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Function of four real variables that defines how light is reflected at an opaque surface
The bidirectional reflectance distribution function (BRDF), symbol f r ( ω i , ω r ) {\displaystyle f_{\text{r}}(\omega _{\text{i}},\,\omega _{\text{r}})}
Bidirectional reflectance distribution function
Bidirectional_reflectance_distribution_function
Mathematical function
split into the reflected and transmitted components, which are then treated separately as the bidirectional reflectance distribution function (BRDF) and bidirectional
Bidirectional scattering distribution function
Bidirectional_scattering_distribution_function
Capacity of an object to reflect light
It is related to the bidirectional reflectance distribution function and its upper limit is 1. Another measure of reflectance, depending only on the
Reflectance
Computer graphics method
typically expressed as a bidirectional reflectance distribution function (BRDF) or bidirectional transmission distribution function (BTDF). The equation is
Path_tracing
Integral equation
rendering, describing the relationships between the bidirectional reflectance distribution function (BRDF) and the radiometric quantities used in rendering
Rendering_equation
Bidirectional texture function (BTF) is a 6-dimensional function depending on planar texture coordinates (x,y) as well as on view and illumination spherical
Bidirectional texture function
Bidirectional_texture_function
Computer graphics technique
photorealism. Feasible and quick approximations of the bidirectional reflectance distribution function and rendering equation are of mathematical importance
Physically_based_rendering
Shading algorithm in computer graphics
Pioneer anomaly. Bidirectional reflectance distribution function – Function of four real variables that defines how light is reflected at an opaque surface
Phong_reflection_model
Two-pass global illumination rendering algorithm
ends. If the photon reflects, the surface's bidirectional reflectance distribution function is used to determine the ratio of reflected radiance. Finally
Photon_mapping
GPU for mobile devices, used by Nintendo on their 3DS consoles
instead of per vertex), procedural texture generation, bidirectional reflectance distribution function (BRDF), Cook-Torrance specular highlights, polygon
PICA200
A gonioreflectometer is a device for measuring a bidirectional reflectance distribution function (BRDF). The device consists of a light source illuminating
Gonioreflectometer
Ratio of how much light is reflected back from a body
calculations are based on the bidirectional reflectance distribution function (BRDF), which describes how the reflectance of a given surface depends on
Albedo
Directional-hemispherical reflectance is the integral of the bidirectional reflectance distribution function over all viewing directions. It is sometimes called
Directional-hemispherical reflectance
Directional-hemispherical_reflectance
Principle in optics relating light rays and their reverse rays
affecting the bidirectional reflectance distribution function (BRDF) outcome. If light was measured with a sensor and that light reflected on a material
Helmholtz_reciprocity
illustrations, and include: Cel shading Gooch shading Bidirectional reflectance distribution function Physically based rendering Unbiased rendering Gamma
List of common shading algorithms
List_of_common_shading_algorithms
Fluoropolymer which has the highest diffuse reflectance of any known material
instance, it is used to obtain leaf reflectance[clarification needed] and bidirectional reflectance distribution functions in the laboratory. It can be applied
Spectralon
Bi-hemispherical reflectance is an important part of the Bidirectional reflectance distribution function over all viewing and illumination directions of a hemisphere
Bi-hemispherical_reflectance
reflected by Earth's atmosphere, including studies of tropospheric aerosols, sea surface reflectance, bidirectional reflectance distribution function
POLDER
In geometry, property of being directionally dependent
the brains of the individual. Radiance fields (see Bidirectional reflectance distribution function (BRDF)) from a reflective surface are often not isotropic
Anisotropy
