4D Space-Time Topology for Semantic Flow Segmentation


 
 

 
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Welcome to the home page of the SemSeg project!

On this page you find information about the STREP (small or medium-scale focused research project) SemSeg - 4D Space-Time Topology for Semantic Flow Segmentation, a collaborative research effort of four partners that is funded by the European Commission in the Future and Emerging Technologies (FET) programme (within the Seventh Framework Programme for Research). 


The image, taken in April 2010 in the context of the first SemSeg workshop in Vienna, Austria, shows (a relatively fair subset of) the project partners from ETH Zürich, VRVis in Vienna, the University of Magdeburg, and the University of Bergen, standing on a map of Europe (and approximately where they usually are). 




News

2012-06-29

   

Colaboration with another EU-project results in 3 more papers!

We are excited that our recent collaboration with EU-project VideoSense is already resulting publishable results!  Three papers are now accepted for publication:  (1) ''A Lagrangian Framework for Video Analytics'', published by A. Kuhn, T. Senst, I. Keller, Th. Sikora, H. Theisel in the proceedings of MMSP 2012;  (2) ''Human Action Recognition using Lagrangian Descriptors'', published by E. Acar, T. Senst, A. Kuhn, I. Keller, H. Theisel, S. Albayrak, Th. Sikora in the same proceedings.  and (3) ''Detecting People Carrying Objects utilizing Lagrangian Dynamics'', published by T. Senst, A. Kuhn, H. Theisel, Th. Sikora in the proceedings of AVSS 2012.  More information is available from the results page

2012-06-29

   

Two new papers upcoming soon!

Two more papers got accepted for publication in the soon future:  (1) ''A Hierarchical Splitting Scheme to Reveal Insight into Highly Self-Occluded Integral Surfaces'', published by A. Brambilla, I. Viola, H. Hauser in the proceedings of WSCG 2012;  and (2) ''Ridge Surface Methods for the Visualization of Lagrangian Coherent Structures'', published by R. Peikert, B. Schindler, R. Carnecky in the proceedings of ICFD 2012.  We are especially happy about this ICFD-contribution, since it is documenting interest in SemSeg-results from an important application domain.  More information is available from the results page

2012-06-18

   

Our winning VisContest entry upcoming in CG&A!

We are looking forward to a new article, describing our winning VisContest entry, that will come up in high-quality journal IEEE Computer Graphics and Applications!  The paper is entitled ''2011 IEEE Visualization Contest Winner: Visualizing Unsteady Vortical Behavior of a Centrifugal Pump'' and it is published by M. Otto, A. Kuhn, W. Engelke, H. Theisel.  More information is available from the results page

2012-06-11

   

Paper accepted for TAVA 2012

Our paper ''Interactive Visual Analysis of Families of Curves using Data Aggregation and Derivation'' by Z. Konyha, A. Lež, Kr. Matković, M. Jelović, H. Hauser got accepted for publication in the proceedings of TAVA 2012;  More information is available from the results page

2012-06-11

   

Two papers contributed to EuroVis 2012!

Also this year, we were able to contribute to the annual EuroVis conference.  Two SemSeg-papers were published in the respective special issue of Computer Graphics Forum:  (1) paper ''Vortex Analysis in Uncertain Vector Fields'', by M. Otto, H. Theisel;  and (2) paper ''Multi-layer illustrative dense flow visualization'', by R. Carnecky, B. Schindler, R. Fuchs, R. Peikert;  More information is available from the results page

2012-05-21

   

A new state-of-the-art report by SemSeg at Eurographics 2012

We are very glad that we could contribute another state-of-the-art report, this time on illustrative flow visualization to the EuroGraphics 2012 conference in Cagliari, Italy.  The paper is entitled ''Illustrative Flow Visualization: State of the Art, Trends and Challenges'' and it is published by A. Brambilla, R. Carnecky, R. Peikert, I. Viola, H. Hauser;  More information is available from the results page

2012-05-10

   

Two papers related to our VisContest winning entry

Based on our experiences with the winning IEEE VisContest entry, we were able to work out two new contributions to two application-related events:  (1) paper ''Visuelle Analysemethoden für das Durchströmungsverhalten einer zentrifugalen Pumpe'', published by M. Otto, A. Kuhn, W. Engelke, H. Theisel in the proceedings of the NAFEMS DACH conference 2012;  and (2) paper ''Visualizing Dynamic Flow Transport of a Centrifugal Pump'', published by the same authors in the proceedings of the ISFV15 conference.  More information is available from the results page

2012-03-05

   

Three SemSeg-contributions to IEEE PacificVis 2012!

