① Hawkeye system
The official name of Hawkeye is "instant playback system", which is a computer system used in tennis and other sports. It is used to track and record the path of the ball, display the graphic image of the recorded actual path, and predict the future path of the ball. In tennis, the Hawkeye system has become a part of the referee procedure. The Hawkeye system was developed on 200 1 by engineers from Roke Manor Research Limited in Ramsey, Hampshire, England. The patent is held by Paul Hawkins and Dr. David Shelley.
The system connects several high-speed cameras distributed around the stadium with the computer system. Firstly, with the help of computer, the three-dimensional space of the stadium is divided into measurement units in millimeters, and then the spheres are photographed from different angles at the same time with high-speed cameras.
The basic data of flight trajectory, and then these data are generated by computer into three-dimensional images, and finally the flight route and landing point of the sphere are presented on the big screen.
If the player thinks that the ball is in or out of bounds during the game, he can immediately apply for the use of "Hawkeye" technology for ruling. Once a player makes such an application, the playback lens provided by Hawkeye will appear on the live TV screen and the live TV display screen at the same time, so that the player, the referee, the live audience and the TV audience watching the live broadcast can see whether the ball landed in or out of bounds.
② Tennis and Hawkeye
In August 2006, the US Open took the lead in opening Hawkeye in Grand Slam events, followed by the Australian Open. Only in June did the "Hawkeye" not be used on the red clay of the French Open, and it will not be used in the future, because the ball landed on the soft red clay, leaving a clear trace.
For professional tennis players, it is a significant innovation to introduce eagle-eye technology into tennis spot penalty, which is comparable to the introduction of tiebreak system 36 years ago. American star Corell, a four-time Grand Slam winner who specializes in auditing the use of this technology, said: "This is a huge progress for a sport that rarely changes its tradition."
Hawkeye usage rules:
1. The use of Hawkeye depends on the arrangement of the competition organizing committee. The organizing Committee has the right to install and use Hawkeye, and also has the right not to use it;
2. The Organizing Committee publicized the use of Hawkeye to assist the referee before the competition;
From April 3, 2008, each player will have three chances to challenge Hawkeye in each competition, and if he enters the tiebreak, he can increase it once. Before April 2008, it was twice per set, and if you enter the tiebreaker, you can add one.
4. The rules for athletes to use Hawkeye-assisted free throws are:
Stop hitting the ball when the ball is broadcast live, and you can ask to use the eagle eye. If you punish your opponent's mistakes, you will win this point. Otherwise lose points; After the referee finishes the penalty, if he is dissatisfied with the penalty, he can ask to use the eagle eye. If the referee makes a mistake, he will win the point, otherwise the original judgment will be upheld.