VMV11

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/1015

Surface Flow from Visual Cues

[meta data] [files:
001-008.pdf
]
Petit, Benjamin
; 
Letouzey, Antoine
; 
Boyer, Edmond
; 
Franco, Jean-Sébastien

A Global Optimization Approach to High-detail Reconstruction of the Head

[meta data] [files:
009-015.pdf
]
Schneider, David C.
; 
Kettern, Markus
; 
Hilsmann, Anna
; 
Eisert, Peter

FreeCam: A Hybrid Camera System for Interactive Free-Viewpoint Video

[meta data] [files:
017-024.pdf
]
Kuster, Claudia
; 
Popa, Tiberiu
; 
Zach, Christopher
; 
Gotsman, Craig
; 
Gross, Markus

Pose Correction by Space-Time Integration

[meta data] [files:
033-040.pdf
]
Esturo, Janick Martinez
; 
Rössl, Christian
; 
Fröhlich, Stefan
; 
Botsch, Mario
; 
Theisel, Holger

Partial Symmetry Detection in Volume Data

[meta data] [files:
041-048.pdf
]
Kerber, Jens
; 
Wand, Michael
; 
Krüger, Jens
; 
Seidel, Hans-Peter

Depth Driven Photometric and Geometric Image Registration for Real-Time Stereo Systems

[meta data] [files:
025-032.pdf
]
Waizenegger, Wolfgang
; 
Feldmann, Ingo
; 
Eisert, Peter

Simulating Deep Sea Underwater Images Using Physical Models for Light Attenuation, Scattering, and Refraction

[meta data] [files:
049-056.pdf
]
Sedlazeck, Anne
; 
Koch, Reinhard

RITK: The Range Imaging Toolkit - A Framework for 3-D Range Image Stream Processing

[meta data] [files:
057-064.pdf
]
Wasza, Jakob
; 
Bauer, Sebastian
; 
Haase, Sven
; 
Schmid, Moritz
; 
Reichert, Sebastian
; 
Hornegger, Joachim

Object-aware Gradient-Domain Image Compositing

[meta data] [files:
065-071.pdf
]
Eisemann, Martin
; 
Kokemüller, Jan
; 
Magnor, Marcus

Smooth Transitions for Large Scale Changes in Multi-Resolution Images

[meta data] [files:
081-087.pdf
]
Lancelle, Marcel
; 
Fellner, Dieter W.

Warp-based Near-Regular Texture Analysis for Image-based Texture Overlay

[meta data] [files:
073-080.pdf
]
Hilsmann, Anna
; 
Schneider, David C.
; 
Eisert, Peter

Near-Regular Texture Synthesis by Random Sampling and Gap Filling

[meta data] [files:
089-096.pdf
]
Recas, Diego Lopez
; 
Hilsmann, Anna
; 
Eisert, Peter

SBL Mesh Filter: A Fast Separable Approximation of Bilateral Mesh Filtering

[meta data] [files:
097-103.pdf
]
Vialaneix, Guillaume
; 
Boubekeur, Tamy

Surface Reconstruction from Multi-resolution Sample Points

[meta data] [files:
105-112.pdf
]
Mücke, Patrick
; 
Klowsky, Ronny
; 
Goesele, Michael

Koiter's Thin Shells on Catmull-Clark Limit Surfaces

[meta data] [files:
113-120.pdf
]
Wawrzinek, Anna
; 
Hildebrandt, Klaus
; 
Polthier, Konrad

AVDT - Automatic Visualization of Descriptive Texts

[meta data] [files:
129-136.pdf
]
Spika, Christian
; 
Schwarz, Katharina
; 
Dammertz, Holger
; 
Lensch, Hendrik P. A.

A Cluster Hierarchy-based Volume Rendering Approach for Interactive Visual Exploration of Multi-variate Volume Data

[meta data] [files:
137-144.pdf
]
Dobrev, Petar
; 
Long, Tran Van
; 
Linsen, Lars

Fast and Efficient 3D Chamfer Distance Transform for Polygonal Meshes

[meta data] [files:
121-128.pdf
]
Martinek, Michael
; 
Grosso, Roberto
; 
Greiner, Günther

Extracting Flow Structures Using Sparse Particles

[meta data] [files:
153-160.pdf
]
Agranovsky, Alexy
; 
Garth, Christoph
; 
Joy, Kenneth I.

Particle-Based Anisotropic Sampling for Two-Dimensional Tensor Field Visualization

[meta data] [files:
145-152.pdf
]
Kratz, Andrea
; 
Kettlitz, Nino
; 
Hotz, Ingrid

Real-time Rendering of Stack-based Terrains

[meta data] [files:
161-168.pdf
]
Löffler, Falko
; 
Müller, Andreas
; 
Schumann, Heidrun

Bent Normals and Cones in Screen-space

[meta data] [files:
177-182.pdf
]
Klehm, Oliver
; 
Ritschel, Tobias
; 
Eisemann, Elmar
; 
Seidel, Hans-Peter

Adaptive Level-of-Precision for GPU-Rendering

[meta data] [files:
169-176.pdf
]
Meyer, Quirin
; 
Sussner, Gerd
; 
Greiner, Günter
; 
Stamminger, Marc

A Mathematical Model and Calibration Procedure for Galvanometric Laser Scanning Systems

[meta data] [files:
207-214.pdf
]
Manakov, Alkhazur
; 
Seidel, Hans-Peter
; 
Ihrke, Ivo

A Framework for Interactive Visualization and Classification of Dynamical Processes at the Water Surface

[meta data] [files:
199-206.pdf
]
Wanner, Sven
; 
Sommer, Christoph
; 
Rocholz, Roland
; 
Jung, Michael
; 
Hamprecht, Fred
; 
Jähne, Bernd

Adaptive Sampling for Geometry-aware Reconstruction Filters

[meta data] [files:
183-190.pdf
]
Bauszat, Pablo
; 
Eisemann, Martin
; 
Magnor, Marcus

A Clustering-based Visualization Technique to Emphasize Meaningful Regions of Vector Fields

[meta data] [files:
191-198.pdf
]
Kuhn, Alexander
; 
Lehmann, Dirk J.
; 
Gaststeiger, Rocco
; 
Neugebauer, Matthias
; 
Preim, Bernhard
; 
Theisel, Holger

A View-Dependent and Inter-Frame Coherent Visualization of Integral Lines using Screen Contribution

[meta data] [files:
215-222.pdf
]
Günther, Tobias
; 
Bürger, Kai
; 
Westermann, Rüdiger
; 
Theisel, Holger

AFiT - Atrial Fibrillation Ablation Planning Tool

[meta data] [files:
223-230.pdf
]
Brost, Alexander B.
; 
Bourier, Felix
; 
Kleinoeder, Andreas
; 
Raab, Jens
; 
Koch, Martin
; 
Stamminger, Marc
; 
Hornegger, Joachim
; 
Strobel, Norbert
; 
Kurzidim, Klaus

Effective Back-Patch Culling for Hardware Tessellation

[meta data] [files:
263-268.pdf
]
Loop, Charles
; 
Nießner, Matthias
; 
Eisenacher, Christian

Data-Driven Visualization of Functional Brain Regions from Resting State fMRI Data

[meta data] [files:
247-254.pdf
]
Crippa, Alessandro
; 
Roerdink, Jos B.T.M.

