There has been a lot of technological advancements in the world of sports, be it in the method used to make a football, to how a player’s stats are measured & studied, to how a referee can now tell if a ball has completely crossed a line thanks to something buzzing on his wrist.
Here is a quick look at four goal-line technologies, all trying to help the referee call a goal, with completely different methods to arrive at the same conclusion.
GoalControl-4D was successfully tested at the Confederations Cup and the FIFA Club World Cup in 2013. After which the German company gained approval and certification ahead of Hawk-Eye to be used at the 2014 FIFA World Cup.
It uses 14 high-speed cameras mounted on the stadium roof or catwalk (7 per goal mouth) to capture the positioning of the ball in the air and on the pitch. When the ball passes the goal line, the referees receive a notification on their watches.