Generalized Image Acquisition and Analysis
Acquisition and Analysis of Bispectral Bidirectional Reflectance and Reradiation Distribution Functions
In fluorescent materials, light from a certain band of incident wavelengths is reradiated at longer wavelengths, i.e., with a reduced
per-photon energy. While fluorescent materials are common in everyday life, they have received little attention in computer graphics. Especially, no bidirectional reradiation measurements of fluorescent materials have been available so far. In this paper, we
extend the well-known concept of the bidirectional reflectance distribution function (BRDF) to account for energy transfer between
wavelengths, resulting in a Bispectral Bidirectional Reflectance
and Reradiation Distribution Function (bispectral BRRDF). Using
a bidirectional and bispectral measurement setup, we acquire reflectance and reradiation data of a variety of fluorescent materials,
including vehicle paints, paper and fabric, and compare their renderings with RGB, RGB×RGB, and spectral BRDFs. Our acquisition
is guided by a principal component analysis on complete bispectral
data taken under a sparse set of angles. We show that in order to
faithfully reproduce the full bispectral information for all other angles, only a very small number of wavelength pairs needs to be
measured at a high angular resolution.
Projects
State of the Art in Computational Fabrication and Display of Material Appearance.
Eurographics STAR 2013
Abstract
After decades of research on digital representations of
material and object appearance, computer graphics has more
recently turned to the problem of creating physical
artifacts with controllable appearance characteristics.
While this work has mostly progressed in two parallel
streams – display technologies as well as novel fabrication
processes – we believe there is a large overlap and the
potential for synergies between these two approaches. In
this report, we summarize research efforts from the worlds
of fabrication display, and categorize the different
approaches into a common taxonomy. We believe that this
report can serve as a basis for systematic exploration of
the design space in future research.
Bibtex
@inproceedings{Hullin13:STAR,
author = {Matthias B. Hullin and Ivo Ihrke and Wolfgang Heidrich and Tim Weyrich and Gerwin Damberg and Martin Fuchs},
title = {State of the Art in Computational Fabrication and Display of Material Appearance},
booktitle = {STAR Proceedings of Eurographics},
year = 2013,
pages = {xx--yy},
}
author = {Matthias B. Hullin and Ivo Ihrke and Wolfgang Heidrich and Tim Weyrich and Gerwin Damberg and Martin Fuchs},
title = {State of the Art in Computational Fabrication and Display of Material Appearance},
booktitle = {STAR Proceedings of Eurographics},
year = 2013,
pages = {xx--yy},
}