Originally Posted by The Meat
Attach Iphone on net, capture the serve with the video capture and try to get the frames per second off of it. Create a program that converts that to seconds and then find a way to input a specific distance from one end to the other. Then the simple V=d/t formula. I would like 40% of your profit when your finished.
Sten Kaiser,AKA stoneage, developer of RacquetTune, has an iOS app, SpeedClock, that measures object speed using the iPhone/iPod camera. He includes instructions for measuring serve speed. Here's a link http://appmaker.se/?m=5&s=1