Calculation of energy transfer between media affecting visibility
multiple light interactions. Bidirectional reflectance distribution function (BRDF) The BRDF models how light is reflected on an opaque surface. It is
Light_transport_theory
3D imaging technique
Spatially Varying Bidirectional Distribution Functions (SVBRDF), Bidirectional surface scattering reflectance distribution functions (BSSRDF), and accounting
Photometric_stereo
Producing images of 3D scenes
surface materials reflect light, called reflectance models or (when physically plausible) bidirectional reflectance distribution functions (BRDFs). Rendering
Rendering_(computer_graphics)
Depicting depth with levels of darkness
angle to the camera and material properties (e.g. bidirectional reflectance distribution function) to create a photorealistic effect. Shading is performed
Shading
Theorem in classical electromagnetism
as reversals of each other, without affecting the bidirectional reflectance distribution function (BRDF) outcome. Whereas the above reciprocity theorems
Reciprocity (electromagnetism)
Reciprocity_(electromagnetism)
American engineer
while increasing food supplies. His research into bidirectional reflectance distribution function modeling of reflectors showed potential solar systems
Joshua_Pearce
Topics referred to by the same term
(musician) Fred Nicodemus, a physicist, author of the bidirectional reflectance distribution function John D. Nicodemus (1864–1934), American politician
Nicodemus_(disambiguation)
Determination of light intensities of astronomical bodies
(CBA). Albedo Aperture Photometry Tool - Software Bidirectional reflectance distribution function Hapke parameters Radiometry Redshift survey Spectroscopy
Photometry_(astronomy)
Bright spot of light that appears on shiny objects when illuminated
uniform roughness. List of common shading algorithms Bidirectional reflectance distribution function Specular reflection Diffuse reflection Gamma correction
Specular_highlight
predicting spectral albedo. Albedo Geometric albedo Bidirectional reflectance distribution function P. Helfenstein; et al. (1996). "Galileo Photometry
Hapke_parameters
Shading algorithm in computer graphics
produces more accurate models of empirically determined bidirectional reflectance distribution functions than Phong for many types of surfaces. Blinn-Phong
Blinn–Phong_reflection_model
Equipment used for shape, texture, reflectance and motion capture
used for shape, texture, reflectance and motion capture often with structured light and a multi-camera setup. The reflectance field over a human face was
Light_stage
Name list
footballer Fred Nicodemus, a physicist, author of the bidirectional reflectance distribution function Gospel of Nicodemus, a fourth-century apocryphal gospel
Nicodemus_(given_name)
visibility or collisions). BRDF Bidirectional reflectance distribution functions (BRDFs), empirical models defining 4D functions for surface shading indexed
Glossary_of_computer_graphics
2012 animated film by Rich Moore
release of the film. The film introduced Disney's new bidirectional reflectance distribution functions, with more realistic reflections on surfaces, and new
Wreck-It_Ralph
Computer graphics 3D reference model
harmonic decomposition to encode bidirectional reflectance distribution functions (BRDFs) and directional intensity distributions, allowing for more accurate
Cornell_box
Shading Maestro (previously known as Material Maestro) - bidirectional reflectance distribution function (BRDF), subsurface scattering (SSS), which enable fast
ULTRAY2000
interpolation Bidirectional reflectance distribution function Bidirectional scattering distribution function Bidirectional texture function Bilateral filter
List of computer graphics and descriptive geometry topics
List_of_computer_graphics_and_descriptive_geometry_topics
Chinese American atmospheric and environmental scientist
include scene, cloud in particular, identification, bidirectional reflectance distribution function (BRDF), and narrow-to-broadband conversion. He presented
Zhanqing_Li
Mechanism of light transport
realism deficiency of shadow mapping.[citation needed] Bidirectional scattering distribution function "Finish: Subsurface Light Transport". POV-Ray wiki.
