Accurate and Reliable
During ITF testing in 2006 Hawk-Eye made the correct call in 100% of all tests, showing an average error of only 3.6mm. The system recorded 100% of all rallies.
Tests have always been conducted outdoors, encompassing situations that take the following factors into consideration:
Wind (and therefore camera wobble);
Bright sunlight at different times of the day;
Shadows covering part or the majority of the court;
Dark or overcast conditions;
Indoor venues are obviously easier in which to track because conditions are far less variable. Quite simply, Hawk-Eye can track accurately and reliable in any conditions, on any surface.
Although the accuracy of the existing system has been tried and tested, the company is constantly trying to develop and refine the system. Hawk-Eye listens to feedback from customers and officials to ensure that Hawk-Eye remains the very best in the market.
How does it work?
Vision processing is used to identify the centre of the ball within each frame of each camera. Camera movement is compensated for by also tracking the lines of the court.
The system triangulates the information from each calibrated camera to provide the 3D position of the ball.
This process is repeated for each frame so that the 3D positions of the ball can be combined to produce a single trajectory of the flight of the ball.
The trajectory is then used to calculate at exact bounce contact area the ball made with the court.