We recently undertook an exercise to test the accuracy of our optical tracking technology, with an emphasis on both positional and physical data outputs. During the exercise we simulated the FIFA EPTS test process and assessed the accuracy of our data versus that provided by GPS wearables.
Testing was based on FIFA’s EPTS (Electronic Performance and Tracking Systems) certification process, which represents the industry standard for wearable and optical tracking technology in football. They were carried out at the fantastic Daejeon Stadium, home to K League side Daejeon Hana Citizen and the location of several games played during the 2002 FIFA World Cup.
The results provided us with further evidence of the accuracy of the Bepro system. Our outputs very closely matched ground truth measurements and were superior to those collected by a leading GPS wearable device provider.
The Test in More Detail
In order to measure the ability of our camera and computer vision technology to accurately measure physical positions, we measured out an area of the pitch (30m x 30m). This area was used for two main tests.
- The EPTS test circuit. Here a number of individuals followed the route used in the FIFA test to measure positional, as well as physical data accuracy. We placed markers in pre-defined positions and then captured their movements through our Fixed Camera System.
- We also played a 2 vs 2 match, lasting five minutes. Here our test players also wore GPS tracking devices. This provided us with a clear comparison between the positional accuracy of the Bepro system and the GPS devices, versus the actual ground truth.
Why Use Optical Technology?
We made an early decision in our existence to focus our efforts on developing optical tracking technology. Although both GPS and optical methods have existed for years, we’ve always believed that optical tracking technology is the superior option.
- There have always been some accuracy issues with GPS technology. When we carried out our test, we found there were many occasions where the GPS result was several metres out when compared to the ground truth. Our optical tracking provided a much more accurate, consistent result.
- With a team having to use an individual device for each player, there’s an increased chance that a device may be faulty. This could lead to inaccurate or incomplete (or even no) data. This is of course if a player is happy to wear a device in the first place! Having to invest in multiple devices also increases costs.
- Optical technology provides data for both the home and away sides. Therefore, fair comparisons can be made with regards to physical output and positional data can be used to provide additional insight. Pressure and formation can be better understood for both teams, providing more data than can be used to improve team performances.
This test proves the accuracy of the data captured through our Fixed Camera System. The below animation further illustrates this by comparing our system’s tracking data to that provided by a system requiring several camera installations around the field of play.
Why pay more for such a system?
Our Tracking Technology
At Bepro we are continually developing our optical tracking technology. Through our Fixed Camera System, we capture a panoramic view of the pitch by stitching together three camera feeds. Computer vision algorithms are then applied to the panoramic video from which the position of each player and the ball is measured 30 times a second. This produces about 3.4 million data points per game.
In order to develop our algorithm, we have collected player’s visual data from stadiums around the world. This allows us to detect and track players in any game situation.
We also apply different logics to the positional data to calculate physical metrics, including distance and speed. We are also able to calculate run intensity/velocity.
Our mission is to continue to improve the accuracy of our technology even further and develop more physical metrics. We are proud of our progress but know we have only begun to scratch the surface! We want to make tracking data accessible to more and more clubs to provide them with information that helps them measure, understand and improve performances.
Additional Content
Watch the circuit and 2 vs 2 small match test videos below.
At Bepro, we work to develop performance tools that make a real difference to clubs round the world. We bring together a real understanding of football, the ability to develop intuitive tools powered by advanced technology and a customer-focused approach to help teams measure, understand and improve performances. Get in touch through contact@bepro11.com to find out how we can help you.
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