Subsurface_scattering
Computer generation of human images
results also the reflectance field must be captured or an approximation must be picked from the libraries to form a 7D reflectance model of the target
Human_image_synthesis
39th mission of the PSLV space-rocket program
for Electro-Optics Systems. INS-1A carried a Surface Bidirectional Reflectance Distribution Function Radiometer (SBR) and a Single Event Upset Monitor (SEUM)
PSLV-C37
Bicycle and motorcycle dynamics Bidirectional reflectance distribution function Bidirectional scattering distribution function Biefeld–Brown effect Biermann
Index_of_physics_articles_(B)
Algorithm for modelling sequential data
systems, such as generative pre-trained transformers (GPTs) and BERT (bidirectional encoder representations from transformers). For many years, sequence
Transformer_(deep_learning)
Semiconductor light source
Leigh, D. L. (2004). "Very Low-Cost Sensing and Communication Using Bidirectional LEDs". Goins, G. D.; Yorio, N. C.; Sanwo, M. M.; Brown, C. S. (1997)
Light-emitting_diode
Group of rendering algorithms used in 3D computer graphics
be found in. Rendering equation Bias of an estimator Bidirectional scattering distribution function Consistent estimator Unbiased rendering Category:Global
Global_illumination
Probability concept
as the initial distribution of the Markov chain), and A rate matrix Q {\displaystyle Q} on S {\displaystyle S} , that is, a function Q : S 2 → R {\displaystyle
Continuous-time_Markov_chain
Deep learning method
∨⊈⊤⌈≜<math>⊃<math>⟨} </math></math>==== Bidirectional GAN (BiGAN) ==== The standard GAN generator is a function of type G : Ω Z → Ω X {\displaystyle G:\Omega
Generative adversarial network
Generative_adversarial_network
Rendering method
integration of eye-based and light-based rays is often expressed as bidirectional path tracing, in which paths are traced from both the eye and lights
Ray_tracing_(graphics)
American computer graphics professional
the bidirectional scattering distribution function utilizing the light stages his research team constructed to find and capture the reflectance field
Paul_Debevec
Behavioral paradigm in which organisms learn to predict aversive events
fear. Fear conditioning can also involve the hippocampus, which has bidirectional anatomical connections to the amygdala. Consistent with a general role
Fear_conditioning
Technology used to provide broadband to the end consumer via fiber
component may combine and divide optical signals simultaneously, as in bidirectional (duplex) transmission over a single fiber. Passive optical components
Passive_optical_network
Organic chemical that functions both as a hormone and a neurotransmitter
Vinson DA, Zhao S, Bastle RM, Thompson RE, et al. (January 2025). "Bidirectional histone monoaminylation dynamics regulate neural rhythmicity". Nature
Dopamine
3D computer graphics software
of the mesh. One or more bidirectional scattering distribution functions, or BSDFs, can specify if incoming light is reflected, refracted into the mesh
Blender_(software)
Uncontrolled fire in forests or open spaces
outpatient visits: An observational study of smoke exposure periods and a bidirectional case-crossover analysis". PLOS Medicine. 15 (7) e1002601. doi:10.1371/journal
Wildfire
Branch of machine learning
interpretation considers the activation nonlinearity as a cumulative distribution function. The probabilistic interpretation led to the introduction of dropout
Deep_learning
Range of physical processes in physics
scattering cross section (σ), attenuation coefficients, the bidirectional scattering distribution function (BSDF), S-matrices, and mean free path. When radiation
Scattering
Statistical hypothesis test for forecasting
PMID 37840549. Ante, Lennart; Saggu, Aman (2024-01-04). "Time-Varying Bidirectional Causal Relationships between Transaction Fees and Economic Activity
Granger_causality
Computer graphics techniques for reusing samples during rendering
that allows sampling a probability distribution when a function proportional to the probability density function (PDF) is known, a property shared with
Spatiotemporal reservoir resampling
Spatiotemporal_reservoir_resampling
Application of computer graphics to create or contribute to images
modeled as a 7-dimensional bidirectional texture function (BTF) or a collection of bidirectional scattering distribution function (BSDF) over the target's
Computer-generated_imagery
Transmembrane receptors involved in cellular adhesion and signalling
285.5430.1058. PMID 10446050. Hynes RO (September 2002). "Integrins: bidirectional, allosteric signaling machines". Cell. 110 (6): 673–87. doi:10
Integrin
Lung disease involving long-term poor airflow
chronic obstructive pulmonary disease and its common comorbidities using bidirectional Mendelian randomization". European Journal of Medical Research. 29 (1):
Chronic obstructive pulmonary disease
Chronic_obstructive_pulmonary_disease
Type of recurrent dynamical network
λ x + f ( W x ) {\displaystyle {\frac {dx}{dt}}=-\lambda x+f(Wx)} . Bidirectional networks are similar to Hopfield networks, with the special case that
Attractor_network
Scientific study of digital information
time over our channel. Let p(y|x) be the conditional probability distribution function of Y {\textstyle Y} given X {\displaystyle X} . We will consider
Information_theory
Light rail line in Singapore
station opened on 15 June 2007. Damai station opened on 20 June 2011 and bidirectional services commenced on the East Loop. The West Loop began operations
Punggol_LRT_line
Mass murder campaign in Rwanda
et al. (2004). "The Levant versus the Horn of Africa: Evidence for Bidirectional Corridors of Human Migrations". American Journal of Human Genetics.
