The method of movement-velocity calculation of viewer by using two eyes image for 3D display for multiple viewers

We calculate the moving velocity of a viewer by using two eye images obtained at different times through the camera. This process is necessary for the future 3D display technique, in which a moving viewer can see a 3D image continuously. We first extract two eyes image and calculate the pixel coordinate of the center point between the two eyes. Next, we calculate the moving velocity in two dimension by comparing the two center point coordinates obtained at different times.