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A Novel Hemispherical Basis for Accurate and Efficient Rendering [article]

Pascal Gautron, Jaroslav Krivanek, Sumanta Pattanaik, Kadi Bouatouch
2004 Symposium on Rendering  
We demonstrate the usefulness of this basis for representation of surface reflectance functions, rendering using environment maps and for efficient global illumination computation using radiance caching  ...  This basis can be efficiently combined with spherical harmonics in applications involving both hemispherical and spherical data.  ...  Thanks also to Daniel Meneveaux for proofreading early versions of this paper and providing helpful comments and suggestions.  ... 
doi:10.2312/egwr/egsr04/321-330 fatcat:6ccjvqnhr5ahnatmf2xolu7guy

Efficient BRDF Sampling Using Projected Deviation Vector Parameterization

Tanaboon Tongbuasirilai, Jonas Unger, Murat Kurt
2017 2017 IEEE International Conference on Computer Vision Workshops (ICCVW)  
This paper presents a novel approach for efficient sampling of isotropic Bidirectional Reflectance Distribution Functions (BRDFs).  ...  We show that BRDFs can be efficiently and accurately measured in this space using simple mechanical measurement setups.  ...  We show how this property can be exploited to enable efficient and accurate measurement of isotropic BRDFs in a single planar slice of the standard 4D hemispherical parameterization (ω i , ω o ).  ... 
doi:10.1109/iccvw.2017.26 dblp:conf/iccvw/TongbuasirilaiU17 fatcat:2ejlvf5ujbektcjq5dmitbhaa4

Efficient irradiance normal mapping

Ralf Habel, Michael Wimmer
2010 Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games - I3D 10  
In order to represent the irradiance signals efficiently, we propose a novel polynomial, hemispherically orthonormal basis function set that is specifically designed to carry a directional irradiance signal  ...  Though there are dedicated bases for this purpose such as the Half-Life 2 basis, higher order basis functions such as quadratic Spherical Harmonics are needed for an accurate representation.  ...  We showed that 4 coefficients are sufficient for a perceptually acceptable irradiance representation and 6 coefficients for a numerically accurate representation.  ... 
doi:10.1145/1730804.1730835 dblp:conf/si3d/HabelW10 fatcat:l4bprkj7zjcgrgbixuiir3hhmq

Physically Based Real-Time Translucency for Leaves [article]

Ralf Habel, Alexander Kusternig, Michael Wimmer
2007 Symposium on Rendering  
For real-time rendering of this model, we formulate it as an image convolution process and express the result in an efficient directional basis that is fast to evaluate.  ...  This paper presents a new shading model for real-time rendering of plant leaves that reproduces all important attributes of a leaf and allows for a large number of leaves to be shaded.  ...  The authors would like to thank Oliver Mattausch and Thomas Gamper for very helpful discussions and comments.  ... 
doi:10.2312/egwr/egsr07/253-263 fatcat:qcvqp4ag3jcnjjepvg4tts5pk4

Reflectance Sharing: Image-based Rendering from a Sparse Set of Images [article]

Todd Zickler, Sebastian Enrique, Ravi Ramamoorthi, Peter Belhumeur
2005 Symposium on Rendering  
We present an alternative approach that enables an increase in the angular accuracy of a spatially-varying reflectance function in exchange for a decrease in spatial resolution.  ...  Since the BRDF typically varies slowly from point to point over much of an object's surface, this method enables image-based rendering from a sparse set of images without assuming a parametric reflectance  ...  Acknowledgments We thank Aner Ben-Artzi for his helpful comments and for his work on hardware rendering using the GPU. This work was funded in part by the National Science Foundation. S.  ... 
doi:10.2312/egwr/egsr05/253-264 fatcat:jzgcnhqxtrh3xh7apc4dv77x4q

Cosine Lobe Based Relighting from Gradient Illumination Photographs

Graham Fyffe, Cyrus A. Wilson, Paul Debevec
2009 2009 Conference for Visual Media Production  
For materials with wavelength-dependent scattering, a better fit can be obtained using independent cosine lobes for the red, green, and blue channels, obtained from three monochromatic gradient illumination  ...  The other is non-zero everywhere, which works well for broadly scattering materials and still produces visually plausible results for diffuse and specular materials.  ...  We would also like to thank Monica Nichelson, Bill Swartout, and Randall Hill for their support and assistance with this work.  ... 
doi:10.1109/cvmp.2009.18 fatcat:rbizye7ntfbdnc4yk2j6hztouy

Cosine lobe based relighting from gradient illumination photographs

Graham Fyffe
2009 SIGGRAPH '09: Posters on - SIGGRAPH '09  
For materials with wavelength-dependent scattering, a better fit can be obtained using independent cosine lobes for the red, green, and blue channels, obtained from three monochromatic gradient illumination  ...  The other is non-zero everywhere, which works well for broadly scattering materials and still produces visually plausible results for diffuse and specular materials.  ...  We would also like to thank Monica Nichelson, Bill Swartout, and Randall Hill for their support and assistance with this work.  ... 
doi:10.1145/1599301.1599381 dblp:conf/siggraph/Fyffe09 fatcat:ckzkzv2pdne2tmicfcyqunwimm

