Method and system for video processing to determine digital pulse recognition tones
US8520065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2012 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Jun 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/485
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.