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1. (WO2013144029) METHOD FOR REPRESENTING A PARTICIPATING MEDIA IN A SCENE AND CORRESPONDING DEVICE

Pub. No.:    WO/2013/144029    International Application No.:    PCT/EP2013/056130
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Sat Mar 23 00:59:59 CET 2013
IPC: G06T 15/06
G06T 15/50
Applicants: THOMSON LICENSING
Inventors: GAUTRON, Pascal
MARVIE, Jean-Eudes
DELALANDRE, Cyril
Title: METHOD FOR REPRESENTING A PARTICIPATING MEDIA IN A SCENE AND CORRESPONDING DEVICE
Abstract:
The invention relates to a method for rendering a participating media (10) delimited by a bounding box (30) and rendered from a viewpoint (14), the media (10) being at a determined distance from the viewpoint according to a viewing direction. In order to represent the limits of the participating media, the method comprises steps of: - for at least one point (300) of the volume formed by said bounding box (30), estimation of a set of directions (31 to 3i) having for origin said at least one point (300): - for each direction (31 to 3i), estimation of a first intersection point (31m), corresponding to the intersection between said direction and said participating media (10), for which the associated density value is greater than a first threshold value, and - estimation of third intersection points, corresponding to the intersections between said viewing direction and said participating media, from an item of information representative of distances separating the first intersection point (31m) from a second intersection point (310) corresponding to the intersection between the direction and the bounding box (30) for each direction of the at least one part of the set of estimated directions (31 to 3i). The invention also relates to a corresponding device.