Jeppe Revall Frisvad

Jeppe Revall Frisvad

Associate Professor in Computer Graphics, M.Sc.(Eng.), Ph.D.
Visual Computing
DTU Compute
Technical University of Denmark
Contact information

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Publications
Teaching
Code Packages
Press Appearances

Research Projects

PRIME: Predictive Rendering In Manufacture and Engineering [2020-2024]
Beneficiary. Innovative Training Network (ITN) funded by EU Horizon 2020.

BxDiff: New Quantities for the Measurement of Appearance [2019-2022]
External funded partner. EURAMET EMPIR joint research project (JRP) co-funded by EU Horizon 2020 and participating states.

ApPEARS: Appearance Printing - European Advanced Research School [2019-2023]
Beneficiary. Innovative Training Network (ITN) funded by EU Horizon 2020.

Virtual Reality-Based Visualization of Geometric Data [2018-2022]
Participant. Project funded by Advokat Bent Thorbergs Fond.

Eco3D: The Cyber-Physical 3D Ecosystem [2014-ongoing]
Co-founder. Framework for exploiting synergies within our Section for Visual Computing.

Recent and Upcoming Publications

with journal papers highlighted by a background color.

Tools for virtual reality visualization of highly detailed meshes
Mark Bo Jensen, Egill Ingi Jacobsen, Jeppe Revall Frisvad, Andreas Bærentzen
The Gap between Visualization Research and Visualization Software (VisGap 2021). June 2021. To appear.
Surface reconstruction from structured light images using differentiable rendering
Janus Nørtoft Jensen, Morten Hannemose, Andreas Bærentzen, Jakob Wilm, Jeppe Revall Frisvad, Anders Bjorholm Dahl
Sensors 21(4), Article 1068. February 2021.
Fundamental scattering quantities for the determination of reflectance and transmittance
Alejandro Ferrero, Jeppe Revall Frisvad, Lionel Simonot, Pablo Santafé, Alfred Schirmacher, Joaquin Campos, Mathieu Hebert
Optics Express 29(1), pp. 219-231. January 2021.
Alignment of rendered images with photographs for testing appearance models
Morten Hannemose, Mads Emil Brix Doest, Andrea Luongo, Søren Kimmer Schou Gregersen, Jakob Wilm, Jeppe Revall Frisvad
Applied Optics 59(31), pp. 9786-9798. November 2020. [lowres pdf]
Computing the bidirectional scattering of a microstructure using scalar diffraction theory and path tracing
Viggo Falster, Adrian Jarabo, Jeppe Revall Frisvad
Computer Graphics Forum (PG 2020) 39(7), pp. 231-242. October 2020.
[lowres pdf] [videos: supplement, presentation] [slides]
Surface discretisation effects on 3D printed surface appearance
Alina Pranovich, Sasan Gooran, Jeppe Revall Frisvad, Daniel Nyström
Proceedings of Colour and Visual Computing Symposium (CVCS 2020). CEUR Workshop Proceedings, Vol. 2688. September 2020.
Survey of models for acquiring the optical properties of translucent materials
Jeppe Revall Frisvad, Søren Alkærsig Jensen, Jonas Skovlund Madsen, António Correia, Li Yang, Søren Kimmer Schou Gregersen, Youri Meuret, Poul-Erik Hansen
Computer Graphics Forum (EG 2020) 39(2), pp. 729-755. May 2020. [webpage] [OpenAccess]
Microstructure control in 3D printing with digital light processing
Andrea Luongo, Viggo Falster, Mads Brix Doest, Macarena Mendez Ribo, Eythor Runar Eiriksson, David Bue Pedersen, Jeppe Revall Frisvad
Computer Graphics Forum 39(1), pp. 347-359. February 2020. [lowres pdf]
Measurement of polymers with 3D optical scanners: evaluation of the subsurface scattering effect through five miniature step gauges
Maria Grazia Guerra, Søren Schou Gregersen, Jeppe Revall Frisvad, Leonardo De Chiffre, Fulvio Lavecchia, Luigi Maria Galantucci
Measurement Science and Technology 31(1), Article 015010. January 2020.

Courses

02941 Physically Based Rendering and Material Appearance Modelling (since spring 2016)
Course responsible and course designer. PhD course.

02562 Rendering - Introduction (since Autumn 2011)
Course responsible.

02561 Computer Graphics (since Autumn 2015)
Course responsible.

Professional Activities

EGSR 2021 (program committee member)
EGSR 2020 (program committee member)

Eurographics 2020 (tutorials co-chair)
Eurographics 2015 (short papers international program committee member)

3DV 2018 Tutorial: Methods for photographic radiometry, modeling of light transport and material appearance (organizer and presenter)

ICCV 2017 Workshop: Data-Driven BxDF Models for Computer Vision Applications (chair and organizer)

Vision Day 2018 (session organizer)
Vision Day 2017 (conference chair)
Vision Day 2015 (session organizer)
Vision Day 2014 (conference chair)
Vision Day 2013 (session organizer)

Graphical Vision Day 2011 (program committee member)
Graphical Vision Day 2010 (co-chair)
Graphical Vision Day 2009 (co-chair)

ISVD 2011 (scientific committee member)
ISVD 2009 (program committee member)

Reviewer for ACM SIGGRAPH, ACM Transactions on Graphics, Optical Society of America (AO, OE, JOSA A), Computer Graphics Forum.