Direct Visualization of Particle-Partition of Unity Data

[meta data] [files:
255-262.pdf
]
Ãœffinger, Markus
; 
Schweitzer, Marc Alexander
; 
Sadlo, Filip
; 
Ertl, Thomas

Assessment of Time-of-Flight Cameras for Short Camera-Object Distances

[meta data] [files:
231-238.pdf
]
Stürmer, Michael
; 
Becker, Guido
; 
Hornegger, Joachim

Extrinsic Self-Calibration of Time-of-Flight Cameras using a Combination of 3D and Intensity Descriptors

[meta data] [files:
269-276.pdf
]
Schmidt, Jörn
; 
Brückner, Marcel
; 
Denzler, Joachim

Auto-Tilt Photography

[meta data] [files:
239-246.pdf
]
Sadlo, Filip
; 
Dachsbacher, Carsten

Interactive Exploration of Polymer-Solvent Interactions

[meta data] [files:
301-308.pdf
]
Thomaß, Bertram
; 
Walter, Jonathan
; 
Krone, Michael
; 
Hasse, Hans
; 
Ertl, Thomas

Instant Level-of-Detail

[meta data] [files:
293-299.pdf
]
Grund, Nico
; 
Derzapf, Evgenij
; 
Guthe, Michael

Landmark-constrained 3-D Histological Imaging: A Morphology-preserving Approach

[meta data] [files:
309-316.pdf
]
Gaffling, Simone
; 
Daum, Volker
; 
Hornegger, Joachim

Implicit Filtering for Image and Shape Processing

[meta data] [files:
277-283.pdf
]
Belyaev, Alexander
; 
Yamauchi, Hitoshi

Improving Stability and Compactness in Street Layout Visualizations

[meta data] [files:
285-292.pdf
]
Kratt, Julian
; 
Strobelt, Hendrik
; 
Deussen, Oliver

Markerless Motion Capture using multiple Color-Depth Sensors

[meta data] [files:
317-324.pdf
]
Berger, Kai
; 
Ruhl, Kai
; 
Schroeder, Yannic
; 
Bruemmer, Christian
; 
Scholz, Alexander
; 
Magnor, Marcus

Measuring BRDFs of Immersed Materials

[meta data] [files:
325-330.pdf
]
Berger, Kai
; 
Reshetouski, Ilya
; 
Magnor, Marcus
; 
Ihrke, Ivo

Seamless Integration of Multimodal Shader Compositing into a Flexible Ray Casting Pipeline

[meta data] [files:
347-352.pdf
]
Arens, Stephan
; 
Bolte, Matthias
; 
Domik, Gitta

The Recognition of Ethnic Groups based on Histological Skin Properties

[meta data] [files:
353-360.pdf
]
Malskies, Christoph R.
; 
Eibenberger, Eva
; 
Angelopoulou, Elli

Monocular Pose Reconstruction for an Augmented Reality Clothing System

[meta data] [files:
339-346.pdf
]
Rogge, Lorenz
; 
Neumann, Thomas
; 
Wacker, Markus
; 
Magnor, Marcus

Meshless Hierarchical Radiosity on the GPU

[meta data] [files:
331-338.pdf
]
Zollhöfer, Michael
; 
Stamminger, Marc

Probabilistic Inverse Dynamics for Blood Pattern Reconstruction

[meta data] [files:
369-376.pdf
]
Cecchetto, Benjamin T.
; 
Heidrich, Wolfgang

Is it Necessary to Model the Matrix Degrading Enzymes for Simulating Tumour Growth?

[meta data] [files:
361-368.pdf
]
Toma, Alina
; 
Mang, Andreas
; 
Schütz, Tina A.
; 
Becker, Stefan
; 
Buzug, Thorsten M.

BibTeX (VMV11)
@inproceedings{
:10.2312/PE/VMV/VMV11/001-008,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Surface Flow from Visual Cues}},

author = {
Petit, Benjamin
 and 
Letouzey, Antoine
 and 
Boyer, Edmond
 and 
Franco, Jean-Sébastien
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/001-008}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/009-015,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
A Global Optimization Approach to High-detail Reconstruction of the Head}},

author = {
Schneider, David C.
 and 
Kettern, Markus
 and 
Hilsmann, Anna
 and 
Eisert, Peter
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/009-015}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/017-024,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
FreeCam: A Hybrid Camera System for Interactive Free-Viewpoint Video}},

author = {
Kuster, Claudia
 and 
Popa, Tiberiu
 and 
Zach, Christopher
 and 
Gotsman, Craig
 and 
Gross, Markus
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/017-024}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/033-040,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Pose Correction by Space-Time Integration}},

author = {
Esturo, Janick Martinez
 and 
Rössl, Christian
 and 
Fröhlich, Stefan
 and 
Botsch, Mario
 and 
Theisel, Holger
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/033-040}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/041-048,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Partial Symmetry Detection in Volume Data}},

author = {
Kerber, Jens
 and 
Wand, Michael
 and 
Krüger, Jens
 and 
Seidel, Hans-Peter
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/041-048}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/025-032,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Depth Driven Photometric and Geometric Image Registration for Real-Time Stereo Systems}},

author = {
Waizenegger, Wolfgang
 and 
Feldmann, Ingo
 and 
Eisert, Peter
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/025-032}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/049-056,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Simulating Deep Sea Underwater Images Using Physical Models for Light Attenuation, Scattering, and Refraction}},

author = {
Sedlazeck, Anne
 and 
Koch, Reinhard
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/049-056}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/057-064,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
RITK: The Range Imaging Toolkit - A Framework for 3-D Range Image Stream Processing}},

author = {
Wasza, Jakob
 and 
Bauer, Sebastian
 and 
Haase, Sven
 and 
Schmid, Moritz
 and 
Reichert, Sebastian
 and 
Hornegger, Joachim
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/057-064}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/065-071,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Object-aware Gradient-Domain Image Compositing}},

author = {
Eisemann, Martin
 and 
Kokemüller, Jan
 and 
Magnor, Marcus
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/065-071}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/081-087,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Smooth Transitions for Large Scale Changes in Multi-Resolution Images}},

author = {
Lancelle, Marcel
 and 
Fellner, Dieter W.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/081-087}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/073-080,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Warp-based Near-Regular Texture Analysis for Image-based Texture Overlay}},

author = {
Hilsmann, Anna
 and 
Schneider, David C.
 and 
Eisert, Peter
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/073-080}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/089-096,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Near-Regular Texture Synthesis by Random Sampling and Gap Filling}},

author = {
Recas, Diego Lopez
 and 
Hilsmann, Anna
 and 
Eisert, Peter
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/089-096}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/097-103,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
SBL Mesh Filter: A Fast Separable Approximation of Bilateral Mesh Filtering}},

author = {
Vialaneix, Guillaume
 and 
Boubekeur, Tamy
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/097-103}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/105-112,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Surface Reconstruction from Multi-resolution Sample Points}},

author = {
Mücke, Patrick
 and 
Klowsky, Ronny
 and 
Goesele, Michael
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/105-112}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/113-120,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Koiter's Thin Shells on Catmull-Clark Limit Surfaces}},

author = {
Wawrzinek, Anna
 and 
Hildebrandt, Klaus
 and 
Polthier, Konrad
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/113-120}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/129-136,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
AVDT - Automatic Visualization of Descriptive Texts}},

author = {
Spika, Christian
 and 
Schwarz, Katharina
 and 
Dammertz, Holger
 and 
Lensch, Hendrik P. A.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/129-136}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/137-144,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
A Cluster Hierarchy-based Volume Rendering Approach for Interactive Visual Exploration of Multi-variate Volume Data}},

author = {
Dobrev, Petar
 and 
Long, Tran Van
 and 
Linsen, Lars
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/137-144}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/121-128,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Fast and Efficient 3D Chamfer Distance Transform for Polygonal Meshes}},

author = {
Martinek, Michael
 and 
Grosso, Roberto
 and 
Greiner, Günther
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/121-128}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/153-160,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Extracting Flow Structures Using Sparse Particles}},

author = {
Agranovsky, Alexy
 and 
Garth, Christoph
 and 
Joy, Kenneth I.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/153-160}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/145-152,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Particle-Based Anisotropic Sampling for Two-Dimensional Tensor Field Visualization}},

author = {
Kratz, Andrea
 and 
Kettlitz, Nino
 and 
Hotz, Ingrid
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/145-152}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/161-168,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Real-time Rendering of Stack-based Terrains}},

author = {
Löffler, Falko
 and 
Müller, Andreas
 and 
Schumann, Heidrun
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/161-168}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/177-182,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Bent Normals and Cones in Screen-space}},

author = {
Klehm, Oliver
 and 
Ritschel, Tobias
 and 
Eisemann, Elmar
 and 
Seidel, Hans-Peter
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/177-182}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/169-176,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Adaptive Level-of-Precision for GPU-Rendering}},

author = {
Meyer, Quirin
 and 
Sussner, Gerd
 and 
Greiner, Günter
 and 
Stamminger, Marc
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/169-176}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/207-214,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
A Mathematical Model and Calibration Procedure for Galvanometric Laser Scanning Systems}},

author = {
Manakov, Alkhazur
 and 
Seidel, Hans-Peter
 and 
Ihrke, Ivo
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/207-214}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/199-206,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
A Framework for Interactive Visualization and Classification of Dynamical Processes at the Water Surface}},

