METHOD AND DEVICE FOR ESTIMATING LIGHT SCATTERING

摘要

A method and device for estimating the quantity of light received by an element of at least a participating medium belonging to a light ray crossing the at least a participating medium and having as origin a light source. As to optimize the estimation and the rendering of the at least a medium, the method comprises determining a pseudo-metric function according to intersection points between the participating medium and the light ray, the pseudo-metric function representing the distance only along the part(s) of the light ray crossing the participating medium; estimating first projection coefficients in a functions basis, the first coefficients being representative of an extinction function along the light ray according to the pseudo-metric function; and estimating the quantity of light received by the element according to the first projection coefficients.

主权项

1. A method of estimating a quantity of light received by at least an element of at least a participating medium, the at least an element belonging to a light ray crossing the at least a participating medium and having as origin a light source, wherein the method comprises:
determining a pseudo-metric function according to intersection points between the at least a participating medium and the light ray, the pseudo-metric function being determined in such a way as to be representative of distance only along the part of the light ray crossing the at least a participating medium, estimating first projection coefficients in a functions basis, said first coefficients being representative of an extinction function along said light ray according to said pseudo-metric function, estimating the quantity of light received by the at least an element according to said first projection coefficients.