For those not familiar with international cricket’s Umpire Decision Review System (DRS), it is the process by which certain matters are decided on the field, not just by the umpires, but by a series of advanced technologies observing the game: watching, analysing, and even listening to it. Haddin was initially given not out when he appeared to be caught behind, presumably because the umpire didn’t believe he had hit the ball. But after England appealed the decision, the decision was referred to the third umpire, and DRS. A slow-motion infra-red camera known as Hot Spot, trained on the batsman from the far side of the field, showed a momentary but incontrovertibly bright dot of friction heat on Haddin’s bat as he just nicked the ball into the England wicket-keeper’s hands. Another system, not officially part of DRS but widely used by broadcasters, confirmed the decision. The Snickometer, a combination of slow-motion camera and high-quality microphone, detected an almost imperceptible but audible “snick” as the ball struck the bat’s edge. The game was England’s.
Hot Spot’s technology was adapted by an Australian broadcasting company for sporting use, but is based on pioneering military work by French scientist Nicholas Bion for tank and jet fighter tracking. The twin SLX-Hawk thermal imaging cameras at Trent Bridge were built by a British engineering company, Selex ES, which also designs laser rangefinders, radars and other sensors for planes, warships and satellites. The Snickometer was invented in the mid-90s by British Computer Scientist Alan Plaskett, who has also worked on Hot Spot. The final piece of DRS, and the best known one due to its use in Tennis and other sports, is Hawk-Eye, another product of British engineering – Roke Manor Research, based in Romsey, which also produces signal intercept systems and altimeters for drone aircraft.
Hawk-Eye uses a network of high-performance cameras to track a ball in motion, combining the footage from each one in order to create a three-dimensional representation of the ball’s trajectory. In tennis, this yields the footprints which decide whether a line call is given in or out in contested calls, and in cricket it is used to predict whether a ball deflecting by the batsman’s pad would have hit the wicket, or not. But of course, this is only a prediction, more accurate than a human eye and capable of greater accuracy than human judges, but not, in any strict sense, infallible. The complexity of the calculations used to determe Hawk-Eye’s accuracy rival those of the more famous, and equally misunderstood, Duckworth-Lewis method. (...)
And this is where sports technology begins to illuminate larger issues around human and technological agency. An unlikely champion of humanity has emerged in the person of Sepp Blatter, President of FIFA. Soccer players and fans have long called for the introduction of goal-line technology, which would be able to tell more accurately than referees if a ball had indeed crossed the line. A number of different approaches, one based on Hawk-Eye, another using chips implanted in footballs, are currently under trial. However, Blatter has long opposed these, based partly on their accuracy, but also going on the record to say that “Other sports regularly change the laws of the game to react to the new technology. … We don’t do it and this makes the fascination and the popularity of football”. What underlies this statement is a fundamental belief that sport is a human undertaking, with all the confusion, fallibility and debate that that involves. One reading is that officials are themselves part of the game, a fact of endless frustration to almost everyone involved; another that sport is inherently chance-based, and while we resist optimising participants through drugs and physical augmentations, the laws and outcomes of sport should remain human too.
by James Bridle, booktwo.org | Read more:
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