法。此外，我们还实现了手势界面。通过对原型模型的实验，得到了在一次点击和各种拖动操作中识别参数的最优值。在最后阶段，确定了网络摄像头的识别从正面方向转变为天花板方向，多点识别在正面方向的同时也用上色的指尖进行操作。

As a new educational system that replaces of the e-learning system of the web base used widely at present, we proposed and developed a desk information projection and shared system "VisionDesk". We made a prototype that was implemented with the pen-tablet type liquid crystal monitor at first. However, we obtained the result that the operation with the tip of a finger is suitable for natural and intuitive operation Therefore, we developed the multipoint recognition method by the detection of the tip of a finger of coloring with a web camera at the next stage. Additionally, we implemented the gesture interface. The optimum value of the recognition parameter in a click and various operations of drag were obtained by experiment with a prototype model. In the final phase, it was confirmed that recognition with the web camera was changed from the front direction to the ceiling direction, and the multipoint recognition operated with the tip of a finger of coloring as well as the direction of the front.