隨著科技進步，電子白板的應用已經漸漸被大眾所接受，但由於其成本較高，導致無法真正普及化，又近年來影像技術因電腦效能的提升，使得運用愈來愈廣泛，本論文以影像處理為基礎，搭配網路攝影機與紅外線光源實作出電子白板。
為了要能夠有效分辨出紅外光與可見光的不同，本論文使用可見光遮罩有效的濾除可見光，僅留下所需判斷的紅外光影像供演算法判別。剩餘的紅外光影像在處理過程中，系統運用膨脹-侵蝕以減少因雜訊而使訊號判別所產生的誤差。最後將訊號透過透視演算法轉換成滑鼠座標或者螢幕座標，而達到能夠控制滑鼠與多點控制的目的。由於對整張影像擷取紅外線光源訊號，會花費較長的時間，因此本文提出移動式遮罩與多重移動式遮罩來改善這個問題，實驗結果顯示無論是在控制滑鼠或者多點控制，都可以得到較佳的效果。

As technology advances, application of interactive whiteboard has become more popular. However, due to high cost it is not commonly available. Image technology in recent years, due to the improvement of computer efficiency, is applied in wide variety of uses. This thesis is based on image processing, implements the interactive whiteboard by matching webcam and an infrared light source.
In order to effectively distinguish between infrared and visible light, this thesis uses visible light filter which effectively filter visible light. It leaves only the infrared image to be treated through algorithmic recognition. Using remaining infrared image for image processing, the system uses dilation-erosion to reduce the error caused by noise. Finally, signals are converted to mouse or screen coordinates to achieve the purpose of controlling the mouse or multiple points of control. As the entire image captures the infrared light source signals, will take long periods of time, so this thesis use mobile-mask and multiple mobile-mask to rectify the problem. The experimental results show that both in control of the mouse or multipoint control, it can receive better results in implementing the interactive white board.

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