author = {
Wanner, Sven
 and 
Sommer, Christoph
 and 
Rocholz, Roland
 and 
Jung, Michael
 and 
Hamprecht, Fred
 and 
Jähne, Bernd
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/199-206}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/183-190,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Adaptive Sampling for Geometry-aware Reconstruction Filters}},

author = {
Bauszat, Pablo
 and 
Eisemann, Martin
 and 
Magnor, Marcus
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/183-190}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/191-198,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
A Clustering-based Visualization Technique to Emphasize Meaningful Regions of Vector Fields}},

author = {
Kuhn, Alexander
 and 
Lehmann, Dirk J.
 and 
Gaststeiger, Rocco
 and 
Neugebauer, Matthias
 and 
Preim, Bernhard
 and 
Theisel, Holger
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/191-198}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/215-222,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
A View-Dependent and Inter-Frame Coherent Visualization of Integral Lines using Screen Contribution}},

author = {
Günther, Tobias
 and 
Bürger, Kai
 and 
Westermann, Rüdiger
 and 
Theisel, Holger
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/215-222}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/223-230,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
AFiT - Atrial Fibrillation Ablation Planning Tool}},

author = {
Brost, Alexander B.
 and 
Bourier, Felix
 and 
Kleinoeder, Andreas
 and 
Raab, Jens
 and 
Koch, Martin
 and 
Stamminger, Marc
 and 
Hornegger, Joachim
 and 
Strobel, Norbert
 and 
Kurzidim, Klaus
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/223-230}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/263-268,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Effective Back-Patch Culling for Hardware Tessellation}},

author = {
Loop, Charles
 and 
Nießner, Matthias
 and 
Eisenacher, Christian
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/263-268}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/247-254,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Data-Driven Visualization of Functional Brain Regions from Resting State fMRI Data}},

author = {
Crippa, Alessandro
 and 
Roerdink, Jos B.T.M.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/247-254}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/255-262,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Direct Visualization of Particle-Partition of Unity Data}},

author = {
Ãœffinger, Markus
 and 
Schweitzer, Marc Alexander
 and 
Sadlo, Filip
 and 
Ertl, Thomas
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/255-262}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/231-238,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Assessment of Time-of-Flight Cameras for Short Camera-Object Distances}},

author = {
Stürmer, Michael
 and 
Becker, Guido
 and 
Hornegger, Joachim
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/231-238}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/269-276,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Extrinsic Self-Calibration of Time-of-Flight Cameras using a Combination of 3D and Intensity Descriptors}},

author = {
Schmidt, Jörn
 and 
Brückner, Marcel
 and 
Denzler, Joachim
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/269-276}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/239-246,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Auto-Tilt Photography}},

author = {
Sadlo, Filip
 and 
Dachsbacher, Carsten
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/239-246}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/301-308,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Interactive Exploration of Polymer-Solvent Interactions}},

author = {
Thomaß, Bertram
 and 
Walter, Jonathan
 and 
Krone, Michael
 and 
Hasse, Hans
 and 
Ertl, Thomas
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/301-308}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/293-299,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Instant Level-of-Detail}},

author = {
Grund, Nico
 and 
Derzapf, Evgenij
 and 
Guthe, Michael
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/293-299}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/309-316,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Landmark-constrained 3-D Histological Imaging: A Morphology-preserving Approach}},

author = {
Gaffling, Simone
 and 
Daum, Volker
 and 
Hornegger, Joachim
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/309-316}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/277-283,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Implicit Filtering for Image and Shape Processing}},

author = {
Belyaev, Alexander
 and 
Yamauchi, Hitoshi
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/277-283}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/285-292,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Improving Stability and Compactness in Street Layout Visualizations}},

author = {
Kratt, Julian
 and 
Strobelt, Hendrik
 and 
Deussen, Oliver
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/285-292}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/317-324,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Markerless Motion Capture using multiple Color-Depth Sensors}},

author = {
Berger, Kai
 and 
Ruhl, Kai
 and 
Schroeder, Yannic
 and 
Bruemmer, Christian
 and 
Scholz, Alexander
 and 
Magnor, Marcus
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/317-324}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/325-330,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Measuring BRDFs of Immersed Materials}},

author = {
Berger, Kai
 and 
Reshetouski, Ilya
 and 
Magnor, Marcus
 and 
Ihrke, Ivo
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/325-330}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/347-352,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Seamless Integration of Multimodal Shader Compositing into a Flexible Ray Casting Pipeline}},

author = {
Arens, Stephan
 and 
Bolte, Matthias
 and 
Domik, Gitta
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/347-352}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/353-360,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
The Recognition of Ethnic Groups based on Histological Skin Properties}},

author = {
Malskies, Christoph R.
 and 
Eibenberger, Eva
 and 
Angelopoulou, Elli
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/353-360}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/339-346,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Monocular Pose Reconstruction for an Augmented Reality Clothing System}},

author = {
Rogge, Lorenz
 and 
Neumann, Thomas
 and 
Wacker, Markus
 and 
Magnor, Marcus
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/339-346}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/331-338,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Meshless Hierarchical Radiosity on the GPU}},

author = {
Zollhöfer, Michael
 and 
Stamminger, Marc
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/331-338}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/369-376,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Probabilistic Inverse Dynamics for Blood Pattern Reconstruction}},

author = {
Cecchetto, Benjamin T.
 and 
Heidrich,  Wolfgang
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/369-376}

}
@inproceedings{
:10.2312/PE/VMV/VMV11/361-368,

booktitle = {
Vision, Modeling, and Visualization (2011)},

editor = {
Peter Eisert and Joachim Hornegger and Konrad Polthier
},
title = {{
Is it Necessary to Model the Matrix Degrading Enzymes for Simulating Tumour Growth?}},

author = {
Toma, Alina
 and 
Mang, Andreas
 and 
Schütz, Tina  A.
 and 
Becker, Stefan
 and 
Buzug, Thorsten M.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-85-2},