Rwandan_genocide
Class of transport proteins
of Epithelial Chloride Channel (E-ClC) Family (TC# 1.A.13) catalyze bidirectional transport of chloride ions. Mammals have multiple isoforms (at least
Chloride_channel
Disorder of depression and mood episodes
causing neurodegeneration. Rosenblat and McIntyre (2017) propose a "bidirectional relationship between BD and immune dysfunction," with a variety of possible
Bipolar_disorder
Speakers of Austronesian languages
1200 CE. For a few centuries, the Polynesian islands were connected by bidirectional long-distance sailing, with the exception of Rapa Nui, which had limited
Austronesian_peoples
Cells with a primary function of coloration found in a wide range of animals
PMID 12950730. Schwalm, PA; Starrett, PH; McDiarmid, RW (1977). "Infrared reflectance in leaf-sitting neotropical frogs". Science. 196 (4295): 1225–7. Bibcode:1977Sci
Chromatophore
Dedicated computer system
appliances Computer appliances that are designed to translate data bidirectionally between control systems and enterprise systems. Proprietary, embedded
Computer_appliance
Standard for computer data connections
might work well with a printer, but not with a scanner that requires bidirectional use of the data pins. For a product developer, using USB requires the
USB
Free and open-source object relational database management system
related project is called Postgres-XL. Postgres-R is yet another fork. Bidirectional replication (BDR) is an asynchronous multi-master replication system
PostgreSQL
Abuse of members of the same household
explain women's violence, violence within same-sex relationships and bidirectional abuse. Modern research into the patterns in domestic violence has found
Domestic_violence
Prehistoric migration from Asia to the Americas
been linked to Siberian populations by the distribution of blood types, and in genetic composition as reflected by molecular data, such as DNA. While there
Peopling_of_the_Americas
Genus of theropod dinosaur from the Early Jurassic
lungs, similar to birds and crocodiles, and thereby more oxygen than a bidirectional respiratory system of mammals (wherein the air flows in and out of the
Dilophosaurus
Organelle in eukaryotic cells responsible for respiration
Toll-like receptor 9 and cGAS. Double-stranded RNA (dsRNA), produced due to bidirectional mitochondrial transcription, can activate viral sensing pathways through
Mitochondrion
Gastrointestinal disorder
"The brain–gut pathway in functional gastrointestinal disorders is bidirectional: a 12-year prospective population-based study". Gut. 61 (9). BMJ: 1284–1290
Functional_dyspepsia
List of definitions of terms and concepts used in electrical engineering and electronics
Voltage Direct Current. hybrid coil A kind of transformer used for bidirectional transmission of signals over one pair of wires, for example, as in an
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
Electromagnetic radiation generated by the thermal motion of particles
environments). Reflectivity deviates from the other properties in that it is bidirectional in nature. In other words, this property depends on the direction of
Thermal_radiation
Jewish community associated with modern-day Ethiopia
Herrera, R (2004). "The Levant versus the Horn of Africa: Evidence for Bidirectional Corridors of Human Migrations". The American Journal of Human Genetics
Beta_Israel
List of concepts in artificial intelligence
external device. BCI differs from neuromodulation in that it allows for bidirectional information flow. BCIs are often directed at researching, mapping, assisting
Glossary of artificial intelligence
Glossary_of_artificial_intelligence
Japanese multinational corporation
'nextgeneration telematics system, with interactive communications over a bidirectional wireless infrastructure...all controlled via glove-friendly trackball
Suzuki
Disorder resulting in compulsive behaviors
biomolecular mechanisms to induce ΔFosB in the nucleus accumbens and possess bidirectional cross-sensitization effects that are mediated through ΔFosB. This phenomenon
Addiction
Peptide hormone and neuropeptide
system can enhance or reduce susceptibility to addiction through its bidirectional interaction with numerous systems, including the dopamine system, the
