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Replacing Sports Referees With Technology?
dividedsky319 asks: "There have been numerous instances in which fans of a sporting team blame the loss of a game on the refs. Yet, nowadays, technology could replace a lot of what referees do. A sensor in a baseball could determine a ball or a strike. Same with a tennis match, the ball is either in or out. A sensor in a football could determine whether the ball moved forward 10 yards for a first down. Why hasn't this happened, yet? Obviously not all calls can be determined by technology, but it is feasible for certain instances. What would be the ramifications if something like this WAS introduced, and why has it taken so long?"
Baseball tried something similar. They decided a few years ago that they'd use a computer system (Questec) to "grade" umpires' strike zone accuracy, and then tie the grading to personnel decisions.
, 00.html, and an inside view from an operator at http://www.baseballprospectus.com/article.php?arti cleid=3326 (not sure if this is a premium article, if you can't get to it sorry)
The system works by lining up tracking devices/cameras around a predetermined zone. Big problem. The strike zone is defined "from the bottom of the batter's knees to the midpoint between his shoulders and belt as he stands in a habitual crouch." This varies from batter to batter, it varies by the batter's stance; it can't be predetermined. Even instantaneously, it's a judgement call when a 90+ mph pitch is passing by. Then there's the matter that the strike zone is meant to be called as the ball goes over the plate. The strike zone isn't a plane at the front of the plate like many casual fans think. It's a solid volume floating above the pentagonal home plate. When pitchers are throwing good curveballs and sliders, that's very tough to get right, even for a machine.
When the system first came out, it was only in a handful of parks (7? out of 30). Umpires immediately tried to adapt to the system, trying to predict what their zone needed to be to agree with often-flawed calibrations. Games in those parks were way out of the norm for awhile. Players threw tantrums (and Curt Schilling actually broke a machine) protesting the system. Now the system is in many more parks (~23) and the system is no longer in the spotlight. I believe the umps actually negotiated on what the system could and couldn't be used for (ie, personnel decisions) in their last labor agreement.
There's an editorial from the original roll-out at http://www.wired.com/news/technology/0,1282,59284