DOI = {
/10.2312/PE/VMV/VMV11/361-368}

}

Browse

Recent Submissions

Now showing 1 - 48 of 48
  • Thumbnail Image
    Item
    Surface Flow from Visual Cues
    (The Eurographics Association, 2011) Petit, Benjamin; Letouzey, Antoine; Boyer, Edmond; Franco, Jean-Sébastien; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In this paper we study the estimation of dense, instantaneous 3D motion fields over a non-rigidly moving surface observed by multi-camera systems. The motivation arises from multi-camera applications that require motion information, for arbitrary subjects, in order to perform tasks such as surface tracking or segmentation. To this aim, we present a novel framework that allows to efficiently compute dense 3D displacement fields using low level visual cues and geometric constraints. The main contribution is a unified framework that combines flow constraints for small displacements with temporal feature constraints for large displacements and fuses them over the surface using local rigidity constraints. The resulting linear optimization problem allows for variational solutions and fast implementations. Experiments conducted on synthetic and real data demonstrate the respective roles of flow and feature constraints as well as their ability to provide robust surface motion cues when combined.
  • Thumbnail Image
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    A Global Optimization Approach to High-detail Reconstruction of the Head
    (The Eurographics Association, 2011) Schneider, David C.; Kettern, Markus; Hilsmann, Anna; Eisert, Peter; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The paper presents an approach for reconstructing head-and-shoulder portraits of people from calibrated stereo images with a high level of geometric detail. In contrast to many existing systems, our reconstructions cover the full head, including hair. This is achieved using a global intensity-based optimization approach which is stated as a parametric warp estimation problem and solved in a robust Gauss-Newton framework. We formulate a computationally efficient warp function for mesh-based estimation of depth which is based on a well known image-registration approach and adapted to the problem of 3D reconstruction. We address the use of sparse correspondence estimates for initializing the optimization as well as a coarse-to-fine scheme for reconstructing without specific initialization. We discuss issues of regularization and brightness constancy violations and show various results to demonstrate the effectiveness of the approach.
  • Thumbnail Image
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    FreeCam: A Hybrid Camera System for Interactive Free-Viewpoint Video
    (The Eurographics Association, 2011) Kuster, Claudia; Popa, Tiberiu; Zach, Christopher; Gotsman, Craig; Gross, Markus; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We describe FreeCam - a system capable of generating live free-viewpoint video by simulating the output of a virtual camera moving through a dynamic scene. The FreeCam sensing hardware consists of a small number of static color video cameras and state-of-the-art Kinect depth sensors, and the FreeCam software uses a number of advanced GPU processing and rendering techniques to seamlessly merge the input streams, providing a pleasant user experience. A system such as FreeCam is critical for applications such as telepresence, 3D video-conferencing and interactive 3D TV. FreeCam may also be used to produce multi-view video, which is critical to drive newgeneration autostereoscopic lenticular 3D displays.
  • Thumbnail Image
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    Pose Correction by Space-Time Integration
    (The Eurographics Association, 2011) Esturo, Janick Martinez; Rössl, Christian; Fröhlich, Stefan; Botsch, Mario; Theisel, Holger; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The deformation of a given model into different poses is an important problem in computer graphics and computer animation. In a typical workflow, a carefully designed reference surface is deformed into a couple of poses, which can then act as a basis for interpolating arbitrarily intermediate poses. To this end the input poses should be free of geometric artifacts like self-intersections, since these degeneracies will be reproduced or even amplified by the interpolation. Not only are the resulting artifacts visually disturbing, they typically cause severe numerical problems for further downstream applications. In this paper we present an automatic approach for removing these geometric artifacts from a given set of mesh poses, while maintaining the original mesh connectivity. The deformation from the rest pose to a target pose is faithfully reproduced by integration of a smooth space-time vector field, which by construction guarantees the absence of self-intersections in the repaired target pose. Our approach is computationally efficient, and its effectiveness is demonstrated on a range of typical animation examples.
  • Thumbnail Image
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    Partial Symmetry Detection in Volume Data
    (The Eurographics Association, 2011) Kerber, Jens; Wand, Michael; Krüger, Jens; Seidel, Hans-Peter; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In this paper, we present an algorithm for detecting partial Euclidean symmetries in volume data. Our algorithm finds subsets in voxel data that map to each other approximately under translations, rotations, and reflections. We implement the search for partial symmetries efficiently and robustly using a feature-based approach: We first reduce the volume to salient line features and then create transformation candidates from matching only local configurations of these line networks. Afterwards, only a shortlist of transformation candidates need to be verified using expensive dense volume matching. We apply our technique on both synthetic test scenes as well as real CT scans and show that we can recover a large amount of partial symmetries for complexly structured volume data sets.
  • Thumbnail Image
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    Depth Driven Photometric and Geometric Image Registration for Real-Time Stereo Systems
    (The Eurographics Association, 2011) Waizenegger, Wolfgang; Feldmann, Ingo; Eisert, Peter; Peter Eisert and Joachim Hornegger and Konrad Polthier
    This paper presents a novel depth driven approach for a highly accurate joint photometric and geometric image alignment. Thereby, the registration problem is expressed in terms of a consistent, elegant and efficient energy formulation. Moreover, we propose a real-time capable alternating iterative optimization scheme to solve for a state of minimal energy. Since our energy formulation is based on pixel wise color similarity our registration procedure directly improves the performance of disparity estimation and the visual quality of multi-view view synthesis.
  • Thumbnail Image
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    Simulating Deep Sea Underwater Images Using Physical Models for Light Attenuation, Scattering, and Refraction
    (The Eurographics Association, 2011) Sedlazeck, Anne; Koch, Reinhard; Peter Eisert and Joachim Hornegger and Konrad Polthier
    When adapting computer vision algorithms to underwater imaging, two major differences in image formation occur. While still traveling through the water, light rays are scattered and absorbed depending on their wavelength, creating the typical blue hue and low contrast in underwater images. When entering the underwater housing of the camera, light rays are refracted twice upon passing from water into glass and into air. We propose a simulator for both effects based on physical models for deep sea underwater images captured by cameras in underwater housings with glass port thicknesses in the order of centimeters. Hence, modeling refraction by explicitly computing the correct path of the rays allows to accurately simulate distortions induced by underwater housings. The Jaffe- McGlamery model for effects on color is often used in computer vision algorithms as a base for simplification. We extend this model to incorporate color images, shadows, and several light sources.
  • Thumbnail Image
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    RITK: The Range Imaging Toolkit - A Framework for 3-D Range Image Stream Processing
    (The Eurographics Association, 2011) Wasza, Jakob; Bauer, Sebastian; Haase, Sven; Schmid, Moritz; Reichert, Sebastian; Hornegger, Joachim; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The recent introduction of low-cost devices for real-time acquisition of dense 3-D range imaging (RI) streams has attracted a great deal of attention. However, to date, there exists no open source framework that is explicitly dedicated to real-time processing of RI streams. In this paper, we present the Range Imaging Toolkit (RITK). The goal is to provide a powerful yet intuitive software platform that facilitates the development of range image stream applications. RITK puts emphasis on real-time processing of range image streams and proposes the use of a dedicated pipeline mechanism. Furthermore, we introduce a powerful and convenient interface for range image processing on the graphics processing unit (GPU). Being designed thoroughly and in a generic manner, the toolkit is able to cope with the broad diversity of data streams provided by available RI devices and can easily be extended by custom range imaging sensors or processing modules. RITK is an open source project and will be made publicly available at http://www5.cs.fau.de/ritk.
  • Thumbnail Image
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    Object-aware Gradient-Domain Image Compositing
    (The Eurographics Association, 2011) Eisemann, Martin; Kokemüller, Jan; Magnor, Marcus; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We describe an approach to suppress bleeding artifacts without altering the boundary location in gradient-domain compositing, a technique to create seamless composites. While gradient-domain compositing has become a stan- dard tool for many complex image editing tasks such as seamless cloning, panorama stitching or scene completion, its quality suffers from mismatches in the composited image regions. We propose an approach that is robust to non- optimal region selection by the user without altering his selection which may be neither intended nor possible for certain compositing tasks. In addition, we present an easy-to-use extension to composite interleaving objects. The usability of our approach is demonstrated by several image compositing tasks and comparisons to current state-of-the-art algorithms in gradient-domain image compositing are presented.
  • Thumbnail Image
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    Smooth Transitions for Large Scale Changes in Multi-Resolution Images
    (The Eurographics Association, 2011) Lancelle, Marcel; Fellner, Dieter W.; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Today's super zoom cameras offer a large optical zoom range of over 30x. It is easy to take a wide angle photograph of the scene together with a few zoomed in high resolution crops. Only little work has been done to appropriately display the high resolution photo as an inset. Usually, to hide the resolution transition, alpha blending is used. Visible transition boundaries or ghosting artifacts may result. In this paper we introduce a different, novel approach to overcome these problems. Across the transition, we gradually attenuate the maximum image frequency. We achieve this with a Gaussian blur with an exponentially increasing standard deviation.
