Patent ID: 8330611

Claim:
A method of positionally identifying swimmers swimming within a swimming pool, the method comprising: associating an identification generated for each swimmer with a head device to be worn while the swimmer swims within the swimming pool; controlling a beacon included within each head device to emit a signal at an interval specified within a beacon transmission schedule; controlling a camera to record images representative of at least a portion of the swimming pool, each image plotting recorded signals within a two-dimensional field defined by a viewing angle of the camera; calculating image-based positional coordinates for each signal appearing within each of the captured images, the image-based positional coordinates defining spatial positioning of the beacons emitting the signals relative to the two-dimensional field of each image; reducing the image-based positional coordinates to pool-based positional coordinates, the pool-based positional coordinates defining spatial positioning of the beacons emitting the signals within at least a two-dimensional coordinate system defined relative to at least a length and width of the swimming pool; and for each of the images, identifying the swimmer at each of the pool-based positional coordinates based on the identification of the swimmer scheduled to emit signals at the time the image was captured.