Oxytocin
Cell-cell junction composed of innexins or connexins
can transmit action potentials between neurons. Such synapses create bidirectional continuous-time electrical coupling between neurons. Connexon pairs
Gap_junction
American Secretary of Defense (1961–1968)
aircraft, consolidations that were quite successful, and the success was bidirectional: the Navy would later adopt improvements first made by the Air Force
Robert McNamara as Secretary of Defense
Robert_McNamara_as_Secretary_of_Defense
Brainwaves, repetitive patterns of neural activity in the central nervous system
Time delays play an important role here. Because all brain areas are bidirectionally coupled, these connections between brain areas form feedback loops
Neural_oscillation
Physical effects resulting from activation of the immune system
PMID 10559937. S2CID 37216623. Ashcroft GS (December 1999). "Bidirectional regulation of macrophage function by TGF-beta". Microbes and Infection. 1 (15): 1275–82
Inflammation
Computational problem of graph theory
travel time budget required to arrive on time with a given probability. Bidirectional search – An algorithm that finds the shortest path between two vertices
Shortest_path_problem
Use of fixed routes for routing in networks
routes are removed or have integration with additional protocols such as Bidirectional Forwarding Detection to reduce the time the faulty route is present
Static_routing
German multinational automotive component supplier
the 2016 Automotive News PACE Innovation Partnership Award for the Bidirectional Long Range Communications (BLRC) System, developed by the Body and Security
Continental_AG
drugs of abuse (Volkow et al, 2004). ... Cross-sensitization is also bidirectional, as a history of amphetamine administration facilitates sexual behavior
Treatment and management of addiction
Treatment_and_management_of_addiction
Cushitic ethnic group native to the Horn of Africa
Cruciani et al. 2007 therefore note this as evidence for "a corridor for bidirectional migrations" between Northeast Africa (Egypt and Libya in their data)
Somalis
People of Qatar
migration within the Arabian Peninsula. While there was evidence of bidirectional migration between Qatar and neighboring countries like Saudi Arabia
Qataris
Migrations of Indo-Aryans into the Indian subcontinent
Civilisation are best explained by "a pattern of long-standing, but low-level bidirectional mutual exchange". According to Kennedy, the Cemetery H culture "shows
Indo-Aryan_migrations
Schmidhuber, Jürgen (2005-07-01). "Framewise phoneme classification with bidirectional LSTM and other neural network architectures". Neural Networks. IJCNN
History of artificial neural networks
History_of_artificial_neural_networks
Personality trait
personality traits solely predict well-being and suggests instead a bidirectional relationship. The same study found that neuroticism, while strongly
Extraversion_and_introversion
Non-pathological explanation of mental function variations
The neurodiversity paradigm is a framework for understanding human brain function that considers the diversity within sensory processing, motor abilities
Neurodiversity
Ability to read and write
1111/desc.12080. hdl:11336/23971. PMID 24033575. Lee, Kyunghee (2009). "The Bidirectional Effects of Early Poverty on Children's Reading and Home Environment
Literacy
Computer graphics rendering method using diffuse reflection
essentially the same distribution that a path-tracing program would sample in tracing back one diffuse reflection step; or that a bidirectional ray-tracing program
Radiosity_(computer_graphics)
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
Boy/Male
Indian
Distributor, Divider
Girl/Female
Muslim
Beautiful woman, Distributor, Divider
Boy/Male
Indian
Distributor, Divider
Girl/Female
Indian, Sikh
Distributing Happiness
Girl/Female
Indian
Beautiful woman, Distributor, Divider
Surname or Lastname
English (Yorkshire)
English (Yorkshire) : apparently a habitational name from a lost or unidentified minor place in West Yorkshire, probably in the parish of Halifax, to judge by the distribution of early occurrences of the surname.
