Light detection system and method

摘要

There is provided a method for detecting modulated light comprising: receiving a set of images acquired by means of a rolling shutter camera having image acquisition settings comprising a frame rate, fframe, and a line rate, fline; identifying in consecutive frames of said images—a pattern governed by the ratio between a modulation frequency, fc, of a modulated light source and the line rate, fline, and—between consecutive frames a spatial shift of said pattern governed by the ratio between said modulation frequency fc, and said frame rate, fframe; and providing based on said pattern and spatial shift thereof, an estimate of the modulated light amplitude from said light source.

主权项

1. A method for detecting modulated light comprising:
receiving a set of images of a scene being illuminated by a modulated light source, said set of images acquired by means of a rolling shutter camera having image acquisition settings comprising a frame rate, fframe, and a line rate, fline; identifying, via a processing unit in a light detection system, in consecutive frames of said set of images acquired from said rolling shutter camera
a pattern governed by the ratio between a modulation frequency, fc, of a modulated light source and the line rate, fline, andbetween consecutive frames a spatial shift of said pattern governed by the ratio between said modulation frequency fc, and said frame rate, fframe; and providing, via said processing unit in said light detection system, based on said pattern and spatial shift thereof, an estimate of the modulated light amplitude from said light modulated source.