Method of measuring a property of a trajectory of a ball with a mobile computer device
US9516276B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Feb 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30224
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods for determining a property of a trajectory of a ball with a mobile computer device are described, which include: (a) capturing a sequence of video frames of the ball with a camera of the mobile computer device; (b) determining a first picture coordinate of the ball in a first video frame of the sequence; (c) determining a second picture coordinate of the ball in a second video frame of the sequence; and (d) computing a property of the trajectory of the ball based on a difference of the first and second picture coordinates, a time difference between the first and second video picture and a reference quantity, which may be determined based on a form and/or dimension of the ball in a picture taken with the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.