Patent ID: 9694238
Date: 2017-07-04
CPC Classifications: A63B,G06K

Claim:
1. A device for analyzing trajectories of tennis balls, the device comprising: one or more cameras for recording video frame data used to characterize a trajectory of a tennis ball generated by a player during a tennis related activity; a logic device designed or configured to i) receive the video frame data, ii) identify the tennis ball in the video frame data, iii) determine when a tennis racquet strikes the tennis ball, iv) generate trajectory parameters that characterize one or more states of the tennis ball along its trajectory based on the identified tennis ball in the video frame data, including at least one trajectory parameter measured by the logic device that characterizes a state of the tennis ball when the tennis racquet is determined by the logic device to strike the tennis ball, and v) generate feedback information using the trajectory parameters, wherein the feedback information indicates the at least one trajectory parameter, wherein the logic device is designed or configured to identify a net associated with a tennis court including an upper edge of said net in the video frame data, wherein the logic device is further designed or configured to measure a height of the tennis ball relative to the upper edge of said net when the tennis ball is above the net during a shot of the tennis ball, and wherein the feedback information indicates the measured height of the tennis ball; and at least one output mechanism for providing the feedback information.