Publications related to Photon mapping

Multilayer four-flux matrix model accounting for directional-diffuse light transfers

The four-flux model is a method to solve light radiative-transfer problems in planar, possibly multilayer structures. The light fluxes are modeled as two collimated and two diffuse beams propagating forward and backward perpendicularly to the layer stack. ...

Optical Soc Amer2016

Accurate recovery of a specularity from a few samples of the reflectance function

Martin Vetterli, Ivan Dokmanic, Loïc Arnaud Baboulaz, Gilles Baechler

We present a new technique for estimating the specular peak of the bidirectional reflectance distribution function (BRDF) based on finite rate of innovation (FRI) sampling. The specular component of the BRDF varies rapidly, so it is challenging to acquire ...

Ieee2016

Device for Determining a Bidirectional Reflectance Distribution Function of a Subject

Martin Vetterli, Loïc Arnaud Baboulaz, Gaël Georges Soudan

The present invention relates to a device (10) for determining a bidirectional reflectance distribution function of a subject (S) comprising: a light source (LS) for producing an incident light (li) and directing said incident light (li) onto a subject (S) ...

2016

High-contrast Computational Caustic Design

Mark Pauly, Andrea Tagliasacchi, Yuliy Gennadievich Schwartzburg, Romain Pierre Testuz

We present a new algorithm for computational caustic design. Our algorithm solves for the shape of a transparent object such that the refracted light paints a desired caustic image on a receiver screen. We introduce an optimal transport formulation to esta ...

ACM2014

Retrieval of vertical particle concentration profiles by optical remote sensing: a model study

Alfred Johny Wüest

Water-leaving radiance is subject to depth variability of the water constituents. The optical penetration depth is strongly dependent on the wavelength λ, which allows to retrieve a non-uniform vertical profile of an optically-active constituent CTSM(z) fr ...

Optical Society of America2014

Mixed-Dimensionality Approach for Advanced Ray Tracing of Lamellar Structures for Daylighting and Thermal Control

Jean-Louis Scartezzini, Andreas Schueler, André Gabriel Kostro

The appropriate choice of the type of glazing and glazed area in a façade depends on many factors. They include amongst other criteria: location, orientation, climatic condition, energetic efficiency, usage of the building, required user comfort, and the a ...

EPFL Solar Energy and Building Physics Laboratory (LESO-PB)2013

Revisiting parallel catadioptric goniophotometers

Marilyne Andersen, Boris Clément Karamata

A thorough knowledge of the angular distribution of light scattered by an illuminated surface under different angles is essential in numerous industrial and research applications. Traditionally, the angular distribution of a reflected or transmitted light ...

Spie-Int Soc Optical Engineering2013

Coherent perfect absorption mediated anomalous reflection and refraction

Olivier Martin, Shourya Dutta Gupta

We show bending of light on the same side of the normal in a free-standing corrugated metal film under bidirectional illumination. Coherent perfect absorption (CPA) is exploited to suppress the specular zeroth order leading to effective back-bending of lig ...

Optical Soc Amer2012

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Photon mapping

Multilayer four-flux matrix model accounting for directional-diffuse light transfers

Accurate recovery of a specularity from a few samples of the reflectance function

Optical Thickness Measurements of Vacuum Ultraviolet Radiation in the X2 Expansion Tube

Device for Determining a Bidirectional Reflectance Distribution Function of a Subject

High-contrast Computational Caustic Design

Retrieval of vertical particle concentration profiles by optical remote sensing: a model study

Mixed-Dimensionality Approach for Advanced Ray Tracing of Lamellar Structures for Daylighting and Thermal Control

Rate-distortion analysis of multiview coding in a DIBR framework

Revisiting parallel catadioptric goniophotometers

Coherent perfect absorption mediated anomalous reflection and refraction

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Chat with Graph Search

Retrieval of vertical particle concentration profiles by optical remote sensing: a model study

Device for Determining a Bidirectional Reflectance Distribution Function of a Subject

Rate-distortion analysis of multiview coding in a DIBR framework

Coherent perfect absorption mediated anomalous reflection and refraction

Optical Thickness Measurements of Vacuum Ultraviolet Radiation in the X2 Expansion Tube

Accurate recovery of a specularity from a few samples of the reflectance function

Multilayer four-flux matrix model accounting for directional-diffuse light transfers

Revisiting parallel catadioptric goniophotometers

High-contrast Computational Caustic Design

Mixed-Dimensionality Approach for Advanced Ray Tracing of Lamellar Structures for Daylighting and Thermal Control