(Lawn) Tennis, normally the same of tennis game, it usually be using for "rubber ball". At the beginning, Japan made the (Lawn) Tennis game. Because, Tennis ball, rocket is very expensive at that time. < High Speed Camera catch Ball and line image > This picture is very useful to judge on the line. High Speed camera checked In/Out about ball on field. < shooting and Equipment Appearance > This video appear with In/Out exactly. Normally, Eyes of Human limited to check ball speed. Speed of Tennis ball is about 200 km/s, it mean when someone have to judgement and check exactly, Camera's Frame count and Frame Rate are very important point. < Compare with 30fps and 180fps ...