High-dynamic-range camera-based bidirectional reflectance distribution function measurement system for isotropic materials

We present a novel high-dynamic-range (HDR) camera-based bidirectional reflectance distribution function (BRDF) measurement system that can measure the reflectance property of isotropic materials. Our developed system can measure the BRDF of highly specular materials much faster than previous system...

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Bibliographic Details
Published in:Optical Engineering 2009-09, Vol.48 (9), p.093601-0936011
Main Authors: Kim, Duck Bong, Park, Kang Su, Kim, Kang Yeon, Seo, Myoung Kook, Lee, Kwan H
Format: Article
Language:English
Subjects:
Bidirectional reflectance
bidirectional reflectance distribution function acquisition
Calibration
Distribution functions
high-dynamic-range camera
image-based system
isotropic material
realistic rendering
Reciprocity
Reflectance
Reflection
Reflectivity
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Summary:We present a novel high-dynamic-range (HDR) camera-based bidirectional reflectance distribution function (BRDF) measurement system that can measure the reflectance property of isotropic materials. Our developed system can measure the BRDF of highly specular materials much faster than previous systems. It measures highly dense BRDF samples for a wider reflection angle with less noise so that it provides accuracy that is necessary for computer graphics application. To estimate the reflectance of a given material, we perform an absolute photometric calibration for the HDR camera. Our system is verified by checking the Helmholtz reciprocity and comparing the performance with that of previous image-based systems. The capability and efficiency of the developed system is demonstrated by comparing the images generated by measure-and-fit and direct-rendering methods using the measured data of four different isotropic materials.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.3223247