  • Thumbnail Image
    Item
    Warp-based Near-Regular Texture Analysis for Image-based Texture Overlay
    (The Eurographics Association, 2011) Hilsmann, Anna; Schneider, David C.; Eisert, Peter; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Image-based texture overlay or retexturing is the process of augmenting a surface in an image or a video sequence with a new, synthetic texture. Some properties of the original texture such as texture distortion as well as lighting conditions should be preserved for a realistic appearance of the augmented result. One approach would be to estimate a 3-dimensional geometry of the surface. However, this is an ill-posed problem for complex deformed surfaces like cloth, especially if only one image is given. In an image-based approach, these properties are directly estimated from the image. The key challenge is to separate the shading information from the actual local texture and to retrieve the texture distortion from an image without any knowledge of the underlying scene. In this paper, we model an image of a deformed regular texture as a combination of its deformed surface albedo, a shading map and additional high frequency details. We present a method for determination of these intrinsic parts of a given texture image by first estimating the appearance of a small texture element and then synthesizing a reference image of the undeformed regular texture. In a subsequent image-based optimization method this reference image is iteratively warped spatially and photometrically onto the original image whilst estimating deformation and illumination parameters. The decomposition is used to create images of new textures with the same deformation and illumination properties as in the original image.
  • Thumbnail Image
    Item
    Near-Regular Texture Synthesis by Random Sampling and Gap Filling
    (The Eurographics Association, 2011) Recas, Diego Lopez; Hilsmann, Anna; Eisert, Peter; Peter Eisert and Joachim Hornegger and Konrad Polthier
    This paper addresses the synthesis of near-regular textures, i.e. textures that consist of a regular global structure plus subtle yet very characteristic stochastic irregularities. Such textures are difficult to synthesize due to the complementary characteristics of these structures. In this paper, we propose a method which we call Random Sampling and Gap Filling (RSGF) to synthesize near-regular textures. The synthesis approach is guided by a lattice of the global structure estimated from a generalized normalized autocorrelation of the sample image. This lattice constrains a random sampling process to maintain the global regular structure yet ensuring the characteristic randomness of the irregular structures. Results presented in this paper show that our method does not only produce convincing results for regular or near-regular textures but also for irregular textures.
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    SBL Mesh Filter: A Fast Separable Approximation of Bilateral Mesh Filtering
    (The Eurographics Association, 2011) Vialaneix, Guillaume; Boubekeur, Tamy; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Bilateral mesh filtering is a simple and powerful feature-preserving filtering operator which allows to smooth or remove noise from surface meshes while preserving important features in a non-iterative way. However, to be effective, such a filter may require quite a large support size, inducing slow processing when applied on high resolution meshes such as the ones produced by automatic 3D acquisition devices. In this paper, we propose a separable approximation of bilateral mesh filtering based on a local decomposition of the bi-dimensional filter into a product of two one-dimensional ones. In particular, we show that this approximation leads to piecewise smooth surfaces which are very close to the ones produced by the exact filter, using only a fraction of the usual required time. Compared to bilateral image filtering, the main problem here is to find meaningful directions at every point to orient the two one-dimensional filters. Our solution exploits the minimum and maximum curvature directions at each point and demonstrates a significant speed-up on meshes ranging from thousands to millions of elements, enabling feature-preserving filtering with large support size in a variety of practical scenarii. Our approach is simple, easy to implement and orthogonal to other kinds of optimizations such as higher dimensional clustering using a bilateral grid or a Gaussian kd-tree and can therefore be combined to them to reach even higher performance.
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    Surface Reconstruction from Multi-resolution Sample Points
    (The Eurographics Association, 2011) Mücke, Patrick; Klowsky, Ronny; Goesele, Michael; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Robust surface reconstruction from sample points is a challenging problem, especially for real-world input data. We significantly improve on a recent method by Hornung and Kobbelt [HK06b] by implementing three major extensions. First, we exploit the footprint information inherent to each sample point, that describes the underlying surface region represented by that sample. We interpret each sample as a vote for a region in space where the size of the region depends on the footprint size. In our method, sample points with large footprints do not destroy the fine detail captured by sample points with small footprints. Second, we propose a new crust computation making the method applicable to a substantially broader range of input data. This includes data from objects that were only partially sampled, a common case for data generated by multi-view stereo applied to Internet images. Third, we adapt the volumetric resolution locally to the footprint size of the sample points which allows to extract fine detail even in large-scale scenes. The effectiveness of our extensions is shown on challenging outdoor data sets as well as on a standard benchmark.
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    Koiter's Thin Shells on Catmull-Clark Limit Surfaces
    (The Eurographics Association, 2011) Wawrzinek, Anna; Hildebrandt, Klaus; Polthier, Konrad; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present a discretization of Koiter's model of elastic thin shells based on a finite element that employs limit surfaces of Catmull Clark's subdivision scheme. The discretization can directly be applied to control grids of Catmull Clark subdivision surfaces, and, therefore, integrates modeling of Catmull Clark subdivision surfaces with analysis and optimization of elastic thin shells. To test the discretization, we apply it to standard examples for physical simulation of thin shells and compute free vibration modes of thin shells. Furthermore, we use the discrete shell model to set up a deformation-based modeling system for Catmull Clark subdivision surfaces. This system integrates modeling of subdivision surfaces with deformation-based modeling and allows to switch back and forth between the two different approaches to modeling.
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    AVDT - Automatic Visualization of Descriptive Texts
    (The Eurographics Association, 2011) Spika, Christian; Schwarz, Katharina; Dammertz, Holger; Lensch, Hendrik P. A.; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Expressing mental images visually as 3D scenes is a time-consuming challenge. Therefore, we employ natural language to facilitate the creation of virtual environments. In this paper, we present a framework, which automatically converts an arbitrary descriptive text into a representative 3D scene. Our system parses a user-written input text, extracts information using techniques from Natural Language Processing (NLP) and identifies relevant units. Based on derived object-to-object relations, our system associates every object with an appropriate 3D model and evaluates spatial dependencies of the entities. The resulting locations are combined based on adequate heuristics in order to create natural looking virtual environments. Finally, a physics engine is used to render a realistic and interactive 3D scene which enables the user to actively manipulate the stage setup.
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    A Cluster Hierarchy-based Volume Rendering Approach for Interactive Visual Exploration of Multi-variate Volume Data
    (The Eurographics Association, 2011) Dobrev, Petar; Long, Tran Van; Linsen, Lars; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Interactive visual analysis of volumetric data relies on intuitive, yet powerful mechanisms to generate transfer functions. For multi-variate data, traditional methods for interactive transfer functions generation are of limited use. We propose a novel approach, where the user operates in a cluster space. It relies on hierarchical densitybased clustering of the high-dimensional feature space. The cluster tree visualization in form of a 2D radial layout serves as an interaction widget for selecting clusters, assigning material properties, changing sizes, merging, and splitting. This widget is complemented by a linked parallel coordinates widget. The interactive selections are automatically mapped to a transfer function for a linked 3D texture-based direct volume rendering, where brushing in parallel coordinates leads to the generation of a 3D binary opacity mask that is overlaid with the opacity values obtained from cluster tree selections. In GPU memory, we only hold the density values from the clustering approach and the cluster IDs. The derived density field allows us to interactively change the size of clusters and to compute normals for lighting. We applied our methods to the visualization of multi-variate data consisting of multiple scalar fields as well as derived scalar property fields from single scalar and vector fields. Our approach scales well to arbitrarily high dimensionality as the complexity of the main user interactions do not increase with the number of dimensions.
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    Fast and Efficient 3D Chamfer Distance Transform for Polygonal Meshes
    (The Eurographics Association, 2011) Martinek, Michael; Grosso, Roberto; Greiner, Günther; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present an efficient GPU-based method to perform 3D chamfer distance transform (CDT) in a wavefront scheme. In this context, we also introduce a binary voxelization algorithm which provides the initial boundary condition for the CDT. The voxelization method is capable of both, surface and solid voxelization, allowing for the computation of unsigned distance fields for arbitrary polygonal meshes and signed distances for models with orientable surfaces. Our method is trimmed on speed rather than accuracy. It works with simple chamfer metrics such as the Manhattan and chessboard distance and requires only a single rendering pass per distance layer. Due to the wavefront scheme, a propagation can be stopped if a required number of distance layers is reached. However, even a complete distance field can be computed in the magnitude of 10?3 seconds including the preprocessing voxelization step. This allows for a use in real-time applications such as path planning or proximity computations. We demonstrate the application of our method for the latter.
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    Extracting Flow Structures Using Sparse Particles
