It can also be extended so that it supports other sports (e.g., shot put, hammer throw and javelin). MobiXeyes can be used in official Beach Racket tournaments or in informal matches. Automatic export of specific tournament statistics.Synthetic sportscasting (provided by e-rhetor ).Visualization of score and statistics in (LED) displays.Dark-colored wall (non-glistening dark material with dimensions 1,80m x 4,5m).Peripherals (speakers, display, printer, push buttons).One laptop running the machine vision software.Specifically, the final score of a ball hit contributes is computed as follows: A team’s score is analogous to the speed of the ball hits and is calculated given a base speed. By knowing two positions of the ball one can calculate the ball velocity vector. Stereo vision algorithms calculate the exact position of the ball in the 3D space. The cameras operate in a pseudo-synchronized mode. They are placed opposite to a dark wall that operates as a background facilitating the object (ball) detection process. The two cameras capture frames at a high rate (at least 130FPS). The solution allows the players to move freely in the court by measuring with high accuracy ball speed regardless the direction of the velocity vector (a problem of the Doppler radar solutions). The system design tries to satisfy several diverse requirements, such as portability, low cost, accuracy and robustness (error-tolerant). mobiXeyes was initially developed for measuring ball speeds and tracking the score in open-air Beach Racket games, however the capabilities have expanded to applications including security and surveillance systems, sports training and scoring systems, intelligent transport systems and mobile robotics. MobiXeyes is a stereo vision system capable of accurately extracting 3D information from camera frames.
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