**a. Interface Layer**

The interface Layer consists of the PC desktop or the educational application. The user shall interact directly with the PC through the hand gestures to form different marker events (i.e. click, drag…etc.)

## **b. Tracking Layer**

This layer is the middle layer. It consists of the projector and the webcam. It helps convert the whiteboard to an electronic touch-screen, where any program can be controlled through hand gestures. The webcam will track the hand gestures through detecting pre-defined colors.
