The software also takes note of the time between frames to give a movement versus time data set. Using video motion analysis software, the image on screen can be calibrated to the size of the scale enabling measurement of real world values. The moving object of interest is filmed doing a motion with a scale in clear view on the camera. A digital video camera is mounted on a tripod. Police use software, such as Kinesensewhich performs video motion analysis to search for key events in video and find suspects. Police and forensic scientists analyse CCTV video when investigating criminal activity. The repetitive and patterned nature of sports games lends itself to video analysis in that over a period of time real patterns, trends or habits can be discerned. In sport, systems have been developed to provide a high level of task, performance and physiological data to coaches, teams and players. Recently, computer technology has allowed other applications of video motion analysis to surface including things like teaching fundamental laws of physics to school students, or general educational projects in sport and science.
Traditionally, video motion analysis has been used in scientific circles for calculation of speeds of projectiles, or in sport for improving play of athletes. The motion analysis technique usually involves a high-speed camera and a computer that has software allowing frame-by-frame playback of the video. Examples of this include gait analysis sport replaysspeed and acceleration calculations and, in the case of team or individual sports, task performance analysis. Video motion analysis is a technique used to get information about moving objects from video.