X. He, K. Torrance, F. Sillon, and D. Greenberg, A comprehensive physical model for light reflection, Computer Graphics 25 (1991), no. Annual Conference Series, 175-- 186. Home/Search Document Not in Database Summary Related Articles Check |
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Transfer Equations in Global Illumination - Arvo (1993) (4 citations) (Correct)
....information from these more detailed levels. Theories at the microscopic scale are usually needed to predict first order effects such as local scattering and absorption, which then enter into the simulations at the macroscopic scale. For instance, the physically based reflection model of He [16] employs wave optics to characterize reflection from rough surfaces, and this model can be used for global illumination [52] For many materials with complex microgeometries, there exists a natural hierarchy of scales, with geometrical optics taking over at the point when wave effects become ....
....of equation (21) expresses the density of particles reflected in any direction as a weighted sum of the incoming densities, and the weighting can depend strongly on both the incoming and outgoing directions. See Figure (8b) This phenomenon is also known as directional diffuse reflection [16]. Note that if we allow the kernel k b to include generalized functions, such as the Dirac delta function, then we can write ) F (s; ffi( Gamma ) which subsumes the case of specular reflection. Finally, we note that there are physical constraints on both F and k b . If the ....
Xiao D. He, Kenneth E. Torrance, Francois X. Sillion, and Donald P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics, 25(4):175--186, July 1991.
Reflection Space Image Based Rendering - Cabral, Olano, Nemec (1999) (29 citations) (Correct)
....Keywords: interactive rendering and shading, texture mapping, reflection mapping, image based rendering. 1 INTRODUCTION Offline rendering algorithms have to a great extent conquered physically accurate photo realism and complex synthetic shading. A result of over twenty years of research [1, 4, 5, 12, 15, 19, 21, 23], these techniques all solve the lighting or rendering equation [16] in some manner. The outstanding rendering challenge now becomes how to increase the performance of sophisticated shading algorithms without losing the advancements made in quality. Specifically, we are interested in interactive ....
HE, X. D., TORRANCE, K. E., SILLION, F. X., AND GREENBERG, D. P. A comprehensive physical model for light reflection. In Computer Graphics (SIGGRAPH '91 Proceedings) (July 1991), T. W. Sederberg, Ed., vol. 25, pp. 175--186.
Surface Reflectance Recognition and Real-World Illumination.. - Dror (Correct)
....but random surface micro structure, such as a flat substrate with randomly oriented V shaped grooves. They predict surface reflectance based on geometrical considerations and physical optics. Perhaps the most physically complete model to date is that of He, Torrance, Sillion, and Greenberg (HTSG) [42], original increased # d (a) b) increased # s increased # Figure 2.4. E#ects of the Ward model parameters on the model BRDF. Emitted radiance distributions are illustrated for light incident at 45 # to the normal. a) BRDF with #d = 5, #s = 05, # = 05. b) Same as (a) except that #d has ....
....at a distance, one cannot see the individual blades, but both their geometric structure and their reflectance properties will contribute to the BRDF of the observed surface. In fact, many physically based reflectance models are formulated in terms of surface texture below the visible scale (e.g. [42, 54, 69]) The remote sensing community also uses BRDFs to capture the average reflectance properties of structured surfaces [104] Recent work by Leung and Malik [59] Cula and Dana [19] and Varma and Zisserman [116] has shown that one can classify three dimensional textures from images using the ....
X. D. He, K. E. Torrance, F. S. Sillion, and D. P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics (SIGGRAPH), 25(4):175-- 86, 1991.
Multiscale Shaders for the Efficient Realistic Rendering of.. - Meyer, Neyret (2000) (1 citation) (Correct)
....to switch from geometry to mapping of Phong parameters, then to reflectance model according to the distance. Transitions from geometry to bump and from bump to reflectance have been proposed in [1, 5, 7] Several reflectance models based on the surface microgeometry have been developed [11, 24, 8, 17, 6, 10, 9]. Most of these models consist in proposing a representation of the matter distribution, then to integrate the local illumination while addressing the visibility of the details for the viewer and for the light (i.e. self shadows) Volume shaders All the models above are designed for surface ....
Xiao D. He, Kenneth E. Torrance, Franois X. Sillion, and Donald P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics (Proceedings of SIGGRAPH 91), 25(4):175--186, July 1991. ISBN 0-201-56291-X. Held in Las Vegas, Nevada.
A Simple Layered RGB BRDF Model - Granier, Heidrich (Correct)
.... plausible or to extend if in a more general way [13] Many complex representations have also been developed to simulate the influence of the underlying geometry (micro facet model [19, 1] or the subsurface scattering [4] or to obtain an accurate representation by a real physical model [5]. This last one has an accurate wavelength behaviour, but can t represent phenomena like interference and colour separation. To allow fast computation and an easy integration in global illumination problem (for an easy stochastic sampling) Ward [20] and Schlick [16] have introduced simpler ....
...., Ward [20] and Schlick [16] have introduced simpler models, between empirical and physical. Together with the Phong model and its variants, these are today the most commonly used due to their efficiency and their simplicity. But despite the complexity of, for example, the model by He et al. [5], none of these representations can simulate a number of non linear wavelength effects. One of these effects is the diffraction due to a non planar surface when the size of underlying micro geometry reaches the wavelength size, like those we can see on a CD ROM surface for example. Stam [17] has ....
