Patent ID: 9379814
Filing Date: 2016-06-28
CPC Classification: H04B,H04N,H05B

Claim Text:
1. A light detection system comprising: a rolling shutter camera for acquiring at least one image of a scene being illuminated by an illumination system comprising at least a first light source providing a light contribution comprising a first embedded code emitted as a temporal sequence of modulations in a characteristics of a light emitted, wherein said at least one image comprises a matrix of pixels, each pixel representing an intensity of a total light output of said illumination system at a different physical position within the scene, and wherein said at least one image is acquired as a plurality of temporal shifted line instances, each comprising an instance of said temporal sequence of modulations of the first embedded code; and a processing unit for determining said first embedded code from a spatial pattern of modulations, wherein said processing unit is configured for determining the first embedded code based on a combination of pixel values along each line instance, wherein said combination of pixel values along line instances is constrained to at least one predetermined subarea of said acquired at least one image, wherein a selection of said predetermined subarea is performed by convolving said at least one image with a filter having a filter kernel, which filter kernel is arranged to match an expected spatial pattern of modulations associated with said first embedded code.