|Seven cameras track the ball from every angle. (FIFA image)|
The 2015 FIFA Women’s World Cup, currently underway in Canada, is drawing record television audiences around the world. It’s also another milestone for goal-line technology (GLT), which is quickly gaining acceptance.
In the group stage, which ended on 17 June, FIFA reports that GLT was used to award goals by Mexico in a 1-1 draw with Colombia, by Thailand in a 3-2 win over Ivory Coast, and by Costa Rica in a 2-2 draw with Korea. Also, it confirmed a save (no goal) on a header by Meghan Klingenberg in the USA-Sweden game, a scoreless draw.
The Hawk-Eye GLT system consists of seven cameras positioned strategically at each end of the stadium, to track the ball precisely from every angle. Within one second of a play at the goal line, a signal is relayed to the referee’s watch to confirm the goal. It is reputed to be accurate within 1 mm. Hawk-Eye was selected for this year's tournament in March.
Last year’s men’s World Cup in Brazil was the first to use GLT – with a different system, GoalControl, which uses a similar seven-camera setup. France was the first to benefit from it, when an inconclusive goal was confirmed in a match against Honduras. Hawk-Eye had competed for last year's men's World Cup, but lost out to GoalControl.
SPIE Newsroom explored goal-line technology in 2012 when the technology was being considered by FIFA's rule-making body, the International Football Association Board (IFAB).