Results 141 to 150 of about 1,253 (181)

To derive BRDF archetypes from POLDER-3 BRDF database

2014 IEEE Geoscience and Remote Sensing Symposium, 2014
In this study, based on kernel-driven linear BRDF model, a new spectral vegetation index named anisotropic flat index (AFX) and a hotspot kernel function are described. Anisotropic Flat Index (AFX), which is created by normalization of net scattering magnitude with the isotropic scattering, can summarize the variability of basic dome-bowl anisotropic ...
Ziti Jiao, Yadong Dong, Hu Zhang 0001, Xiaowen Li 0001   +3 more
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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 E. Smits   +2 more
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BRDF display

Proceedings of the 2008 workshop on Immersive projection technologies/Emerging display technologiges, 2008
We developed a bidirectional reflectance distribution function (BRDF) display that reproduces the texture of objects and rays of a light field. Our BRDF display is based on the technology used in integral photography (IP), which was originally investigated for use in 3D displays.
Takafumi Koike, Takeshi Naemura
openaire   +1 more source

An Adaptive BRDF Fitting Metric

Computer Graphics Forum, 2020
AbstractWe propose a novel image‐driven fitting strategy for isotropic BRDFs. Whereas existing BRDF fitting methods minimize a cost function directly on the error between the fitted analytical BRDF and the measured isotropic BRDF samples, we also take into account the resulting material appearance in visualizations of the BRDF.
James C. Bieron, Pieter Peers
exaly   +3 more sources

View planning for BRDF acquisition

ACM SIGGRAPH 2003 Sketches & Applications, 2003
The estimation of the bi-directional reflectance distribution function (BRDF) of a 3D object requires reflectance measurements under numerous viewing and lighting directions. This sketch summarizes our method to select advantageous directions.
Lang, J., Seidel, H. ; https://orcid.org/0000-0002-1343-8613, Lensch, H.   +2 more
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A Unified Algorithm for BRDF Matching

2019
This paper generalizes existing BRDF fitting algorithms presented in the literature that aims to find a mapping of the parameters of an arbitrary source material model to the parameters of a target material model. A material model in this context is a function that maps a list of parameters, such as roughness or specular color, to a BRDF.
Ron Vanderfeesten, Jacco Bikker
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Polarization BRDF

OSA Annual Meeting, 1993
By combining scatterometry with polarimetry, a polarization dependent BRDF is measured with the potential to separate roughness, contamination, and subsurface damage. Two instruments which measure the polarization BRDF will be presented and results discussed.
Stephen C. McClain, Russell A. Chipman
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A microfacet-based BRDF generator

Proceedings of the 27th annual conference on Computer graphics and interactive techniques - SIGGRAPH '00, 2000
A method is presented that takes as an input a 2D microfacet orientation distribution and produces a 4D bidirectional reflectance distribution function (BRDF). This method differs from previous microfacet-based BRDF models in that it uses a simple shadowing term which allows it to handle very general microfacet distributions while maintaining ...
Michael Ashikhmin, Simon Premoze, Peter Shirley   +2 more
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BRDF Acquisition with Basis Illumination

2007 IEEE 11th International Conference on Computer Vision, 2007
Realistic descriptions of surface reflectance have long been a topic of interest in both computer vision and computer graphics research. In this paper, we describe a novel and fast approach for the acquisition of bidirectional reflectance distribution functions (BRDFs). We develop a novel theory for directly measuring BRDFs in a basis representation by
Abhijeet Ghosh, Shruthi Achutha, Wolfgang Heidrich, Matthew O'Toole   +3 more
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Neural Layered BRDFs

Special Interest Group on Computer Graphics and Interactive Techniques Conference Proceedings, 2022
Jiahui Fan, Beibei Wang 0002, Milos Hasan, Jian Yang 0003, Ling-Qi Yan 0001   +4 more
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