The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2017
Filed:
Mar. 28, 2013
Thomson Licensing, Issy de Moulineaux, FR;
THOMSON LICENSING, Issy de Moulineaux, FR;
Abstract
A method and device for estimating the opacity at a point of a scene lit by an area light source and comprising an object defined by a mesh and occluding some of the emitted light. In order to optimize the calculations for live estimation of the opacity, the method comprises sampling said area light source in a plurality of samples, for at least one sample of the plurality of samples and for at least one first mesh element of the occluding object visible from the at least one sample, generating one shadow plane per edge of the at least one first mesh element, estimating a opacity level depending on coefficients of projection in a function base from values representative of the opacity for a set of intersection points between at least one ray having for origin a viewpoint of the scene and shadow planes crossed by said at least one ray, depending on an angle formed by the normal associated with each shadow plane crossed and by said at least one ray.