Image-based illumination on the GPU

Authors:
A. Barsi;L. Szirmay-Kalos;L. Szécsi
Affiliations:
Department of Control Engineering and Information Technology Budapest University of Technology and Economics Budapest, Magyar Tudósok krt., Hungary;Department of Control Engineering and Information Technology Budapest University of Technology and Economics Budapest, Magyar Tudósok krt., Hungary;Department of Control Engineering and Information Technology Budapest University of Technology and Economics Budapest, Magyar Tudósok krt., Hungary
Venue:
Machine Graphics & Vision International Journal
Year:
2005

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Abstract

In many computer graphics applications it is desirable to augment virtual objects with high dynamic range images representing the real environment. In order to provide an illusion that virtual objects are part of the real scene, illumination of the environment should be taken into account when rendering them. Proper calculation of the illumination from an environment map may be extremely expensive if we wish to account for occlusion, self shadowing and specular materials. In this paper we present a method that performs all the calculations on a per-frame basis, and is already real-time on non-cutting-edge hardware.