Image-based rendering from a sparse set of images

Todd Zickler, Sebastian Enrique, Ravi Ramamoorthi, Peter Belhumeur
2005 ACM SIGGRAPH 2005 Sketches on - SIGGRAPH '05  
We present an alternative approach that enables an increase in the angular accuracy of a spatially-varying reflectance function in exchange for a decrease in spatial resolution.  ...  Since the BRDF typically varies slowly from point to point over much of an object's surface, this method enables image-based rendering from a sparse set of images without assuming a parametric reflectance  ...  On a GeForce FX 5900, rendering a 512 × 512 image with 2000 centers (and 2000 rendering passes) is reasonably efficient, taking approximately 30s.  ... 
doi:10.1145/1187112.1187290 dblp:conf/siggraph/ZicklerERB05 fatcat:egca7cmk7zbelh7xrj5jj4dq64

Efficient Wavelet Rotation for Environment Map Rendering [article]

Rui Wang, Ren Ng, David Luebke, Greg Humphreys
2006 Symposium on Rendering  
Our technique improves on previous work by eliminating the need for prefiltering environment maps, and is thus significantly faster for accurate rendering of dynamic environment lighting with high frequency  ...  Wavelets are superior at approximating high frequency signals such as detailed high dynamic range lighting and very shiny BRDFs, but present difficulties for interactive rendering due to the lack of an  ...  [GKPB04] presented a novel hemispherical basis for efficient representation of hemispherical functions. Sloan et al.  ... 
doi:10.2312/egwr/egsr06/173-182 fatcat:t7tr73ahuzd2vhc7ekfbsecxpa

Radiance Cache Splatting: A GPU-Friendly Global Illumination Algorithm [article]

Pascal Gautron, Jaroslav Krivánek, Kadi Bouatouch, Sumanta Pattanaik
2005 Symposium on Rendering  
This paper proposes a novel approach to global illumination using irradiance and radiance cache: the radiance cache splatting.  ...  Fast global illumination computation is a challenge in several fields such as lighting simulation and computergenerated visual effects for movies.  ...  In this paper we propose to reduce this cost by using a sampling plane along with an accurate, novel compensation method.  ... 
doi:10.2312/egwr/egsr05/055-064 fatcat:63l7zqecpvbqzozs42puzptk7a

Radiance cache splatting

Pascal Gautron, Jaroslav Křivánek, Kadi Bouatouch, Sumanta Pattanaik
2008 ACM SIGGRAPH 2008 classes on - SIGGRAPH '08  
This paper proposes a novel approach to global illumination using irradiance and radiance cache: the radiance cache splatting.  ...  Fast global illumination computation is a challenge in several fields such as lighting simulation and computergenerated visual effects for movies.  ...  In this paper we propose to reduce this cost by using a sampling plane along with an accurate, novel compensation method.  ... 
doi:10.1145/1401132.1401231 dblp:conf/siggraph/GautronKBP08 fatcat:j6a4n63pibeknjuayd3j63znje

Radiance cache splatting

Pascal Gautron, Jaroslav Křivánek, Kadi Bouatouch, Sumanta Pattanaik
2005 ACM SIGGRAPH 2005 Sketches on - SIGGRAPH '05  
This paper proposes a novel approach to global illumination using irradiance and radiance cache: the radiance cache splatting.  ...  Fast global illumination computation is a challenge in several fields such as lighting simulation and computergenerated visual effects for movies.  ...  In this paper we propose to reduce this cost by using a sampling plane along with an accurate, novel compensation method.  ... 
doi:10.1145/1187112.1187154 dblp:conf/siggraph/GautronKBP05 fatcat:35cwu24k65c4tfjrtujmeosxxy

Wavelet encoding of BRDFs for real-time rendering

Luc Claustres, Loïc Barthe, Mathias Paulin
2007 Graphics Interface  
Threedimensional texture mapping with indexing allows us to efficiently compress the BRDF data by exploiting much of the coherency between hemispherical data.  ...  This technique increases rendering performance on distant surfaces while maintaining accurate appearance of close ones.  ...  We provide a novel multiresolution representation that allows the real-time rendering of BRDF at different LODs and the filtering of specular highlights without additional memory cost.  ... 
doi:10.1145/1268517.1268546 dblp:conf/graphicsinterface/ClaustresBP07 fatcat:myasozrdunhpbexbp33gza5j6e

Neural Radiosity [article]

Saeed Hadadan, Shuhong Chen, Matthias Zwicker
2021 arXiv   pre-print
Our approach decouples solving the rendering equation from rendering (perspective) images similar as in traditional radiosity techniques, and allows us to efficiently synthesize arbitrary views of a scene  ...  Our approach leads to an algorithm that is simple to implement, and we demonstrate its effectiveness on a variety of scenes with non-diffuse surfaces.  ...  Additional Key Words and Phrases: Neural Rendering, Neural Radiance Field INTRODUCTION In this paper, we introduce a novel approach to solve the rendering equation [Kajiya 1986 ] using deep learning  ... 
arXiv:2105.12319v1 fatcat:6nr62aopaff6tdtbmhw3lp36vm

An efficient representation for irradiance environment maps

Ravi Ramamoorthi, Pat Hanrahan
2001 Proceedings of the 28th annual conference on Computer graphics and interactive techniques - SIGGRAPH '01  
, and new representations for lighting design and image-based rendering.  ...  These observations lead to a simple and efficient procedural rendering algorithm amenable to hardware implementation, a prefiltering method up to three orders of magnitude faster than previous techniques  ...  This work was supported in part by a Hodgson-Reed Stanford graduate fellowship and NSF ITR grant #0085864 "Interacting with the Visual World."  ... 
doi:10.1145/383259.383317 dblp:conf/siggraph/RamamoorthiH01a fatcat:oo74jwkcpraqnmdjc47zeiabcq
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