Results 171 to 180 of about 12,499 (195)

The D-BRDF model as a basis for BRDF acquisition

ACM SIGGRAPH 2007 posters, 2007
Real world materials exhibit characteristic surface reflectance, such as glossy or specular highlights, and anisotropy that need to be modeled accurately for realistic rendering applications. The surface reflectance of a material is formalized by the notion of the Bidirectional Reflectance Distribution Function (BRDF).
Abhijeet Ghosh, Wolfgang Heidrich
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Barycentric parameterizations for isotropic BRDFs

IEEE Transactions on Visualization and Computer Graphics, 2005
A bidirectional reflectance distribution function (BRDF) is often expressed as a function of four real variables: two spherical coordinates in each of the the "incoming" and "outgoing" directions. However, many BRDFs reduce to functions of fewer variables. For example, isotropic reflection can be represented by a function of three variables.
Michael M, Stark, James, Arvo, Brian, Smits   +2 more
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3D-Printing Spatially Varying BRDFs

IEEE Computer Graphics and Applications, 2013
A new method fabricates custom surface reflectance and spatially varying bidirectional reflectance distribution functions (svBRDFs). Researchers optimize a microgeometry for a range of normal distribution functions and simulate the resulting surface's effective reflectance.
Olivier Rouiller, Bernd Bickel, Jan Kautz, Wojciech Matusik, Marc Alexa   +4 more
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Comparison of microfacet BRDF model elements to diffraction BRDF model elements

SPIE Proceedings, 2015
A popular class of BRDF models is the microfacet model, where geometric optics is assumed, but where physical optics effects such as accurate wavelength scaling, important to Hyperspectral Imagery, are lost. More complex physical optics models may more accurately predict the BRDF, but the calculation is time-consuming.
Samuel D. Butler, Stephen E. Nauyoks, Michael A. Marciniak   +2 more
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Global albedo, BRDF and nadir BRDF-adjusted reflectance products from MODIS

IEEE International Geoscience and Remote Sensing Symposium, 2003
Annual sequences of the first reprocessed albedo, bidirectional reflectance distribution function (BRDF), and nadir BRDF-adjusted surface reflectance (NBAR) products are being evaluated. BRDF model parameters (or weights) are used to compute black sky albedo at local solar noon and white sky albedo and to compute surface reflectance at a common nadir ...
C. Schaaf, A. Strahler, null Feng Gao, W. Lucht, null Yufang Jin, null Xiaowen Li, null Xiaoyang Zhang, E. Tsvetsinskaya, J.-P. Muller, P. Lewis, M. Barnsley, G. Roberts, C. Doll, null Shunlin Liang, D. Roy, J. Privette   +15 more
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Efficient polarimetric BRDF transformations

SPIE Proceedings, 2016
In order to characterize a target, the basic information that is of interest is spectral, polarization and distance. Imaging spectropolarimetry is a powerful tool for obtaining the polarization state of a scene and to discriminate manmade objects in a cluttered background.
Stefan Björkert, Ingmar G. E. Renhorn
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Parameterization of Tabulated BRDFs

Proceedings of the 33rd Computer Graphics International, 2016
Measured or simulated data for bidirectional reflectance distribution functions (BRDFs) of various materials is typically stored in a tabulated form by discretizing incoming and outgoing directions over the hemisphere. Since reflected radiance is usually strongly nonuniform over the hemisphere, a uniform discretization of a BRDF usually leads to poor ...
Ian Mallett, Cem Yuksel
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Neural Layered BRDFs

Special Interest Group on Computer Graphics and Interactive Techniques Conference Proceedings, 2022
Jiahui Fan, Beibei Wang, Milos Hasan, Jian Yang, Ling-Qi Yan   +4 more
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BRDFs Who’s Who

2017
Now that you're familiar with the principles of physically based shading and how to ensure your BRDF implementation respects them, we can explore some of the BRDFs described in past papers.
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BRDF dílna

2012
This thesis develops an application for interactive experiments with BRDF functions. Arbitrary BRDF function may be specified with an analytic formula, including arbitrary number of parameters. A simple scene is displayed, using specified BRDF. The parameters can be modified which has an immediate impact to the scene's appearance.
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