Patent ID: 8077917
Filing Date: 2011-12-13
Classification: A63B,G01N,G06T

Abstract:
1. A system for producing a video signal representing a sports scene wherein, during at least a period, a ball moves in front of an essentially static background, the system comprising: an image recording means adapted to register a series of source images of the scene; a tracking means adapted to track a path of the moving ball through at least a sub-set of the images in said series, the tracking involving a differencing between consecutively registered images wherein image areas are identified that have been updated in a later registered image in relation to an earlier registered image; and a graphics generator adapted to, based on said source images, generate a composite image sequence wherein synthetic image elements are combined with the images in said series, such that a trace representing the path of the moving ball is shown in the form of added image data successively overlaid the image contents of the images in said series, wherein the tracking means is adapted to automatically identify an initial image position for the moving ball by: