Patent ID: 8620163

Claim:
A method for receiving a modulated signal transmitted from at least one signal emitter, the method comprising: receiving at least one image that comprises image data representing the modulated signal received as radiation emitted from the at least one signal emitter, wherein the radiation represented in the image data comprises at least one period of the modulated signal and wherein the at least one image was captured by a camera of a computing device while a field of view of the camera was moving relative to the at least one signal emitter, and wherein an exposure time of the camera to capture the at least one image is equal to or greater than the at least one period of the modulated signal; analyzing, by at least one processor, the at least one image; extracting, based on the analyzing, the image data representing the radiation; and determining, from the image data that was extracted, the modulated signal transmitted by the at least one signal emitter.