Wavelet encoding of BRDFs for real-time rendering

Claustres, Luc; Barthe, Loïc; Paulin, Mathias

doi:10.1145/1268517.1268546

Cited by 11 publications

(4 citation statements)

References 43 publications

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“…N. Noé and B. Péroche have employed a hierarchical approach and locally supported functions [93]. L. Claustres et al have employed wavelets for representing and efficiently rendering materials [94,95]. C. Soler et al benefit from a Gaussian process for representing, managing and interpolating BRDF data [96,97].…”

Section: Brdf Parameterization and Fittingmentioning

confidence: 99%

Modeling, measuring, and using BRDFs: significant French contributions

et al. 2019

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The scattering of light by a surface is described by the Bidirectional Reflectance Distribution Function (BRDF). Unfortunately, this function cannot be straightforwardly acquired nor modeled. French researchers have proposed interesting contributions in the field, with several models and accurate experimental systems. For instance, the National Metrological Institute (LNE-CNAM) has implemented the best angular resolution goniospectrophotometer (0.015 o ). Modeling the BRDF has also been deeply studied in France, especially with the microfacet theory these recent years, a better understanding of the shadowing/masking function, new general distribution functions, visible normals, interfaced Lambertian microfacets and analysis concerning light multiple reflections. This paper proposes a state of the art concerning some significant French contributions in these fields.

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Section: Brdf Parameterization and Fittingmentioning

confidence: 99%

Modeling, measuring, and using BRDFs: significant French contributions

et al. 2019

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“…Interactively rendering arbitrary BRDFs has also been done using separable approximations [8], homeomorphic factorization [9], spherical harmonics compactness properties [10], and spectral properties [11]. Claustres et al [12] provide real-time rendering of acquired data using the sparsity of a wavelet representation and low rank of the reflection operator. Wang et al [13] proposed a real-time rendering technique based on a spherical Gaussian approximation of the BRDF.…”

Section: Related Workmentioning

confidence: 99%

Interactive Rendering of Acquired Materials on Dynamic Geometry Using Frequency Analysis

Bagher

Soler

Subr

et al. 2013

IEEE Trans. Visual. Comput. Graphics

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Shading acquired materials with high-frequency illumination is computationally expensive. Estimating the shading integral requires multiple samples of the incident illumination. The number of samples required may vary across the image, and the image itself may have high- and low-frequency variations, depending on a combination of several factors. Adaptively distributing computational budget across the pixels for shading is a challenging problem. In this paper, we depict complex materials such as acquired reflectances, interactively, without any precomputation based on geometry. In each frame, we first estimate the frequencies in the local light field arriving at each pixel, as well as the variance of the shading integrand. Our frequency analysis accounts for combinations of a variety of factors: the reflectance of the object projecting to the pixel, the nature of the illumination, the local geometry and the camera position relative to the geometry and lighting. We then exploit this frequency information (bandwidth and variance) to adaptively sample for reconstruction and integration. For example, fewer pixels per unit area are shaded for pixels projecting onto diffuse objects, and fewer samples are used for integrating illumination incident on specular objects.

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“…Interactively rendering arbitrary BRDFs has also been done using separable approximations [Kautz and McCool 1999], homeomorphic factorization [Latta and Kolb 2002], spherical harmonics compactness properties and spectral properties [Ramamoorthi and Hanrahan 2002]. Wavelet encoding of BRDFs [Claustres et al 2007] also provides real time rendering of acquired data by taking advantage of the sparsity of the wavelet representation and low rank of the reflection operator. Recently Wang et al [2009] proposed a real-time rendering technique based on a spherical Gaussian approximation of the BRDF.…”

Section: Related Workmentioning

confidence: 99%

Interactive rendering of acquired materials on dynamic geometry using bandwidth prediction

Bagher

Soler

Subr

et al. 2012

Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games

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We accelerate the shading of acquired materials by selectively shading pixels (white pixels in (d)) using bandwidth prediction (b), and adapting across pixels the number of samples used in the integration to the estimated illuminant variance (c). Our technique makes it possible to interactively render acquired materials while editing the geometry (material: red-metallic-paint). AbstractShading complex materials such as acquired reflectances in multilight environments is computationally expensive. Estimating the shading integral involves sampling the incident illumination independently at several pixels. The number of samples required for this integration varies across the image, depending on an intricate combination of several factors. Adaptively distributing computational budget across the pixels for shading is therefore a challenging problem. In this paper we depict complex materials such as acquired reflectances, interactively, without any precomputation based on geometry. We first estimate the approximate spatial and angular variation in the local light field arriving at each pixel. This local bandwidth accounts for combinations of a variety of factors: the reflectance of the object projecting to the pixel, the nature of the illumination, the local geometry and the camera position relative to the geometry and lighting. We then exploit this bandwidth information to adaptively sample for reconstruction and integration. For example, fewer pixels per area are shaded for pixels projecting onto diffuse objects, and fewer samples are used for integrating illumination incident on specular objects.

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Wavelet encoding of BRDFs for real-time rendering

Cited by 11 publications

References 43 publications

Modeling, measuring, and using BRDFs: significant French contributions

Modeling, measuring, and using BRDFs: significant French contributions

Interactive Rendering of Acquired Materials on Dynamic Geometry Using Frequency Analysis

Interactive rendering of acquired materials on dynamic geometry using bandwidth prediction

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