Boy/Male
Muslim
Distributor, Divider
Boy/Male
Arabic, British, Islamic, Malaysian, Muslim, Pakistani, Tamil, Urdu
Distribution
Surname or Lastname
English
English : of uncertain origin. Reaney suggests that it may be habitational name from Wincheap Street in Canterbury, but this origin is not supported by the present-day distribution of the surname, which is heavily concentrated in northeastern England.
Girl/Female
Arabic
Distributor
Boy/Male
Muslim
Distributor, Divider
Girl/Female
Indian
Beautiful woman, Distributor, Divider
Surname or Lastname
English (Cambridge)
English (Cambridge) : unexplained; perhaps a habitational name from a lost or unidentified place. There are two places in England called Warland, in Durham and West Yorkshire, but the distribution of the modern surname suggests that a different souce is most probably involved.
Girl/Female
Muslim
Beautiful woman, Distributor, Divider
Boy/Male
Afghan, Arabic, German, Gujarati, Hindu, Indian, Kannada, Muslim, Pashtun, Sindhi
Divider; One who Divides; Distributor
Boy/Male
Muslim/Islamic
Divider distributor
Surname or Lastname
English (Lincolnshire)
English (Lincolnshire) : unexplained. Black identified this as a Scottish name of Pictish origin. However, the modern distribution of the surname, almost exclusively in Lincolnshire and adjoining counties, suggests a more localized eastern English origin.
Surname or Lastname
English (Devon)
English (Devon) : unexplained. Reaney and Wilson suggest that this may be from an Anglo-Scandinavian personal name Tukka, but the distribution in England makes a Scandinavian connection unlikely.
Girl/Female
Indian
Single; Directional; Single Route; One Way
Surname or Lastname
English (Lancashire)
English (Lancashire) : habitational name from a place so called, perhaps Forshaw Heath in Solihull, Warwickshire, although the modern distribution is much further north.
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
Boy/Male
Irish
Hound of Ulster.
Girl/Female
Indian, Kashmiri
Violet
Boy/Male
Indian, Punjabi, Sikh
Kind Love
Boy/Male
Arabic, Muslim, Sindhi
Narrator of Hadith
Boy/Male
Indian, Punjabi, Sikh
Religious Divine Knowledge
Girl/Female
Hindu
Boy/Male
English
From the thom tree.
Girl/Female
Australian, British, English
Friend of Peace
Boy/Male
Biblical
Father of changing.
Girl/Female
Australian, Romanian
Priceless
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
BIDIRECTIONAL REFLECTANCE-DISTRIBUTION-FUNCTION
n.
The steps or operations by which steam is supplied to and withdrawn from the cylinder at each stroke of the piston; viz., admission, suppression or cutting off, release or exhaust, and compression of exhaust steam prior to the next admission.
n.
A distributive adjective or pronoun; also, a distributive numeral.
a.
Expressing separation; denoting a taking singly, not collectively; as, a distributive adjective or pronoun, such as each, either, every; a distributive numeral, as (Latin) bini (two by two).
n.
Unwillingness; reluctance.
a.
Indicating division or distribution.
v. i.
To make distribution.
n.
Distribution; dealing; apportionment.
n.
Repugnance; resistance; reluctance.
n.
The geographical distribution of plants.
n.
Disposition; distribution; management.
n.
Separation into parts or classes; arrangement of anything into parts; disposition; classification.
n.
Distribution; division into shares.
n.
Distribution; apportionment.
n.
The act of distributing or dispensing; the act of dividing or apportioning among several or many; apportionment; as, the distribution of an estate among heirs or children.
adv.
By distribution; singly; not collectively; in a distributive manner.
a.
Of or pertaining to distribution.
n.
The sorting of types and placing them in their proper boxes in the cases.
n.
That which is distributed.
adv.
Readily; without reluctance; willingly.
n.
A resolving a whole into its parts.