Patent ID: 8755561

Claim:
A detection system for determining whether a light contribution of a first light source of an illumination system is present at a selected position within a scene; wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the detection system comprising: a camera configured to acquire a series of images of the scene, wherein: each acquired image includes a plurality of pixels, each pixel representing an intensity of a total light output of the illumination system at a different physical position within the scene and the total light output of the illumination system comprising at least the light contribution of the first light source, the series comprises at least N different images, and each image of the at least N different images is acquired with a total exposure time comprising one or more exposure instances at different temporal positions within the repeating first sequence of N symbols; and a processing unit configured to process the acquired series of images to determine that the light contribution of the first light source is present at the selected physical position.