If we consider that the top players are more than capable of sprinting at >20mph (8.94m/s), and the frame rate of VAR is 50fps then 1 single frame difference at 20mph is a huge margin of error (17.9cm), and that 5cm margin pales into insignificance.
Even running at 10mph (4.47m/s) the 50fps camera gives a single-frame margin of error of nearly 9cm, so for them to spout a 'tolerance' is laughable.
Thanks for that. The "secrecy" is the crux of the matter I think. There is no reason not to be transparent, unless there is something to hide. Hence the continual conspiracy theories.You get sent the FA interpretations which basically outline how FIFA expect you to ref any game. You certainly could get them on line in the past. The problem is your elite refs then get sent the PL interpretations which sometimes differ to the FIFA laws. Recent ones I can think of is the handball law and off side. Why do the PL think they are above the actual laws is a mystery?
I'm not sure technology is going to improve.True - but it's a compromise. I believe the clubs had to agree on it, and they're not all going to be as clued up, or even may not want something that can look more controversial, even if it's correct (or depending on how they play, the cynic might suggest some don't want to give attackers more advantage).
Ultimately, it's always going to be more accurate than an assistant with a flag, and will improve as technology improves.
Apart from the above arguments why does it take so long to come up with a decision when we are involved.The problem is that offside decisions don't only happen at high speed, they also happen at virtual standstills.
And if you made the tolerance 10cm then in those situations you'd start to have offsides that look obvious to the human eye being given as onside. Which would cause a massive fuss.
It would appear that some decisions are quicker than others. Not sure why; I can only guess.Apart from the above arguments why does it take so long to come up with a decision when we are involved.
Clearly you know a lot about this, but surely things like calculating positions by combining multiple cameras is one way? It also seems to be an obvious application for AI.I'm not sure technology is going to improve.
With higher frame rates you either need to increase the exposure proportionally, or increase the sensitivity of the camera's sensor.
Increasing the exposure, either by lowering the shutter speed, or widening the aperture comes with its own problems (motion blur/shallow depth of field). In increasing the sensitivity of the image sensor you introduce noise into the image and it becomes increasingly grainy.
Alternatively you could increase the brightness of the floodlights, but if you increase the frame rate to 100fps (a 9cm margin of error at 20mph) you would have to effectively double the brightness of the floodlights, and nobody wants to have their retinas burned out playing football.
Because you care about them, so you have different things going on in your head, which probably makes the wait feel longer.Apart from the above arguments why does it take so long to come up with a decision when we are involved.
I thought this season we could hear the conversations between the ref and VAR like in cricket and rugby after the game had finished.
Or am I imagining that?
What is the PL's definition of when a pass is made? Is it when the foot first 'appears' to contact the ball, or is it when the ball 'appears' to leave the foot?Clearly you know a lot about this, but surely things like calculating positions by combining multiple cameras is one way? It also seems to be an obvious application for AI.
Apart from the above arguments why does it take so long to come up with a decision when we are involved.