    (The Eurographics Association, 2011) Agranovsky, Alexy; Garth, Christoph; Joy, Kenneth I.; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In recent years, Lagrangian Coherent Structures (LCS) have been characterized using the Finite-Time Lyapunov Exponent, following the advection of a dense set of particles into a corresponding flow field. The large amount of particles needed to sufficiently map a flow field has been a non-trivial computational burden in the application of LCS. By seeding a minimal amount of particles into the flow field, Moving Least Squares, combined with FTLE, will extrapolate the important feature locations at which further refinement is desired. Following the refinement procedure, MLS produces a continuous function reconstruction allowing the characterization of Lagrangian Coherent Structures with a lower number of particles. Through multiple data sets, we show that given a sparse and refined sampling, MLS will reproduce FTLE fields exhibiting a nominal error while maintaining a performance increase when compared to the standard, dense finite difference approach.
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    Particle-Based Anisotropic Sampling for Two-Dimensional Tensor Field Visualization
    (The Eurographics Association, 2011) Kratz, Andrea; Kettlitz, Nino; Hotz, Ingrid; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present a particle-based approach to generate unstructured distributions of elliptical samples. Size and shape of the samples are determined by a local metric that is derived from a two-dimensional tensor field. In contrast to previous methods, we propose the use of an anisotropic Delaunay triangulation of particle positions. It guarantees exact neighbor computations and provides a good means for an explicit and automatic control of prominent holes and overlaps, which otherwise would result in unpleasant visualizations. We use the final distribution to compute a generalized Voronoi diagram, which represents a novel and flexible visualization technique for two-dimensional tensor fields. Via texturing of Voronoi regions, many possibilities arise to design the final image.
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    Real-time Rendering of Stack-based Terrains
    (The Eurographics Association, 2011) Löffler, Falko; Müller, Andreas; Schumann, Heidrun; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Usually, terrain rendering relies on a 2D regular grid of height values, the so called height field. Height fields describe 2.5D surfaces and are not able to present complex 3D terrain features. In contrast, a 3D data representation quickly exceeds the available memory resources. To overcome this problem we apply material stacks. Material stacks combine the simplicity of 2D height fields and the extended modeling capabilities of 3D volumetric data. However, this approach requires expensive rendering and is difficult to realize in real-time. In this paper we present an innovative real-time rendering approach of terrains relying on material stacks. Our approach is based on two major steps: First, a LoD hierarchy for material-stacks is generated. Second, during rendering a multi-staged quadrangulation pipeline extracts terrain surface from the material stacks. As a result, we achieve real-time frame rates at high resolutions.
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    Bent Normals and Cones in Screen-space
    (The Eurographics Association, 2011) Klehm, Oliver; Ritschel, Tobias; Eisemann, Elmar; Seidel, Hans-Peter; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Ambient occlusion (AO) is a popular technique for real-time as well as offline rendering. One of its benefits is a gain in efficiency due to the fact that occlusion and shading are decoupled which results in an average occlusion that modulates the surface shading. Its main drawback is a loss of realism due to the lack of directional occlusion and lighting. As a solution, the use of bent normals was proposed for offline rendering. This work describes how to compute bent normals and bent cones in combination with screen-space ambient occlusion. These extensions combine the speed and simplicity of AO with physically more plausible lighting.
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    Adaptive Level-of-Precision for GPU-Rendering
    (The Eurographics Association, 2011) Meyer, Quirin; Sussner, Gerd; Greiner, Günter; Stamminger, Marc; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Video memory is a valuable resource that has grown much slower than the rendering power of GPUs over the last years. Today, video memory is often the limiting factor in interactive high-quality rendering applications. The most often used solution to reduce memory consumption is to apply level-of-detail (LOD) methods: only a simplified version of the mesh with less vertices and triangles is kept in memory. In this paper we examine a simple orthogonal compression approach that is mostly neglected: adapting the level-of-precision (LOP) of vertex data. The main idea is to quantize vertex positions according to the current view distance, and adapt precision by adding or removing single bit planes. We provide an analysis of the resulting image error, and show that visual artifacts can be avoided by simply constraining the quantization for critical vertices. Our approach allows both random access on vertex data as well as quickly switching between LOP. In experiments we found that our approach compresses vertex positions by about 70percent on average without loss in rendering performance or image quality.
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    A Mathematical Model and Calibration Procedure for Galvanometric Laser Scanning Systems
    (The Eurographics Association, 2011) Manakov, Alkhazur; Seidel, Hans-Peter; Ihrke, Ivo; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Laser galvanometric scanning systems are commonly used in various fields such as three dimensional scanning, medical imaging, material processing, measurement devices and laser display systems. The systems of such kind suffer from distortions. On top of that they do not have a center of projection, which makes it impossible to use common projector calibration procedures. The paper presents a novel mathematical model to predict the image distortions caused by galvanometric mirror scanning systems. In addition, we describe a calibration procedure for recovering its intrinsic and extrinsic parameters.
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    A Framework for Interactive Visualization and Classification of Dynamical Processes at the Water Surface
    (The Eurographics Association, 2011) Wanner, Sven; Sommer, Christoph; Rocholz, Roland; Jung, Michael; Hamprecht, Fred; Jähne, Bernd; Peter Eisert and Joachim Hornegger and Konrad Polthier
    A framework for the visualization and classification of multi-channel spatio-temporal data from water wave imaging is presented. Our interactive visualization tool, WaveVis, allows a detailed study of the water surface shape in reference to additional data streams, like thermographic images or classification results. This facilitates an intuitive and effective inspection of huge amounts of data. WaveVis was used to select representative training examples of events for a supervised learning approach and to evaluate the results of the classification. The interactive classification and segmentation software ilastik was used to train a Random Forest classifier. The benefit of the combination of both programs is demonstrated for two applications, the estimation of the rain rate from the segmentation of impact craters, and the detection of small scale breaking waves. The classification of the impact crater of raindrops on the water surface worked very well, whereas the detection of the breaking waves was satisfactory only under certain experimental conditions. Nevertheless, the combination of WaveVis and ilastik proved to be valuable in both cases.
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    Adaptive Sampling for Geometry-aware Reconstruction Filters
    (The Eurographics Association, 2011) Bauszat, Pablo; Eisemann, Martin; Magnor, Marcus; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present an adaptive sampling scheme for Monte-Carlo-based renderers with the aim to support geometryaware filtering techniques for interactive computation of global illumination. While sophisticated filtering techniques for homogeneous areas can already produce high-quality results with as few as one sample per pixel, these approaches lack the ability to filter sufficiently in the vicinity of complex geometric structures. The result are visible artifacts in the final rendering result. Our sampling scheme distributes the samples for the indirect illumination in the image plane according to the necessity of a geometry-aware filtering. We show how to implement our scheme efficiently on current graphics hardware and how to combine it with a sophisticated filtering in order to achieve high-quality interactive frame rates for global illumination simulations. The resulting computational overhead is only in the range of a few milliseconds, making our approach suitable for real-time implementations.
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    A Clustering-based Visualization Technique to Emphasize Meaningful Regions of Vector Fields
    (The Eurographics Association, 2011) Kuhn, Alexander; Lehmann, Dirk J.; Gaststeiger, Rocco; Neugebauer, Matthias; Preim, Bernhard; Theisel, Holger; Peter Eisert and Joachim Hornegger and Konrad Polthier
    This paper proposes a vector field visualization approach that extracts and visualizes grouped regions of static 3D vector fields of similar curvature behavior. These regions are argued to ease the recognition of regions of potential interest and accelerate the general exploration process of vector fields. Our approach detects regions of similar geometric stream properties such as integral curvature and visualizes them by means of compact cluster boundaries. To supplement existing approaches our method combines information on relevant scales to extract meaningful semantical aspects of the overall field structure. For proof of concept we illustrate our results based on real and synthetic data sets.
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    A View-Dependent and Inter-Frame Coherent Visualization of Integral Lines using Screen Contribution
    (The Eurographics Association, 2011) Günther, Tobias; Bürger, Kai; Westermann, Rüdiger; Theisel, Holger; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In vector field visualization, integral lines like stream, path, or streak lines are often used to examine the behavior of steady and unsteady flows. In 3D, however, visualizing integral lines is problematic since the resulting geometric structures cause occlusions, often hiding relevant features in the data. For this reason one important goal is to find a minimum number of lines which can represent all relevant features in the vector field. In this paper we propose a novel approach that reduces the number of displayed lines, and occlusions thereof, by smoothly fading out lines based on their contribution to the viewport. In order to reduce visual clutter that is introduced by rendering multiple line contribution into one pixel, the blending equation is slightly modified. In addition, an interactive brushing is applied to further support exploration. Our approach attains a view-dependent visualization of integral lines that is inter-frame coherent and achieves real-time frame rates. To demonstrate the effectiveness and efficiency of our approach, we pursued a number of tests using real-world steady and unsteady vector fields.
