Method for collecting image data for producing immersive video and method for viewing a space on the basis of the image data

A method for collecting image data destined for producing an immersive video, which method comprises a setting up of a first set of at least n (n>1) scanners, each being provided for producing scanning beams, which method also comprises the scanning of a predetermined space by each of the scanners of said first set of scanners by means of scanning beams for producing the image data of said space, which image data are stored in a memory, characterized in that a zone of viewpoints is determined by delimiting a volume from which a user of the immersive video will be able to see said space and to perform with his head a movement, in particular a translation movement, inside the zone of viewpoints, a second set of m (m>1) source points located at the ends of the zone of viewpoints being thereafter determined, which setting up of said first set of at least n scanners being realized by placing at each of said source points each time one of said scanners of said first set, said scanning of said space being realized by means of said scanners placed at said source points and by scanning step by step said space according to a succession of at the one hand azimuth angles and on the other hand elevation angles each located in a range predetermined by said zone of viewpoints, which production of image data is realized by collecting for each produced scanning beam the scanning beam reflected by each time a touched point situated within said space and touched by the concerned scanning beam and by determining by each step and on the basis of the reflected scanning beam a distance (d) between the touched point and the scanner having produced the concerned scanning beam as well as a color parameter of said touched point, said data being stored in the memory in the form of a matrix structured according to the azimuth and elevation angles.