X. D. He, K. E. Torrance, F. X. Sillion, , and D. P. Greenberg. A comprehensive physical model for light reflection. In T. W. Sederberg, editor, Computer Graphics (SIGGRAPH '91 Proceedings), volume 25, pages 175--186, July 1991.
Hardware Rendering with Bidirectional Reflectances - Kautz (1999) (2 citations) (Correct)
....with colour BRDF maps As mentioned earlier, we initially ignored the wavelength dependency of BRDFs. But texture mapping hardware and the frame buffer supports a red, green, and blue channel. This can be exploited to approximate wavelength dependent BRDFs (for example the HTSG model, see [HTSG91] First we have to convert the wavelength dependent data to the three colour We use as the variable for the wavelength instead of the traditional in order to avoid confusion. 22 channels red, green, and blue, i.e. and then run an SVD on each of the three data sets. To convert the ....
....Phong Model As shown in 2.2, the standard Phong reflectance model is non physical, being neither symmetric nor energy preserving. The following modification to Phong has these properties [LW94] We used to generate a BRDF. See Figure 7.2 for the lit surfaces. 7. 3 HTSG Model In 1991 He et al. HTSG91] introduced a physically based model for BRDFs that can be used to simulate materials like copper or gold. It is wavelength dependent. We first sampled the HTSG BRDF for rough copper ( at a wavelength of . The results are shown in Figure 7.3. The differences between the OpenGL rendered surface ....
Xiao D. He, Kenneth E. Torrance, Francois X. Sillion, and Donald P. Greenberg. A Comprehensive Physical Model for Light Reflection. In Computer Graphics (SIGGRAPH '91 Proceedings), volume 25, pages 175--186, July 1991. 58
Approximation of Glossy Reflection with Prefiltered Environment .. - Kautz, McCool (2000) (4 citations) (Correct)
....of the environment maps changes with elevation angle. This is visible on the lid of the teapot; the reflection in the 2D approximation is blurrier than it should be, although otherwise the approximation is adequate. The second wavelength dependent BRDF we tried was the HTSG model for rough copper [9]. The results can be seen in Figure 13 for the single lobe method and in Figure 14 for the single 2D lobe method (compare with Figure 12) A few slices of the prefiltered environment map for the single lobe approximation are depicted in Figure 8, where you can again see increased sharpness with ....
X. He, K. Torrance, F. Sillion, and D. Greenberg. A comprehensive physical model for light reflection. In Proc. SIGGRAPH, pages 175--186, July 1991.
Toward a Psychophysically-Based Light Reflection.. - Pellacini, Ferwerda, .. (2000) (9 citations) Self-citation (Greenberg) (Correct)
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He, X.D., Torrance, K.E., Sillion, F.X., and Greenberg, D.P. (1991) A comprehensive physical model for light reflection. Computer Graphics (SIGGRAPH 91 Conference Proceedings), 25(4), 175-- 186.
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Xiao D. He, Kenneth E. Torrance, Francois X. Sillion, and Donald P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics (SIGGRAPH '91 Proceedings) , 25(4):175--186, July 1991.
Submitted to the Department of - Electrical Engineering And (Correct)
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X. He, K. Torrance, F. Sillon, and D. Greenberg, A comprehensive physical model for light reflection, Computer Graphics 25 (1991), no. Annual Conference Series, 175-- 186.
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X. D. He, K. E. Torrance, F. X. Sillion, and D. P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics (SIGGRAPH 91), 25(4):175-186, 1991.
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HE,X.D.,TORRANCE,K.E.,SILLION,F.,AND GREENBERG, D. P. A comprehensive physical model for light reflection. In SIGGRAPH 91, (August 1991).
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HE, X. D., TORRANCE, K. E., SILLION, F., AND GREENBERG, D. P. A comprehensive physical model for light reflection. In SIGGRAPH 91, (August 1991).
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He, X. D., Torrance, K. E., Sillion, F. X., and Greenberg, D. P. A Comprehensive Physical Model for Light Reflection. Computer Graphics 25, 4 (July 1991), 175--186.
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Xiao D. He, Kenneth E. Torrance, Francois X. Sillion, and Donald P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics (Proceedings of SIGGRAPH 91), 25(4):175--186, July 1991.
Interactive Rendering with Arbitrary BRDFs using Separable.. - Jan Kautz And (1999) (22 citations) (Correct)
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X. He, K. Torrance, F. Sillion, and D. Greenberg. A Comprehensive Physical Model for Light Reflection. In Proc. SIGGRAPH, pages 175--186, July 1991.
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X. He, K. Torrance, F. Sillon, and D. Greenberg, A comprehensive physical model for light reflection, Computer Graphics 25 (1991), no. Annual Conference Series, 175-- 186.
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Xiao D. He, Kenneth E. Torrance, Francois X. Sillion, and Donald P. Greenberg. A comprehensive physical model for light reflection. Computer Graphics (Proc. ACM SIGGRAPH Conf.), 25(4). pp. 175-- 186 (1991).
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He X. D., Torrance K.E., Sillion F.X. and Greenberg D.P., A Comprehensive Physical Model for Light Reflection, Computer Graphics, Vol. 25 (4), July 1991, 175-186.
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X. He, K. Torrance, F. Sillion, and D. Greenberg. A Comprehensive Physical Model for Light Reflection. In Proc. SIGGRAPH, pages 175--186, July 1991.
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X. He, K. Torrance, F. Sillion, and D. Greenberg. A Comprehensive Physical Model for Light Reflection. In Proc. SIGGRAPH, pages 175--186, July 1991.
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