Method of measuring a property of a trajectory of a ball with a mobile computer device
First Claim
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.
1 Assignment
0 Petitions
Accused Products
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.
5 Citations
19 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. Mobile computer device, comprising:
-
a camera that is configured for recording a sequence of video frames of a ball; a processor coupled to the camera and configured to; determine a first picture coordinate of the ball in a first video frame of the sequence; determine a second picture coordinate of the ball in a second video frame of the sequence; and compute 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. - View Dependent Claims (9, 10, 11, 12)
-
-
13. A computer-program product, tangibly embodied in a non-transitory machine-readable storage medium, including instructions configured to cause a data processing apparatus to:
-
capture a sequence of video frames of the ball with a camera of a mobile computer device; determine a first picture coordinate of the ball in a first video frame of the sequence; determine a second picture coordinate of the ball in a second video frame of the sequence; and compute 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. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification