Hot Spot technology is an infra red imaging system. This technology sometimes uses in cricket for adjudication. When properly used, these can reduce the room for error with LBW or out-caught/caught-behind decisions and can accurately determine whether the ball had made contact with the batsman's bat, pad, glove or any other part of the body. The expense of setting up the two-camera solution at each match is very high (a thermographic camera goes for roughly $30,000).
The mechanism of hot spot is that it uses 2 infra red cameras which are placed at either end of the ground.These infra red cameras sense and measure heat generated by a collision,for instance ball on pad,ball on bat,ball on ground or glove.Using a subtraction technique a series of black and white negative frames are generated into a computer,perfectly localising the ball’s point of contact.
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