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• Bidirectional_scattering_distribution_function abstract "The definition of the BSDF (bidirectional scattering distribution function) is not well standardized. The term was probably introduced in 1980 by Bartell, Dereniak, and Wolfe. Most often it is used to name the general mathematical function which describes the way in which the light is scattered by a surface. However in practice this phenomenon is usually split into the reflected and transmitted components, which are then treated separately as BRDF (bidirectional reflectance distribution function) and BTDF (bidirectional transmittance distribution function). BSDF is a superset and the generalization of the BRDF and BTDF. The concept behind all BxDF functions could be described as a black box with the inputs being any two angles, one for incoming (incident) ray and the second one for the outgoing (reflected or transmitted) ray at a given point of the surface. The output of this black box is the value defining the ratio between the incoming and the outgoing light energy for the given couple of angles. The content of the black box may be a mathematical formula which more or less accurately tries to model and approximate the actual surface behavior or an algorithm which produces the output based on discrete samples of measured data. This implies that the function is 4 (+1) dimensional (4 values for 2 3D angles + 1 optional for wavelength of the light), which means that it cannot be simply represented by 2D and not even by a 3D graph. Each 2D or 3D graph, sometimes seen in the literature, shows only a slice of the function. Some tend to use the term BSDF simply as a category name covering the whole family of BxDF functions. The term BSDF is sometimes used in a slightly different context, for the function describing the amount of the scatter (not scattered light), simply as a function of the incident light angle. An example to illustrate this context: for perfectly lambertian surface the BSDF(angle)=const. This approach is used for instance to verify the output quality by the manufacturers of the glossy surfaces. Another recent usage of the term BSDF can be seen in some 3D packages, when vendors use it as a 'smart' category to encompass the simple well known cg algorithms like Phong, Blinn–Phong etc. Acquisition of the BSDF over the human face in 2000 by Debevec et al. was one of the last key breakthroughs on the way to fully virtual cinematography with its ultra-photorealistic digital look-alikes. The team was the first in the world to isolate the subsurface scattering component ( a specialized case of BTDF ) using the simplest light stage, consisting on moveable light source, moveable high-res digital camera, 2 polarizers in a few positions and really simple algorithms on a modest computer. The team utilized the existing scientific knowledge that light that is reflected and scattered from the air-to-oil layer retains its polarization while light that travels within the skin loses its. The subsurface scattering component can be simulated as a steady high-scatter glow of light from within the models, without which the skin does not look realistic. ESC Entertainment, a company set up by Warner Brothers Pictures specially to do the visual effects / virtual cinematography system for the Matrix Reloaded and Matrix Revolutions isolated the parameters for an approximate analytical BRDF which consisted of lambertian diffusion component and a modified specular Phong component with a Fresnel type of effect.↑ ↑ 2.0 2.1 2.2 ↑".
• Bidirectional_scattering_distribution_function thumbnail BSDF05_800.png?width=300.
• Bidirectional_scattering_distribution_function wikiPageID "4990900".
• Bidirectional_scattering_distribution_function wikiPageLength "7644".
• Bidirectional_scattering_distribution_function wikiPageOutDegree "42".
• Bidirectional_scattering_distribution_function wikiPageRevisionID "689664464".
• Bidirectional_scattering_distribution_function wikiPageWikiLink 3D_modeling.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Algorithm.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Bidirectional_reflectance_distribution_function.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Bidirectional_texture_function.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Blinn–Phong_shading_model.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Category:3D_rendering.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Category:Astrophysics.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Category:Radiometry.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Computer.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Computer_simulation.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Diffusion.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Digital_camera.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Digital_look-alike.
• Bidirectional_scattering_distribution_function wikiPageWikiLink ESC_Entertainment.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Existence.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Face.
• Bidirectional_scattering_distribution_function wikiPageWikiLink File:BSDF05_800.png.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Fresnel_equations.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Lambertian_reflectance.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Light.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Light_stage.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Paul_Debevec.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Phong_reflection_model.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Polarization_(waves).
• Bidirectional_scattering_distribution_function wikiPageWikiLink Polarizer.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Radiance.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Radiometry.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Reflectance.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Science.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Skin.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Specular_reflection.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Subsurface_scattering.
• Bidirectional_scattering_distribution_function wikiPageWikiLink The_Matrix_Reloaded.
• Bidirectional_scattering_distribution_function wikiPageWikiLink The_Matrix_Revolutions.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Virtual_cinematography.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Visual_effects.
• Bidirectional_scattering_distribution_function wikiPageWikiLink Warner_Bros..
• Bidirectional_scattering_distribution_function wikiPageWikiLink File:BSSDF01_400.svg.
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "BSDF".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "BSSRDF".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "Bidirectional scattering distribution function".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "Bidirectional scattering distribution function#Overview of the BxDF functions".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "Bidirectional surface scattering reflectance distribution functions".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "Bidirectional_scattering_distribution_function".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "bidirectional scattering distribution function".
• Bidirectional_scattering_distribution_function wikiPageWikiLinkText "captured and simulated adequately".
• Bidirectional_scattering_distribution_function wikiPageUsesTemplate Template:Clarify.
• Bidirectional_scattering_distribution_function wikiPageUsesTemplate Template:Portal.
• Bidirectional_scattering_distribution_function wikiPageUsesTemplate Template:Reflist.
• Bidirectional_scattering_distribution_function subject Category:3D_rendering.
• Bidirectional_scattering_distribution_function subject Category:Astrophysics.
• Bidirectional_scattering_distribution_function subject Category:Radiometry.
• Bidirectional_scattering_distribution_function type Astrophysic.
• Bidirectional_scattering_distribution_function type Sub-discipline.
• Bidirectional_scattering_distribution_function comment "The definition of the BSDF (bidirectional scattering distribution function) is not well standardized. The term was probably introduced in 1980 by Bartell, Dereniak, and Wolfe. Most often it is used to name the general mathematical function which describes the way in which the light is scattered by a surface.".
• Bidirectional_scattering_distribution_function label "Bidirectional scattering distribution function".
• Bidirectional_scattering_distribution_function sameAs Q4904187.
• Bidirectional_scattering_distribution_function sameAs m.0cysws.
• Bidirectional_scattering_distribution_function sameAs Q4904187.
• Bidirectional_scattering_distribution_function sameAs 雙向散射分佈函數.
• Bidirectional_scattering_distribution_function wasDerivedFrom Bidirectional_scattering_distribution_function?oldid=689664464.
• Bidirectional_scattering_distribution_function depiction BSDF05_800.png.
• Bidirectional_scattering_distribution_function isPrimaryTopicOf Bidirectional_scattering_distribution_function.