Using only a Microsoft Kinect, a laptop, and LabVIEW, BYU-Idaho undergraduate engineering students Kevin Smith and Bryce Perry built an application that acts as a virtual whiteboard. The Kinect depth sensor tracks where a person is in the field and overlays it on the video image.
The user can easily change the color of the drawing, clear the whiteboard, and edit the threshold for picking up where to draw based on the size of the room. As shown in the video, the system can easily handle multiple users drawing at the same time, and any object can be used as a stencil.
The best part? It only took Smith and Perry about two hours to get a working prototype of the system, and about six more hours to fine-tune the whiteboard to the point seen in the video.