For a complete and up-to-date list of publications, follow this link to all research papers.

Below you will find a collection of selected work that you may also browse by research project.

 

Material properties

Last modified on 2017-09-18 08:55:40 GMT. 0 comments. Top.

MOTIVATION: Provide models of material appearance, as well as methods to edit and process measured materials, relying either on physical or perceptual considerations. INSPIRATION: Koenderink and Pont analytic papers on various types of materials, Marchner et al. BRDF models, Burley’s artistic approach to material appearance.
The Perception of Hazy Gloss
Peter Vangorp, Pascal Barla, Roland Fleming.
Journal of Vision 2017, Volume 17, issue 5.
ArchivePaperHtml
A Practical Extension to Microfacet Theory for the Modeling of Varying Iridescence
Laurent Belcour, Pascal Barla.
ACM Transactions on Graphics (proceedings of Siggraph), 2017.

ArchivePaperVideoCode Project
Multi-Scale Rendering of Scratched Materials using a Structured SV-BRDF Model
Boris Raymond, Gaël Guennebaud, Pascal Barla.
ACM Transactions on Graphics (proceedings of Siggraph), 2016
.
ArchivePaperVideo


Motion flows

Last modified on 2017-09-18 08:54:48 GMT. 0 comments. Top.

MOTIVATION: Understand how motion in 3D induces motion in images (acretions, deletions, compressions, dilations, etc). Useful for stylization purposes, layout enhancement, and probably much more.

INSPIRATION: Bousseau et al. work on watercolorisation of videos. Gibson’s book “The Ecological Approach to Visual Perception”.

Specular Motion and 3D Shape Estimation
Dicle N. Dövencioğlu, Ohad Ben-Shahar, Pascal Barla, Katja Doerschner
Journal of Vision 2017, Volume 17, Issue 6
ArchivepaperHtml
hippo5 Dynamic 2D Patterns for Shading 3D Scenes,
Simon Breslav; Karol Szerszen; Lee Markosian; Pascal Barla; Joëlle Thollot,
ACM Transactions on Graphics, 2007
Archivepapervideolibrary
cezanne_pointillist Dynamic point distribution for stroke-based rendering
David Vanderhaeghe; Pascal Barla; Joëlle Thollot; François X. Sillion
Eurogaphics Symposium on Rendering, Jun 2007
Archivepapervideo


2D animation

Last modified on 2017-05-11 08:22:24 GMT. 0 comments. Top.

MOTIVATION: Assist in the creation of in-betweens from a set of keyframe poses (image, drawing, etc). Suggest correspondences, derive mappings and let users control the interpolation process. INSPIRATION: Alexa et al. as-rigid-as-possible interpolation. Sykora et al. various techniques for 2D animation. Richard William’s book “The Animator Survival Kit”.
Example-based Expressive Animation of 2D Rigid Bodies
Marek Dvorožňák, Pierre Bénard, Pascal Barla, Oliver Wang, Daniel Sýkora
ACM Transactions on Graphics, Proceedings of Siggraph – 2017
Archivepapervideo
face-interpolations N-way morphing for 2D Animation,
William Baxter, Pascal Barla, Ken-ichi Anjyo,
Computer Animation and Virtual Worlds (Proceedings of CASA), Volume 20, Number 2 – 2009
Archive  –  paper  –  video
arachno0Match Compatible Embedding for 2D Shape Animation,
William Baxter, Pascal Barla, Ken-ichi Anjyo,
IEEE Transactions on Visualization and Computer Graphics, Volume 99, Number 2 – sep-oct 200
9
Archive  –  paper  – video
 cats Rigid Shape Interpolation Using Normal Equations,
William Baxter, Pascal Barla, Ken-ichi Anjyo,
Proceedings of the 6th international symposium on Non-photorealistic animation and rendering– June 2008
Archive  –  paper  –  video 

 

Image features

Last modified on 2016-07-11 08:00:25 GMT. 0 comments. Top.

