Hawk-Eye is a ball tracking system that uses multiple cameras to capture images of a ball in motion and uses computer processing to reconstruct the 3D path of the ball to determine if it was in or out of play. It was developed initially for cricket but is now also used in tennis to verify line calls. Hawk-Eye analyzes frames from 4 or more cameras to calculate the position of the ball in each frame and then maps the ball's path to determine if it was in bounds according to the rules of the game being played.

3. Hawk Eye

4.  It is a system that tracks the ball as it
moves around the court (or football
pitch) and determines whether a ball
is in or out, and where it might've
gone if not it wasn't caught or hit
(especially important in leg-before-
wicket decisions in cricket.

5.  Or to put it in simpler terms it is a….
Ball Tracking System

6. i
Hawk-Eye was invented by Paul Hawkns
and David Sherry at Roke Manor Research
in the UK, with the initial main aim of
being used in cricket.

7. How it Works?

9.  Hawk-Eye requires a minimum of 4 cameras
around the playing field (cricket uses 6, see
illustration in the previous slide). The cameras
are normal video cameras and thus take a
series of shots of what they see, called frames.

10.  Each frame is sent to a data processing unit (a
computer) where the computer has to firstly
identify the ball and calculate its position in the
frame. Once the computer has done this for all
4 cameras, it calculates a 3D position of the ball
in space using all the data gathered from all the
cameras.

12.  After this, the computer can draw the path that
the ball has taken, as well as predict a path that
the ball might take, based on the change of
position of the ball in successive frames. The
computer can then map this path and compare
it to the rules of the game to determine whether
a ball was in or out, or a player was LBW

17.  The computer can also work as a statistics
generator, recording and storing information
about ball track, size, and velocity.

18. It works in a similar fashion in tennis as well…

19.  Presently the Hawkeye is being used in the
UDRS in cricket and to verify line calls in
tennis.
 Thus the Hawkeye is a useful technology to
make sports like cricket and tennis free from
human errors , ensuring fair play in the playing
field.