Electronic Line Judge (Tennis) (Paperback)

High Quality Content by WIKIPEDIA articles! Attempts to revolutionize tennis officiating and the judging of calls in the sport began in the early 1970s and has resulted in the design, development and prototyping of several computerized, electronic line-judge devices. The methods have been based upon the use of pressure sensors, sensors to detect magnetized and/or electrically conductive tennis balls, infrared laser beams, and most recently video cameras.