MOBILE DEVICE BALL SPEED TRACKING

摘要

A process for determining the speed of a moving sport ball using a mobile device having a camera, the process comprising: providing instructions to a user on how to position the mobile device relative to a sport court of a known layout and in relation to which the sport ball is expected to move; providing feedback to the user about the position of the mobile device; determining the position of the mobile device relative to the sport court; video shooting of the moving sport ball using the camera of the mobile device; analyzing the video of the moving sport ball and extracting from the video the data necessary for computing the speed of the moving sport ball; computing the speed of the moving sport ball; and, displaying the computed speed on the screen of the mobile device.

主权项

1. A process for determining the speed of a moving sport ball using a mobile device having a camera, the process comprising: providing instructions to a user on how to position the mobile device relative to a sport court of a known layout and in relation to which the sport ball is expected to move; providing feedback to the user about the position of the mobile device; determining the position of the mobile device relative to the sport court; video shooting of the moving sport ball using the camera of the mobile device; analyzing the video of the moving sport ball and extracting from the video the data necessary for computing the speed of the moving sport ball, wherein said data comprises the positions of the moving sport ball in a plurality of frames of the video relative to a plurality of predetermined reference points located on the sport court, wherein the actual distance between the predetermined reference points on the sport court is known; computing the speed of the moving sport ball; and, displaying the computed speed on the screen of the mobile device.