Inventors:
Peter Staats - Wenham MA, US
Rob Sumner - Cambridge MA, US
Daniel Ryan - North Andover MA, US
Assignee:
ByteLight, Inc. - Boston MA
International Classification:
H04N 7/18, G06K 9/36
Abstract:
In one aspect, the present disclosure relates to a method for isolating a broadcast digital pulse recognition tone of a beacon light source in a digital video sequence. In some embodiments, the method includes receiving a digital video sequence of a scene, the digital video sequence including a sequence of frames and the scene including both modulated illumination broadcast by a beacon light source and un-modulated illumination, calculating a background value of the digital video sequence, the background value including a portion of the digital video sequence corresponding to the un-modulated illumination of the scene, subtracting the background value of the digital video sequence to obtain an isolated digital video sequence of the modulated illumination of the scene, calculating a frequency content of a frame of the isolated digital video sequence, and determining a particular tone broadcast by the beacon light source based on the frequency content.