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    AFiT - Atrial Fibrillation Ablation Planning Tool
    (The Eurographics Association, 2011) Brost, Alexander B.; Bourier, Felix; Kleinoeder, Andreas; Raab, Jens; Koch, Martin; Stamminger, Marc; Hornegger, Joachim; Strobel, Norbert; Kurzidim, Klaus; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The planning of cryo-balloon ablations for treatment of atrial fibrillation is a crucial task for a physician as he has to determine which size of the balloon catheter is required for isolation at each pulmonary vein. Today, the diameter of the pulmonary vein's ostium is measured in a pre-operative data set to determine which type of catheter is most appropriate. We present a novel tool that visualizes a cryo-balloon catheter model within a 3-D model representing a segmented left atrium. Using this approach, physicians are able to better assess the catheter fit. So far, measurement of the pulmonary vein diameters have been performed by evaluation of 2-D slices taken from pre-operative data sets. The first feedback obtained by physicians was very encouraging as this tool offers better insights for balloon catheter ablation procedures.
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    Effective Back-Patch Culling for Hardware Tessellation
    (The Eurographics Association, 2011) Loop, Charles; Nießner, Matthias; Eisenacher, Christian; Peter Eisert and Joachim Hornegger and Konrad Polthier
    When rendering objects with hardware tessellation, back-facing patches should be culled as early as possible to avoid unnecessary surface evaluations, and setup costs for the tessellator and rasterizer. For dynamic objects the popular cone-of-normals approach is usually approximated using tangent and bitangent cones. This is faster to compute, but less effective. We present a novel approach using the Bézier convex hull of the parametric tangent plane. It is much more accurate, and by operating in clip space we are able to reduce the computational cost significantly. As our algorithm vectorizes well, we observe comparable test times with increased cull-rates.
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    Data-Driven Visualization of Functional Brain Regions from Resting State fMRI Data
    (The Eurographics Association, 2011) Crippa, Alessandro; Roerdink, Jos B.T.M.; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Functional parcellation of the human cortex plays an important role in the understanding of brain functions. Tradi- tionally, functional areas are defined according to anatomical landmarks. Recently, new techniques were proposed that do not require a priori segmentation of the cortex. Such methods allow functional parcellation by functional information alone. We propose here a data-driven approach for the exploration of functional connectivity of the cortex. The method extends a known parcellation method, used in multichannel EEG analysis, to define and extract functional units (FUs), i.e., spatially connected brain regions that record highly correlated fMRI signals. We apply the method to the study of fMRI data and provide a visualization, inspired by the EEG case, that uses linked views to facilitate the understanding of both the location and the functional similarity of brain regions. Initial feedback on our approach was received from four domain experts, researchers in the field of neuroscience.
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    Direct Visualization of Particle-Partition of Unity Data
    (The Eurographics Association, 2011) Ãœffinger, Markus; Schweitzer, Marc Alexander; Sadlo, Filip; Ertl, Thomas; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Direct visualization of higher-order data provides manifold advantages over the traditional approach, which is based on resampling and subsequent visualization by interpolation-based techniques. Most important, it avoids excessive computation and consumption of memory, and prevents artifacts by pixel-accurate visualization at interactive rates. This work addresses particle-partition of unity simulation data, where fields are modeled both using cell-based analytic representations together with enrichment functions centered at individual points. This combination of bases allows for superior simulation convergence rates and is able to capture high field variations with comparably small sets of basis functions. In this paper we propose direct visualization of such data from 2D simulations, providing accurate insight. We additionally visualize solver performance, allowing for more directed simulation design, and exemplify our technique using a GPU-based prototype on crack simulation examples.
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    Assessment of Time-of-Flight Cameras for Short Camera-Object Distances
    (The Eurographics Association, 2011) Stürmer, Michael; Becker, Guido; Hornegger, Joachim; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In this paper we have compared Time-of-Flight cameras of different vendors at object-camera distances of 500 mm, 1500 mm and 2500 mm. The aim was to find the highest possible precision at the distance of 500 mm, to estimate the change of the accuracy depending on scene-reflectivity and working distance and to investigate the possibility to use the cameras as per-pixel sub-centimeter accurate measuring devices. To this end, we have evaluated the variation of the distance measurement noise over several distances as well as the minimum noise we could achieve with each camera. As the amplitude-dependent distance error may become significantly large, we also tried to quantify it in order to estimate if it can be reduced to fulfill given accuracy requirements. We compared a Camcube3 from PMD Technologies, a Swissranger4000 from MESA Imaging and a C70E from Fotonic. All cameras showed different behaviors in terms of temporal noise, variation of noise and amplitude dependency. The Camcube showed the strongest amplitude dependent effects. The minimum standard deviations at 500 mm distance were at 4.8 mm for the Camcube, 1.6 mm for the Swissranger and 0.9 mm for the C70E.
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    Extrinsic Self-Calibration of Time-of-Flight Cameras using a Combination of 3D and Intensity Descriptors
    (The Eurographics Association, 2011) Schmidt, Jörn; Brückner, Marcel; Denzler, Joachim; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Time-of-Flight (ToF) cameras are able to simultaneously record intensity and depth images at a high frequency. Many applications require images that are recorded from different viewpoints. In order to consolidate the recorded data into a common coordinate system, the extrinsic calibration between the cameras needs to be known. From a practical point of view this calibration should be accomplished without any user interaction or artificial calibration objects. Classical approaches for extrinsic self-calibration fail to extract correct point correspondences and do not exploit the important information provided by the depth images. In this paper we discuss the characteristics of extrinsic ToF camera calibration and present a descriptor combination for the extraction of 3D point correspondences. Several experiments on real data demonstrate the robustness and high accuracy of our approach. Our method outperforms the state-of-the-art approach for point correspondence extraction in classical camera images.
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    Auto-Tilt Photography
    (The Eurographics Association, 2011) Sadlo, Filip; Dachsbacher, Carsten; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Tilt-shift camera lenses are a powerful artistic tool to achieve effects like selective focus with very shallow depth of field. Typically they are used by professional photographers only, which is due to the high cost and weight, and the intricate, non-intuitive handling. We introduce the auto-tilt mechanism which is as easy to use as the standard autofocus. It allows automatic sharp focus of objects not parallel to the image plane, such as in landscape photography where getting everything sharp is often desirable. In contrast to pure computational approaches that are based on resampling from focal stacks, our approach based on true exposures enables time-dependent scenes and higher image quality. Auto-tilt can also be controlled via a simple sketching user-interface letting the photographer quickly define image regions inside and outside sharp focus. We demonstrate auto-tilt using a simple rapidly prototyped experimental setup that tilts the sensor (as opposed to classic tilt-shift lenses), and describe possible implementations in off-the-shelf cameras. We also outline future prospects with flexible image sensors currently being developed.
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    Interactive Exploration of Polymer-Solvent Interactions
    (The Eurographics Association, 2011) Thomaß, Bertram; Walter, Jonathan; Krone, Michael; Hasse, Hans; Ertl, Thomas; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The interaction of three-dimensional linked hydrophilic polymers with surrounding solvents in time-dependent data sets is of great interest for domain experts and current research in molecular dynamics. These polymers are called hydrogels, and their most characteristic property is their swelling in aqueous solutions by absorbing the solvent. Their conformation transition can be studied by investigations of the interaction of the single polymer strand and the solvent directly around the polymer at an atomistic level. We present new visualization techniques to interactively study time-dependent data sets from molecular dynamics simulations-with special regard to polymer-solvent interactions like local concentrations and hydrogen bonds-as well as filtering methods to facilitate analysis. Such methods that visualize polymer-solvent interactions on a hydration shell around a polymer are not available in current tools and can greatly facilitate the visual analysis, which helps domain experts to extract additional information about hydrogel characteristics and gain new insights from the simulation results. While our visual analysis methods presented in this paper clearly facilitate the analysis of hydrogels and lead to new insight, the presented concepts are applicable to other domains like proteins or polymers in general that interact with solvents.
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    Instant Level-of-Detail
    (The Eurographics Association, 2011) Grund, Nico; Derzapf, Evgenij; Guthe, Michael; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Highly detailed models are commonly used in computer games and other interactive rendering applications. In this context, static levels-of-detail are frequently used to achieve real-time frame rates. While this is a simple solution to improve the rendering performance, the additional geometry needs to be stored and loaded into graphics memory. This is especially problematic in online applications, where the data needs to be transmitted over a possibly slow connection. On the other hand, consumer level computers are usually equipped with a graphics card that can be used for general purpose parallel computing. Based on this observation, we propose a high-quality parallel mesh simplification algorithm based on the quadric error metric. The simplification performance can compete with the time required to load additional meshes from a local hard disk.
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    Landmark-constrained 3-D Histological Imaging: A Morphology-preserving Approach
