Hawk eye technology

Category: Sports

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Total description of hawk eye technology


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Poornima College of Engineering Department of Electronics & Communication Engineering Guided by:- Ms. Shikha Shrivastava Lecturer (ECE dept.) Shashank Garg (EC/08/101) Presentation by:- “HAWK EYE”

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Introduction History Abilities How It Works Visual representation Principle/Technology Generation of Image Processing Accuracy Applications Further Developments References Conclusion CONTENTS


Introduction Hawk-Eye is a computer system used in cricket, tennis, snookers and other sports to visually track the path of the ball and display a record of its most statistically likely path as a moving image Hawk-Eye as the most innovative technology provider in sports broadcasting and is a development that will reinforce the group's presence and influence.


It is primarily used by the majority of television networks to track the trajectory of balls in flight. It was developed by engineers at Roke Manor Research Limited of UK in 2001 A patent was submitted by Dr Paul Hawkins and David Sherry.


It was developed by engineers at Roke Manor Research Limited in 2001; the patent being held by Paul Hawkins and David Sherry. Later, the technology was spun off into a separate company, Hawk-Eye Innovations Ltd., as a joint venture with television production company Sunset + Vine . It first hit our screens in 2001 and has been helping to unravel the mysteries of the lbw decision ever since. History


Hawk-eye can track any type of bounce, spin, swing and seam movement of the ball. Give a prediction as accurate as 99.99 percent Hawk-Eye was used for referring decisions to the third umpire in LBW. Abilities

How does it work?:

This is essentially visual processing, using cameras, not lasers. There are six calibrated cameras stationed at strategic points around the ground. As a ball is bowled each camera recognises the ball in the image. A 3D trajectory of the ball is created from the image data using a process called Kalman Filtering. From this 3D trajectory, you can determine the speed, angle and deviation of the ball's flight. How does it work?



Principle of Hawk-Eye:

A Hawk-Eye system is based on the principle of ”Triangulation” Triangulation is the process of determining the location of a point by measuring angles to it from known points at either end of a fixed baseline Principle of Hawk-Eye


Technology Hawk-Eye takes 2 inputs Video provided by 6 different cameras placed at 6 different places. The speed of the ball. The system rapidly processes the video feeds by a high speed video processor.


Hawk Eye incorporates both image analysis and radar technology. The six fixed JAI monochrome cameras, with a 120 MHz frame rate, are placed around the playing field They track the ball’s entire trajectory, right from the point where it is released from the bowler’s hand to the point the ball is considered dead. Contd …

Generation of Image:

(a) identify each frame from each camera, and groups the corresponding pixels to the image of the ball (b) compute for each frame the 3D position of an image thus identified using ball image data from at least two different cameras (c) predict a ball flight-path from the said 3D ball position as computed in successive frames ( d) map the predicted path on the modeled area so as to identify any interaction with one or more of the said characteristic features Generation of Image


The cameras are used in two sets, and a multi-channel frame grabber handles each set of cameras. The images captured are then processed by software to produce a 3-D image. This is updated 100 times every second. The system is able to locate the ball in 3-D and can predict the motion with a claimed accuracy of 5 mm Processing

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The system generates a graphic image of the ball path and playing area by using which umpires take decisions. The same can be provided to the television viewers and coaching staff.


During testing in 2006 Hawk-Eye made the correct call in 100% of all tests, showing an average error of only 3.6mm. Tests have always been conducted outdoors, encompassing situations that take the following factors into consideration: Wind (and therefore camera wobble); Bright sunlight at different times of the day; Shadows covering part or the majority of the court; Dark or overcast conditions; Artifical floodlights. ACCURACY OF THE TECHNOLOGY


Indoor venues are obviously easier in which to track because conditions are far less variable. Quite simply, Hawk-Eye can track accurately and reliable in any conditions, on any surface. Although the accuracy of the existing system has been tried and tested, the company is constantly trying to develop and refine the system. Hawk-Eye listens to feedback from customers and officials to ensure that Hawk-Eye remains the very best in the market. Contd …


Its applications are mainly in sports Cricket Tennis Snookers and In some games Applications


Used in the third umpire decision(Referral system) At the end of an over, all six deliveries are shown simultaneously to show a bowler's variations such as bounce, speed variations and ball deviation. To view the deviation of the ball from actual track. Cricket


Hawk-Eye was first used in tennis in the year 2004(US open tennis). In tennis Hawk-Eye generates the impact of the ball whether the ball is “IN” or “OUT” Tennis


This technology is useful in cases where the cue ball touches the specified ball first or any other ball. Some games such as “Brian Lara Cricket 2005”also support this technology. Snookers Games


1. Hawk-Eye is already working on implementing a system for basketball. 2. The Football Association has declared the system as "ready for inspection by FIFA", after tests suggested that the results of a goal-line incident could be relayed to the match referee within half-a-second (IFAB, the governing body for the Laws of the game, insists on goals being signalled immediately e.g. within five seconds). FURTHER DEVELOPMENTS


http:// v3.espacenet.com/textdoc http :// www.usopen.org/en_US/news/articles/2006-08-10/ http :// www.nzherald.co.nz/section/4/story.cfm?c_id=4 http :// archive.gulfnews.com/indepth/dubaitennis2007/08379 http://www.wikipedia.org/wiki/hawkeye http://www.hawkeyetechnology.com/tech/ References


After all the test that have been conducted on this technology , it has always come out successful and it promises to be a boon for the world of sports and now it is up to the different councils to decide whether to use this technology or not . This technology has met the high reality and accuracy features. Hawk-Eye is currently developing a system for Football This technology helps to have correct decisions in any kind of game. Conclusion

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