Abstract: An automatic line officiating system including a video camera and associated optics and electronics disposed adjacent to a line to be officiated and arranged with the longitudinal axis of its field of view concentric with the line and adapted to provide image data representing the vicinity of the line and a central processing system coupled to the video camera and arranged to receive the image data from the camera, to process the data to determine the path of the ball before, during and after a bounce, and to provide an indication whether the ball has bounced on or within the line, or outside the line.