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Method of measuring a property of a trajectory of a ball with a mobile computer device

  • US 9,516,276 B2
  • Filed: 03/12/2014
  • Issued: 12/06/2016
  • Est. Priority Date: 04/03/2013
  • Status: Active Grant
First Claim
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1. A method for determining a property of a trajectory of a ball with a mobile computer device, comprising:

  • capturing a sequence of video frames of the ball with a camera of the mobile computer device;

    determining a first picture coordinate of the ball in a first video frame of the sequence;

    determining a second picture coordinate of the ball in a second video frame of the sequence; and

    computing a property of the trajectory of the ball using the first and second picture coordinates, a time difference between the first and second video picture and a reference quantity, wherein the property of the trajectory of the ball is computed using a least squares method.

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