Light detection system and method

A light detection system comprising:

• a rolling shutter camera configured to acquire a plurality of images 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 characteristics of emitted light, wherein the embedded code is repeated periodically, and wherein each of said plurality of images 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 respective ones of said images are acquired as a plurality of temporally shifted line instances, each comprising a line of said matrix pixels sampling a different instance of said temporal sequence of modulations of the first embedded code, the lines being exposed temporally line-by-line at different time instances with a time delay between adjacent lines so as to give rise to a spatial pattern of modulations corresponding to the temporal sequence of modulations;
• and
• a processing unit arranged to determine said first embedded code from the spatial pattern of modulations from the plurality of images by determining bits of the first embedded code from the respective ones of the plurality of images until each bit of the first embedded code has been determined.