Member of ACM SIGGRAPH and Eurographics Association.

Code News

May 2019
WebGL demonstrator of my procedural model for simulating pupillary hippus.
This model was published in a paper at Eurographics 2009, and it produces interesting dynamic effects for glare simulation.
The webpage includes a Matlab implementation of the model.

April 2018
Matlab code (inhLMabs) implementing a variation of the Lorenz-Mie theory for calculating the phase function of a spherical particle.
This variation includes the case where the particle scatters an inhomogeneous wave, which is the usual case in an absorbing medium.
The code accompanies an article in Journal of the Optical Society of America A.

March 2018
WebGL demonstrator for visualizing the phase function of spherical particles.
This demo visualizes the phase function given by the Lorenz-Mie theory and implemented using a paper from SIGGRAPH 2007.
I include a new technique for calculating the phase function of a spherical particle that scatters an inhomogeneous electromagnetic plane wave.

June 2017
Rendering Framework has been updated for the course 02941 Physically Based Rendering and Material Appearance Modelling.

March 2017
WebGL example updated to include recent improvements of my onb model by other authors.

October 2016
WebGL demonstrator for exploring noise functions. [Not working in Internet Explorer.]
This demo illustrates the qualities of sparse convolution noise as presented in my paper from GRAPHITE 2007,
but here implemented as a GLSL ES function.

January 2016
Rendering Framework has been updated for the course 02941 Physically Based Rendering.

December 2014
WebGL example of my onb method. It is here used to generate a consistently oriented tangent space.

November 2014
WebGL examples developed for the course 02560 Web Graphics and Scientific Visualization.
See the links in the section called Lecture Examples.

October 2014
WebGL example of our directional dipole for subsurface scattering is now available.
It accompanies the abstract of our paper to appear in ACM Transactions on Graphics.

June 2014
dirpole code has been released.
This is a simplistic example implementation of our directional dipole model for subsurface scattering.
It accompanies a publication to appear in ACM Transactions on Graphics.

June 2013
LMabs code has been published in a Matlab version.
This is code for computing the scattering properties of participating media using Lorenz-Mie theory.
It accompanies a publication that appeared in ACM Transactions on Graphics (SIGGRAPH 2007).

Lorenz-Mie Theory: Translation Project

There has been much discussion and many misunderstandings about the work of the remarkable Danish scientist Ludvig Lorenz (1821-1891) on the theory of light scattering of a plane wave by a spherical particle. This theory is often referred to as Mie theory. In "The Scattering of Light and other electromagnetic radiation", Academic Press, 1969, Kerker presents a historical investigation of the origins of the theory and concludes:

It is not the intention of this author to arbitrate the questions of priority raised here nor to identify the theory of scattering by a sphere with any one man's name. Indeed, coincident and consecutive discoveries are common occurrences in science. But certainly if this theory is to be associated with the name or names of individuals, at least that of Lorenz, in whose paper are to be found the practical formulas so commonly used today, should not be omitted.

Nevertheless, some authors prefer to call it Mie theory rather than Lorenz-Mie theory. Perhaps because of the widespread supposition that Lorenz's theory relies on the existence of an ether. Reading the first pages of Lorenz's article, it is clear that this is certainly not true (see the translation below). Lorenz explicitly states that light propagation is like the laws for transmission of electricity and elastic forces, although it differs from the theory of elasticity in ruling out the possibility of longitudinal oscillations. Lorenz is thus working with transversal waves just like Maxwell and Mie. To uphold the recommendation that the theory of scattering of a plane wave by a spherical particle should continue to be called Lorenz-Mie theory, I decided to work on a translation of Lorenz's pioneering article from 1890.

My time available for working on this project has been very limited, and the project was on hold from 2011 to 2018. Helge Kragh then stepped in to revive the project and help complete it. This led to significant progress, so that there is now a complete first draft of the translation. The original article is:

Lorenz, L. Lysbevægelser i og uden for en af plane Lysbølger belyst Kugle. Det kongelige danske Videnskabernes Selskabs Skrifter, 6. Række, naturvidenskabelig og mathematisk Afdeling VI. 1-62. 1890. [lowres pdf]

The original article is 62 pages (one blank). The translation follows the original page numbering, and the pdf is available for download here:

Lorenz, L. Light propagation in and outside a sphere illuminated by plane waves of light. Det kongelige danske Videnskabernes Selskabs Skrifter 6(6), pp. 1-62. 1890. Translated by Jeppe Revall Frisvad and Helge Kragh, 2019.

In an old Danish Biographical Encyclopedia, the following interesting paragraph about this article appears. Translated from Danish:

Lorenz's work on the Theory of Colour Dispersion (Videnskab. Selsk. Skrifter 6. R. II, 1883) is particularly important as it is the outset of his solution of the old famous rainbow problem. The outlines of the rainbow theory are given by Descartes and Newton, more completely by Airy, who explained the supernumerary arcs by light interference. But, while one had previously limited oneself significantly to determining the directions in which these arcs appear, Lorenz set himself the goal to determine the light intensity completely in all directions on the basis of the theory of light. To complete this task, Lorenz worked almost continuously for several years; the dissertation is available in Videnskab. Selsk. Skrifter 6. R. VI (1890).