Benjamin Segovia




Personal Information

E-Mail: segovia.benjamin@gmail.com
Phone Number: +33426234448
Address: Bat. 710 "le Nautibus", Université Claude Bernard Lyon 1 43, boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France

After three years of pleasant and peacul academic researches about rendering techniques, Monte-Carlo methods, ray tracing and rasterization strategies, I decided to work for the video game industry.

This page is therefore dedicated to the work I did during the three years of my Ph.D. thesis. You will find here my Ph.D. thesis, the academic articles I wrote and the main project of this thesis, yaCORT, an interactive coherent ray tracer which implements several Monte-Carlo rendering algorithms: Instant Radiosity, Bidirectional Instant Radiosity, Metropolis Instant Radiosity and Multiple-Try Metropolis Light Transport.

By the way, we may also be interested by my recently opened blog at Bouliiii's Blog

Ph.D. Thesis

You can find my Ph.D. thesis, "Interactive Light Transport with Virtual Point Lights", here.

Current Projects

YACORT
GPL Implementation of the OpenRT API

Acoustic Material Characterization with a MCMC sampler with Christophe Heinkele
The goal of this mini-project was to find the laws of uncertain material parameters when you try to find its acoustic properties. Basically, when you make an experiment, you try to determine the response A of a material in function of the frequency omega. Unfortunately, many parameters are uncertain and A = F(w) is "not constant" and depends on a set of uncertain parameters X (which includes w). Therefore, A = f(X) where X is an unknown random variable, A is another random variable with a law p given by the experiments and f is the physical model you choose for the phenomena. Our goal is to find the law of X such that the law of f(X) is the law of A (which is p). To solve this inverse problem, we propose to use a MCMC sampler to directly sample X and therefore to compute its density with a final non-parameteric estimation pass.

Publications

Coherent Metropolis Light Transport with Multiple-Try Mutations
Benjamin Segovia, Jean-Claude Iehl , Bernard Péroche
LIRIS Technical Report #RR-LIRIS-2007-015
Metropolis Instant Radiosity
Benjamin Segovia, Jean-Claude Iehl , Bernard Péroche
Proceedings of Eurographics 2007
Bidirectional Instant Radiosity
Benjamin Segovia, Jean-Claude Iehl , Richard Mitanchey and Bernard Péroche
Proceedings of the 17th Eurographics Workshop on Rendering
Non-interleaved Deferred Shading of Interleaved Sample Patterns
Benjamin Segovia, Jean-Claude Iehl , Richard Mitanchey and Bernard Péroche
Proceedings of SIGGRAPH/Eurographics Workshop on Graphics Hardware 2006
GNU RT: vers une mise en oeuvre GPL d'OpenRT
Benjamin Segovia, Jean-Claude Iehl , Bernard Péroche
Revues Francophones de l'informatique graphique 2006 (in French)

Benjamin Segovia