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Efficient and Accurate Rendering of Complex Light Sources
Author(s) -
Kniep S.,
Häring S.,
Magnor M.
Publication year - 2009
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/j.1467-8659.2009.01484.x
Subject(s) - radiance , computer science , rendering (computer graphics) , position (finance) , computer vision , algorithm , range (aeronautics) , artificial intelligence , optics , physics , materials science , finance , economics , composite material
Abstract We present a new method for estimating the radiance function of complex area light sources. The method is based on Jensen's photon mapping algorithm. In order to capture high angular frequencies in the radiance function, we incorporate the angular domain into the density estimation. However, density estimation in position‐direction space makes it necessary to find a tradeoff between the spatial and angular accuracy of the estimation. We identify the parameters which are important for this tradeoff and investigate the typical estimation errors. We show how the large data size, which is inherent to the underlying problem, can be handled. The method is applied to different automotive tail lights. It can be applied to a wide range of other real‐world light sources.