    (The Eurographics Association, 2011) Gaffling, Simone; Daum, Volker; Hornegger, Joachim; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The inspection of histological image sequences to gain knowledge about the original three-dimensional (3-D) morphological structure is a standard method in medical research. Its main advantage is that light microscopes feature high resolution enhanced visibility due to staining. In many cases this imaging technology could immensely profit from 3-D reconstructions of the slice images. For volumetric stacking, however, the tissue deformations due to slice preparation require an unwarping strategy to restore the original morphology. The challenge is to reverse the artificial deformations while preserving the natural morphological changes. In particular, unintentional straightening of curved structures across multiple slices has to be avoided. In this article, we propose a novel way to incorporate landmarks representing the morphological progression. They are used as additional regularization for intensity based non-rigid registration which is capable to exactly match the landmarks. Our approach is tested on synthetical and histological data sets. We show that it delivers smooth contours while preserving the morphological structure, and is a promising addition to existing methods.
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    Implicit Filtering for Image and Shape Processing
    (The Eurographics Association, 2011) Belyaev, Alexander; Yamauchi, Hitoshi; Peter Eisert and Joachim Hornegger and Konrad Polthier
    The main purpose of this paper consists of demonstrating advantages of using implicit filtering schemes (noncausal IIR filters, in the signal processing language) for some basic image processing and geometric modeling applications. In particular, applications of implicit filtering for curve subdivision, image filtering, estimating image derivatives, and deblurring Gaussian blur are considered.
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    Improving Stability and Compactness in Street Layout Visualizations
    (The Eurographics Association, 2011) Kratt, Julian; Strobelt, Hendrik; Deussen, Oliver; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present and evaluate improvements for Street Layout, a technique that can be used for visualizing evolving hierarchical data such as file structures or software systems. Street Layouts represent data as street networks, where each street represents a branch of the hierarchy and buildings around streets represent leaves. We extended the initial idea in various ways to increase compactness and visual stability. Our approaches are compared against the current methods in a conducted technical evaluation. A prototypic application shows the applicability of our improvements for visualizing a real world data set.
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    Markerless Motion Capture using multiple Color-Depth Sensors
    (The Eurographics Association, 2011) Berger, Kai; Ruhl, Kai; Schroeder, Yannic; Bruemmer, Christian; Scholz, Alexander; Magnor, Marcus; Peter Eisert and Joachim Hornegger and Konrad Polthier
    With the advent of the Microsoft Kinect, renewed focus has been put on monocular depth-based motion capturing. However, this approach is limited in that an actor has to move facing the camera. Due to the active light nature of the sensor, no more than one device has been used for motion capturing so far. In effect, any pose estimation must fail for poses occluded to the depth camera. Our work investigates on reducing or mitigating the detrimental effects of multiple active light emitters, thereby allowing motion capture from all angles. We systematically evaluate the concurrent use of one to four Kinects, including calibration, error measures and analysis, and present a time-multiplexing approach.
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    Measuring BRDFs of Immersed Materials
    (The Eurographics Association, 2011) Berger, Kai; Reshetouski, Ilya; Magnor, Marcus; Ihrke, Ivo; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We investigate the effect of immersing real-world materials into media of different refractive indices. We show, that only some materials follow the Fresnel-governed behaviour. In reality, many materials exhibit unexpected effects such as stronger localized highlights or a significant increase in the glossy reflection due to microgeometry. In this paper, we propose a new measurement technique that allows for measuring the BRDFs of materials that are immersed into different media.
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    Seamless Integration of Multimodal Shader Compositing into a Flexible Ray Casting Pipeline
    (The Eurographics Association, 2011) Arens, Stephan; Bolte, Matthias; Domik, Gitta; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In the last three years a number of multi-volume GPU ray casting systems have been presented. Some of them are very powerful and provide a wide variety of features. However, these approaches are either only capable of displaying multiple modalities together without logically combining them or they lack the necessary flexibility for rapid visual development. These features are fundamental for visualizing the coherent information of multimodal data. In this paper we therefore present an integrated way of visually specifying a volume rendering pipeline including a flexible multimodal compositing of sampling, transfer functions, logical operators and shading. As a result the data flow can be visually constructed and retraced from preprocessing through to the shader operations. Hence intuitive visual prototyping of multimodal transfer function compositing is possible at runtime.
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    The Recognition of Ethnic Groups based on Histological Skin Properties
    (The Eurographics Association, 2011) Malskies, Christoph R.; Eibenberger, Eva; Angelopoulou, Elli; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present an algorithm to recognize ethnic groups based on biologically justified features, such as melanin or hemoglobin concentrations. These biophysical features are extracted from skin reflectance spectra and allow, in contrast to technical features, a medical interpretation and intuitive rating of the recognition results. For this purpose, a physics-based light transport model for skin is required. We use an existing model based on Kubelka-Munk theory, which is physically accurate and computationally tractable. The evaluation of the ethnicity classification reveals that in comparison to an approach, directly based on the reflectance spectra, our proposed biophysical classification is slightly better. To reduce computation time we analyze the impact of spectral band reduction on the ethnicity classification and show that this can be achieved on the expense of only a small accuracy loss.
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    Monocular Pose Reconstruction for an Augmented Reality Clothing System
    (The Eurographics Association, 2011) Rogge, Lorenz; Neumann, Thomas; Wacker, Markus; Magnor, Marcus; Peter Eisert and Joachim Hornegger and Konrad Polthier
    In this paper, we present an approach for realizing an augmented reality system for try-on of apparel. The core component of our system is a quick human pose estimation algorithm based on a single camera view only. Due to monocular input data, pose reconstruction may be ambiguous. We solve this problem by using a markered suit, though not relying on any specific marker layout. To recover 3D joint angles of the person using the system we use Relevance Vector Machine regression with image descriptors that include neighborhood configurations of visible colored markers and image gradient orientations. This novel combination of image descriptors results in a measurable improvement in reconstruction quality. We initialize and evaluate our algorithm with pose data acquired using a motion capture system. As the final step, we simulate a cloth draped around a virtual character adopting the estimated pose. Composing the original view and the rendered cloth creates the illusion of the user wearing virtual garments.
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    Meshless Hierarchical Radiosity on the GPU
    (The Eurographics Association, 2011) Zollhöfer, Michael; Stamminger, Marc; Peter Eisert and Joachim Hornegger and Konrad Polthier
    Meshless radiosity is a radiosity method that is based on a point-based hierarchical discretization of the scene. This better decouples the runtime complexity from the geometric complexity of the scene and allows for an adaptive high-quality simulation of the diffuse global light transport. In this paper, we analyze the bottlenecks of this approach and examine the possibilities for an efficient and parallel implementation of this paradigm on the GPU. We show how by modifying the hierarchical data structures and the computation of the transport operator, a highly efficient GPU-based solution can be achieved which is by orders of magnitude faster and allows to compute highquality global illumination solutions within seconds.
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    Probabilistic Inverse Dynamics for Blood Pattern Reconstruction
    (The Eurographics Association, 2011) Cecchetto, Benjamin T.; Heidrich, Wolfgang; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We present a method of reconstructing the region of origin and trajectories for particles given impact directions and positions. This method works for nonlinear trajectories, such as parabolic motion or motion with drag if given drag parameters. Our method works if given the impact speeds as well, or they can be estimated using a similar total initial energy prior. We apply our algorithm to the case of forensic blood pattern reconstruction, by automatically estimating impact velocities directly form the blood patterns. We validate our method in physically accurate simulated experiments, a feasibility study varying the impact angle and speed to estimate the impact speed from blood drop densities, as well as a forensic experiment using blood to reconstruct the region of origin.
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    Is it Necessary to Model the Matrix Degrading Enzymes for Simulating Tumour Growth?
    (The Eurographics Association, 2011) Toma, Alina; Mang, Andreas; Schütz, Tina A.; Becker, Stefan; Buzug, Thorsten M.; Peter Eisert and Joachim Hornegger and Konrad Polthier
    We propose a hybrid continuum discrete model to simulate tumour growth on a microscopic scale. The lattice based spatio temporal model consists of reaction diffusion equations that describe interactions between cancer cells and their microenvironment. The components that are typically considered are usually nutrients, like oxygen and glucose, matrix degrading enzymes (MDE) and the extracellular matrix (ECM). The in vivo processes are very complex and occur on different levels. This in turn leads to huge computational costs. Thus, the aim is to describe the processes on the basis of simplified mathematical approaches, which depict realistic results at the same time. In this work we discuss if we have to model the MDEs or if the ECM can be modelled directly depending on the cancer cells distribution. Comparing the results for modelling the tumour growth with the common choice and with the simplified model without MDE, we observe almost similar results. The model without MDE allows for a straightforward, fast and accurate implementation.