Using the Optical Flow to Implement a Relative Virtual Mouse Controlled by Head Movements

The following paper introduces the work conducted to create a relative virtual mouse based on the interpretation of head movements and face gesture through a low cost camera and the optical flow of the images. this virtual device is designed specifically as an alternative non-contact pointer for people with mobility impairments in the upper extremities and reduced head control. the proposed virtual device was compared with a conventional mouse, a touchpad and a digital joystick. validation results show performances close to a digital joystick but far away from a conventional mouse.