The measurement of the angle of a user’s head in a novel head-tracker device

The measurement of the angle of a user’s head in a novel head tracker is presented. From the image of multi-light-sources the computer transforms the total positions into polar coordinates and determines the angle of the swinging head to improve the performance of mouse operation. Once the user has finished system adjustment and remained at the same distance, the user can precisely control the mouse to any position for any distance. This system can create the head’s dynamic motional space using the relative positions of multi-light-sources. If the user is closer to the monitor, the user will achieve better system performance. This is great improvement on the inaccuracy of previous head-control systems and the angles of user’s head swimming can control the speed of the cursor. This head tracker is more precise and has superior performance, especially for the icon clicking of a computer operation.