MOTIVATION: Extract features (contours, lines, junctions) from arbitrary images at multiple scales. Applied to image manipulation, sketch reconstruction, color filtering, etc. INSPIRATION: The Scale-Space litterature and use of Gaussian Derivatives. Adelson et al work on steerable filters and image pyramids. Zucker et al. work on folds and flows.
FGfrog Flow-guided Warping for Image-based Shape Manipulation
Romain Vergne, Pascal Barla, Georges-Pierre Bonneau, Roland Fleming.
ACM Transactions on Graphics (proceedings of Siggraph), 2016
.
Archive  –  Paper  – VideoApp
teaser_mix2 Non-oriented MLS Gradient Fields.
Jiazhou Chen, Gaël Guennebaud, Pascal Barla, Xavier Granier.
Computer Graphics Forum, 2013.
ArchivePaperVideoLibrary
bee_mask Structure-preserving manipulation of photographs,
Alexandrina Orzan, Adrien Bousseau, Pascal Barla, Joëlle Thollot,
International Symposium on Non-Photorealistic Animation and Rendering – aug 2007
Archive  –  Paper


Expressive Shading

Last modified on 2017-02-08 07:24:30 GMT. 0 comments. Top.

MOTIVATION: Design techniques that manipulate appearance due to material & lighting at once. Preserve stylistic choices as well as directional and/or spatial appearance variations. INSPIRATION: Sloan et al. LitSphere and its adaptations in ZBrush, MatCaps. Fleming et al. perceptual experiments on material perception. Hogarth’s book “Dynamic Light and Shade”.
Local Shape Editing at the Compositing Stage
Carlos Jorge Zubiaga Peña, Gael Guennebaud, Romain Vergne, Pascal Barla
EGSR 2016: Proceedings of the Euroographics Symposium on Rendering (EI&I track)
Archive paper video
DynMatCaps MatCap Decomposition for Dynamic Appearance Manipulation
Carlos Jorge Zubiaga, Adolfo Muñoz, Laurent Belcour, Carles Bosch and Pascal Barla
EGSR 2015: Proceedings of  the Euroographics Symposium on Rendering (EI&I track)
Archive paper video demo video
DS2P Dynamic Stylized Shading Primitives,
David Vanderhaeghe, Romain Vergne, Pascal Barla, William Baxter,
NPAR’11: Proc. symposium on Non-Photorealisatic Animation and Rendering
Archive  –  paper  –  demo video  –  gallery video
minimal1 Apparent relief: a shape descriptor for stylized shading,
Romain Vergne, Pascal Barla, Xavier Granier, Christophe Schlick,
Proceedings of the 6th international symposium on Non-photorealistic animation and rendering, 2008
Archive  –  paper  –  video
landscape_aerial4 X-Toon: An extended toon shader,
Pascal Barla; Joëlle Thollot; Lee Markosian,
International Symposium on Non-Photorealistic Animation and Rendering (NPAR), 2006
Archive  – paper –  videoplugin 

 

 

Radiance Tweaking

Last modified on 2015-07-06 16:37:41 GMT. 0 comments. Top.

MOTIVATION: Understand interactions between illumination, shape and materials with a differential analysis. Enhance, manipulate and efficiently render 3D scenes in global illumination settings. INSPIRATION: Koenderink et al. analysis of highlights produced by different materials. Ramamoorthi et al. first-order analysis of the rendering equation. Fleming et al. perceptual experiments on shape-from-reflections.
 gi_edit_2 Optimizing BRDF Orientations for the Manipulation of Anisotropic Highlights
Boris Raymond; Gaël Guennebaud; Pascal Barla; Romain Pacanowski; Xavier Granier
Proceedings of Eurographics 2014
Archive  –  paper  –  video
 dragon-comb-lw-rs Improving Shape Depiction under Arbitrary Rendering,
Romain Vergne, Romain Pacanowski, Pascal Barla, Xavier Granier, Christophe Schlick,
IEEE Transactions on Visualization and Computer Graphics – August 2011
Archive  –  paper
armadillo-prefiltered-mix Radiance Scaling for Versatile Surface Enhancement,
Romain Vergne, Romain Pacanowski, Pascal Barla, Xavier Granier, Christophe Schlick,
I3D ‘10: Proc. symposium on Interactive 3D graphics and games – 2010
Archive  – paper  –  video plugin
lucy_warped Light Warping for Enhanced Surface Depiction,
Romain Vergne, Romain Pacanowski, Pascal Barla, Xavier Granier, Christophe Schlick,
ACM Transaction on Graphics (Proceedings of SIGGRAPH 2009), Volume 28, Number 3 – Aug 2009
Archive  –  paper  – video


Digital painting

Last modified on 2015-07-06 16:41:55 GMT. 0 comments. Top.

