Hand gesture based user interface for computer using a camera and projector

In this paper, we propose a hand gesture based human computer interaction system comprising of a webcam and a pocket projector. The projector projects the display on the wall on any other plain surface. User can interact with the projected screen using his fingertips which are tracked in air by the camera using `Camshift' tracker. A comparative study of different methods of hands and fingertips detection has been made. A robust method has been developed to detect and recognize single stroke gestures traced with fingertips, which are then translated into actions.