Abstract
This paper describes the input device using recognition of pointing motion with the index finger by image processing technique. The pointing motion is made clear from the state (bend or stretch) of the index finger as follows. Firstly the hand shape is measured at a 0.1-second interval by two CCD cameras which are set up at the side and the top. Secondly the positions of forearm center, the index fingertip, and the index metacarpophalangeal joint are calculated from the contour feature that is extracted from each hand image. Finally the pointing direction is estimated from two regression lines which are calculated from the contour feature data between the index fingertip and the index metacarpophalangeal joint.