MOTIVATION: Provide painting tools that quickly produce color gradients, highlights, texture and reflection patterns. Ease and speed up the creation process in vector and/or raster graphics, leverage artistic skills. INSPIRATION: Elder et al. image reconstruction from its luminance edges. Jeschke et al. various extensions to Diffusion Curves. Gombrich’s book “Art and Illusion”
SurfaceFlows_Brush Surface Flows for Image-Based Shading Design,
Romain Vergne, Pascal Barla, Xavier Granier, Roland Fleming,
ACM Transactions on Graphics (Proceedings of Siggraph 2012).
Archive  –  paper  –  suppmat  –  video  – demo video 
Nekko A Vectorial Solver for Free-form Vector Gradient
Simon Boyé, Pascal Barla, Gael Guennebaud.
Transaction on Graphics, ACM, 2012, Proceedings of Siggraph Asia 2012.
Archive  –  paper  –  video  –  webGL demo library
 zephir_result Diffusion Curves: A Vector Representation for Smooth-Shaded Images,
Alexandrina Orzan, Adrien Bousseau, Holger Winnemöller, Pascal Barla, Joëlle Thollot, David Salesin,
ACM Transaction on Graphics (Proceedings of SIGGRAPH 2008), Volume 27, Number 3 – 2008
Archive  –  paper  –  video  –  win32 demo

 

Surface features

Last modified on 2016-05-22 16:54:49 GMT. 0 comments. Top.

MOTIVATION: Extract features (bumps, ridges, valleys, inflections) from arbitrary surfaces at multiple scales. Applied to line-based rendering, illustrative shading, 3D shape editing, etc. INSPIRATION: Guennebaud et al work on Algebraic Point Set Surfaces. Koenderink et al work on solid shape invariants.
 c103-f103_3-a48-representative_image-v1 Screen-Space Curvature for Production-Quality Rendering and Compositing.
Nicolas Mellado, Pascal Barla, Gaël Guennebaud, Patrick Reuter, Gregory Duquesne.
Siggraph Talk program, 2013.
Archive –  paper  – videoplugin
pertinentArmadillo Growing Least Squares for the Continuous Analysis of Manifolds in Scale-Space.
Nicolas Mellado, Pascal Barla, Gaël Guennebaud, Patrick Reuter, Christophe Schlick. 
Computer Graphics Forum, Proceedings of Symposium on Geometry Processing 2012.
Archive  –  paper  –  library
teaser-isis2-all Surface Relief Analysis for Illustrative Shading.
Ammann Lucas, Pascal Barla, Xavier Granier, Gael Guennebaud, Patrick Reuter.
Computer Graphics  Forum, Wiley, 2012, 31 (4)
Archive  –  paper  –  video
horsecol-4 Implicit Brushes for Stylized Line-based Rendering,
Romain Vergne, David Vanderhaeghe, Jiazhou Chen, Pascal Barla, Xavier Granier, Christophe Schlick,
Computer Graphics Forum 30, 2 (proceedings of Eurographics 2011)
Archivepapervideo


Procedural drawing

Last modified on 2014-02-07 12:36:27 GMT. 0 comments. Top.

MOTIVATION: Automate the production of drawing patterns composed of many simple elements. Derive the procedure from scratch or from an example, correlate to underlying image features when available. INSPIRATION: Ostromoukhov et al. & Hurtut et al. example-based techniques. Grabli et al. & Loi et al. procedural drawing systems. Zaidi et al. perceptual experiments on shape-from-textures.
2d_scaled_circles_synth_r1_result_cliped Stroke Pattern Analysis and Synthesis
Pascal Barla; Simon Breslav; Joëlle Thollot; François X. Sillion; Lee Markosian
Proc. of Eurographics 2006 : Computer Graphics Forum, Sep 2006
Archivepaper
0image_thumbnail_final Geometric Clustering for Line Drawing Simplification
Pascal Barla; Joëlle Thollot; François X. Sillion
Proceedings of the Eurographics Symposium on Rendering, Jun 2005
Archivepapervideo