|Photos||Video & Audio||Blogs||Statistics||Archive||Shop||Mobile|
Among the recent innovations in use in cricket broadcasting is a system that claims 100% accuracy in catching the thinnest of edges
August 4, 2008
What is HotSpot?
HotSpot is a television innovation - first seen during Channel Nine's coverage of the 2006-07 Ashes - that uses infrared camera technology to determine whether a batsman has made contact with a delivery, and if so, which part of his bat or body made contact.
How does it work?
Two powerful thermal-imaging cameras are positioned above the field of play, behind the bowler's arm at either end of a ground. These can remotely sense and measure the minute amount of heat generated by the impact of a cricket ball against another object. Computer technology then generates a negative image on which the point of contact is highlighted as a red friction "hot spot" for a second or two. HotSpot doesn't only record impacts between the ball and other objects, but also the bat hitting a pad or the ground.
If there are two simultaneous hot spots - ball on pad and bat brushing pad - close together, how do you differentiate?
Two hot spots would appear, one fractionally before the other, according to the sequence of the events. HotSpot is therefore useful in instances of bat-pad impacts in determining whether the ball hit bat or pad first.
What technology does the application use?
HotSpot uses technology developed in the military for tank- and jet-fighter tracking. The technology was adapted for television by BBG Sports, the Australian company responsible for the Snickometer, in conjunction with Sky Sports. Channel Nine producer Steve Crawley described HotSpot as "100% backed up by science", as opposed to other applications.
Has it been used in any other sport?
HotSpot has only been used in cricket - though its services are not available to umpires under the current referral system - but work is underway to adapt the technology for use in tennis.
© ESPN Sports Media Ltd.
Gavin Larsen talks about wobbly seam-up, the 1992 World Cup, and his role in the next tournament
Ask Steven: Also, high scores and low averages in ODIs, most ducks in international cricket, and the 12-year-old Test player
Dickie Bird on what happened when he declined a request for a change of ball once
Modern Masters: Rahul Dravid and Sanjay Manjrekar discuss VVS Laxman's match-winning skills
Jonathan Wilson: Runs and wickets matter little in games involving authors, seminarians and the like. It pays to keep your ears open
Also, the closest ODI team match-ups, most catches in a T20, and expensive Test debut five-fors
As West Indies play their 500th Test, here's an interactive journey through their Test history
Hundred in a session? Easy peasy for Doug Walters