![]() ![]() The International Tennis Federation demands that any electronic system must never be in error by more than 10 millimetres, and that the average error must be below 5 millimetres. It is claimed that Hawk-eye is accurate well within these tolerances. But any such filming and reconstruction will always contain some approximation and some error. Hawk-Eye takes video footage from up to ten high-speed cameras and uses the footage to reconstruct the trajectory of the ball. Hawk-Eye will occasionally get it wrong, of course, notwithstanding some confusing hype on the official website. How do we know Hawk-Eye is infallible? Because the tennis commentators constantly act as if Hawk-Eye is infallible. Which is why the infallible computer system known as Hawk-Eye was introduced. ![]() Of course, balls are much more commonly miscalled simply as a result of human error. ![]()
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