I want to build an interactive whiteboard which uses an infrared ped. I want to use a camera to track IR position on the projection screen. I plan to keep the camera a little further away from the laptop. So what will be the best way (wifi/bluetooth/usb) to get the continous video input from camera? I am worried that if the video input is slow then processing (using openCV) the image to track the IR position will be slow. I want to track the IR pen in real time.
What would be the fastest way for to achieve this? Should I buy a IP camera or build one from raspberry pi? Or Usb webcam will be better?