The addition of computer based analysis tools has greatly simplified and made efficient the process of timing races, as well as automated some portions of timing labor such with features such as motion detection and bookmarking of finish times. Many modern systems, such as those manufactured by FlashTiming, are capable of frame rates of 120 frames per second at higher spatial resolution and in a purely digital regime. Previously, the NTSC television standard limited most VHS and SVHS, and digital frame rates to 59.94 frames per second (limiting the timing resolution to. This has followed from the advent of low-cost machine vision technologies which has made possible systems that surpass 1/100 second time resolution. Recently, there have been significant advances in full-frame video timing which utilizes a full sensor array rather than a single line. A flashing LED embedded the time calibration to the film. Computer software then arranges these frames horizontally to form a panoramic image which effectively displays a graph of the finish line (and anything crossing it) as time passes, with time denoted on the horizontal axis.īefore the advent of digital photography (and still available as an alternative), a similar film-based system was used, consisting of a slit which a strip of film is advanced past at a constant rate to produce a similar panoramic image to the digital system. During a race, the camera takes images at an extremely high frame rate (the exact rate depends on the system, but can be in the thousands of lines per second). These cameras have an image field only a few pixels wide, with a single frame forming a narrow image only of the finish line, and anything which is crossing it. TimeTronics, FinishLynx, and Omega are examples of commercial timing systems commonly used in athletic competitions. The current photo-finish system used in Olympic competition, as well as other top-level events uses a digital line-scan camera aimed straight along the finish line.
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