Trevor Morley's Tache
Well-Known Member
Don't forget it's actually worse than that for an offside call.
Player sprinting towards goal can say cover 20cm in one frame. You then need to look at the gap created in that frame by the defender moving forward. Using your 20cm data, the potential is there for a 40cm gap from one frame to another. Added to the point where the ball actually leaves the players foot with the pass forward it's one monumental fuck up of a system.
I'd just scrap offside altogether. If the opposition want to stick someone in our box all game, go for it. Would make a change having to only break down 10 opponents in the 18 yard box rather than 11!
Considering the passing players foot is only in contact with the ball for approximately 0.01s or 1/100th of a second and the frame rate of the camera is 1/50th of a second per frame the system isn't even accurate enough to be able to calculate the exact moment the pass left the foot.
There is potential for a 40cm gap between attacker and last outfield opposition player, but the defender would be having to run at 10m/s in the opposite direction to the direction of play, so unlikely.