Hawk-Eye is not infallible, but is advertised to be accurate to within 3.6 millimetres and generally trusted as an impartial second opinion in sports. It has been accepted by governing bodies in tennis, cricket and association football as a means of adjudication. Hawk-Eye is used for the Challenge System since 2006 in tennis and Umpire Decision Review System in cricket since 2009. The system was rolled out for the 2013–14 Premier League season as a means of goal-line technology. In December 2014 the clubs of the first division of Bundesliga decided to adopt this system for the 2015–16 season. ![]() Īll Hawk-Eye systems are based on the principles of triangulation using visual images and timing data provided by a number of high-speed video cameras located at different locations and angles around the area of play. The system rapidly processes the video feeds from the cameras and ball tracker. ![]() In each frame sent from each camera, the system identifies the group of pixels which corresponds to the image of the ball.Ī data store contains a predefined model of the playing area and includes data on the rules of the game. It then calculates for each frame the position of the ball by comparing its position on at least two of the physically separate cameras at the same instant in time.
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