Dynamic Display of BRDFs
This paper deals with the challenge of physically displaying reflectance, i.e., the appearance of a surface and its variation with the observer position and the illuminating environment. This is commonly described by the bidirectional reflectance distribution function (BRDF). We provide a catalogue of criteria for the display of BRDFs, and sketch a few orthogonal approaches to solving the problem in an optically passive way. Our specific implementation is based on a liquid surface, on which we excite waves in order to achieve a varying degree of anisotropic roughness. The resulting probability density function of the surface normal is shown to follow a Gaussian distribution similar to most established BRDF models.
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Measuring BRDFs of Immersed Materials
In: Proceedings of VMV 2011.
Abstract
We investigate the effect of immersing real-world materials
into media of different refractive indices. We show, that
only some materials follow the Fresnel-governed
behaviour. In reality, many materials exhibit unexpected
effects such as stronger localized highlights or a
significant increase in the glossy reflection due to
microgeometry. In this paper, we propose a new measurement
technique that allows for measuring the BRDFs of materials
that are immersed into different media.
Bibtex
@InProceedings{Berger11,
author = {Kai Berger and Ilya Reshetouski and Marcus A. Magnor and Ivo Ihrke},
title = "{Measuring BRDFs of Immersed Materials}",
booktitle = {Proceedings of VMV},
pages = "325--330",
year = {2011},
}
author = {Kai Berger and Ilya Reshetouski and Marcus A. Magnor and Ivo Ihrke},
title = "{Measuring BRDFs of Immersed Materials}",
booktitle = {Proceedings of VMV},
pages = "325--330",
year = {2011},
}