An empty football pitch is easy to map. The report says a camera in one corner, using a 90-degree viewing angle, could theoretically cover the whole surface.
Players change that calculation. Bodies create temporary blind spots, while the decisive detail may be the ball, a challenge behind the play or a defender’s position at the far post. The problem resembles the mathematical “art gallery problem”, which asks how many guards are needed to watch every part of a space.
A theorem from 1975 offers a limit for rooms with fixed corners. A football pitch has fixed boundaries, but its obstacles keep moving.
The report points to a 2009 study suggesting that 10 cameras could cover a specific setup involving 22 stationary players. That is a workable arrangement, not a universal answer.
Movement makes the problem substantially more difficult. Cameras do not see in every direction, players constantly alter sightlines and the best angle for one incident may be useless for the next. The report describes the wider problem as NP-complete, meaning that finding the most efficient solution becomes extremely difficult as the variables increase.
That is why a simple camera-per-player formula cannot deliver reliable coverage.
The reported World Cup configuration placed many cameras near the goals and along the halfway line, where penalties, goals and major transitions often develop. Slow-motion units add value after a collision or disputed finish, but only when the original angle is clear.
Calibration matters too. A poorly aligned camera can undermine video evidence regardless of the total count. Computer modelling can test positions, yet broadcast teams still rely on experience built across thousands of matches.
As automated tracking and video review develop, future tournaments may predict blind spots more accurately. The practical challenge will remain: combining mathematics, camera placement and human judgement before the next major incident unfolds.