SemSeg was strongly represented at this year's PacificVis conference in Songdo, Korea.  Three papers have been presented:  (1) ''A Statistics-based Dimension Reduction of the Space of Path Line Attributes for Interactive Visual Flow Analysis'', published by Ar. Pobitzer, A. Lež, Kr. Matković, H. Hauser;  (2) ''A Benchmark for Evaluating FTLE Computations'', published by A. Kuhn, Chr. Rössl, T. Weinkauf, H. Theisel;  and (3) ''Intelligent Cutaway Illustrations'', published by St. Sigg, R. Fuchs, R. Carnecky, R. Peikert.  More information is available from the results page

2012-02-28

   

Time-dependent FlowViz Tutorial at PacificVis 2012

On February 28, 2012, a half-day tutorial on time-dependent flow vizualization was given as part of the PacificVis 2012 conference in Songdo, Korea.  The presenters were H. Hauser (Univ. of Bergen), A. Kuhn (Univ. of Magdeburg), A. Pobitzer (Univ. of Bergen), and M. Schulze (Univ. of Magdeburg).  The slides from this tutorial are now available here: 
Part 1: opening (HH), introduction (HH), and general methods (AP & AK); 
Part 2: Lagrangian methods (AK & AP) and space-time methods (MSch); 
Part 3: interactive visual analysis (HH) 

2012-01-16

   

SemSeg-workshop in Magdeburg

On February 16 & 17, 2012, there will be a SemSeg workshop with two invited talks, four presentations from the SemSeg project, four case studies based on SemSeg-research, as well as several demos and posters.  More information is available from the workshop home page

2011-10-31

   

Winner of the IEEE Visualization Contest 2011!

We are very proud to report that an entry from the SemSeg project was selected as this year's winner of the IEEE Visualization Contest, awarded at the annual IEEE VisWeek, this year in Providence, RI, USA.  Best congratulations to the winners!  More information is available from the results page

2011-10-31

   

Two SemSeg-contributions to IEEE VisWeek 2011

SemSeg contributed two papers to the IEEE VisWeek 2011:  (1) ''Nodes on Ropes: A comprehensive Data and Control Flow for Steering Ensemble Simulations'', published by J. Waser, H. Ribičić, R. Fuchs, Chr. Hirsch, B. Schindler, G. Blöschl, and E. Gröller in high-quality journal IEEE Transactions on Visualization and Computer Graphics;  and (2) ''Interactive Visual Analysis Supporting Design, Tuning, and Optimization of Diesel Engine Injection'', published by Kr. Matković, D. Gračanin, M. Jelović, and H. Hauser in the Discovery Exhibition.  More information is available from the results page

2011-10-07

   

SemSeg-contribution to VMV 2011

A. Kuhn presented our paper ''A Clustering-based Visualization Technique to Emphasize Meaningful Regions of Vector Fields'' (by A. Kuhn, D. Lehmann, R. Gaststeiger, M. Neugebauer, B. Preim, H. Theisel) at the VMV 2012 workshop in Berlin, Germany.  More information is available from the results page

2011-10-03

   

SemSeg-STAR published in CGF!

An extended version of our earlier state-of-the-art report on the visualization of time-dependent flows has now been published in high-quality journal Computer Graphics Forum!  More information is available from the results page

2011-06-24

   

Workshop on Topology in Fluid Flow Visualization in Pisa

A one-day workshop, entitled ''Workshop on Topology in Fluid Flow Visualization'', was organized in Pisa, Italy, to bring together experts from different fields, including scientific visualization, astrophysics, geophysics, applied mathematics, computer vision, and computational fluid dynamics.  Nine highly interesting presentations were given by R. Kerr (Univ. of Warwick), A. Pobitzer (SemSeg), A. Kuhn (SemSeg), B. Schindler (SemSeg), I. Hotz (Zuse Inst. Berlin), R. Ricca (Univ. of Milano-Bicocca), M. Otto (SemSeg), A. Lež (SemSeg), and S. Candelaresi (Univ. of Stockholm).  The workshop was very inspiring, culminating in a panel discussion on the topic ''Topological methods for unsteady flows -- how far is the solution''?  It has shown that there were significant improvements in recent years, but there is still a large potential in this field.  More information about this workshop is available from the workshop web page

2011-06-10

   

SemSeg-contribution to the 6th SPHERIC workshop in Hamburg

SemSeg also contributed to the 6th SPHERIC workshop that was held June 8-10, 2011, in Hamburg, Germany.  B. Schindler presented paper ''Marching Correctors - Fast and Precise Polygonal Isosurfaces of SPH Data'' by B. Schindler, R. Fuchs, J. Waser, and R. Peikert.  More information is available from the results page

2011-06-03

   

Two SemSeg-papers at EuroVis 2011!

The SemSeg-project is especially satisfied that it was present with two paper presentations at EuroVis 2011 in Bergen, Norway.  First presented M. Otto the paper ''Lagrangian Coherent Structures with Guaranteed Material Separation'' by T. Germer, M. Otto, R. Peikert, and H. Theisel in the ''Flow Visualization'' session.  Right afterwards, in the same session, A. Pobitzer presented the paper ''Energy-scale aware feature extraction for flow visualization'' by A. Pobitzer, M. Tutkun, Ø Andreassen, R. Fuchs, R. Peikert, and H. Hauser.  Both papers are published in the high-quality journal Computer Graphics Forum.  More information is available from the results page

2011-05-31

   

SemSeg-contribution to EuroVA 2011

Kr. Matković presented ''Adaptive Interactive Multi-Resolution Computational Steering for Complex Engineering Systems'' by Kr. Matković, D. Gračanin, M. Jelović, and Y. Cao at the EuroVis Workshop on Visual Analytics 2011 (EuroVA 2011) in Bergen, Norway.  More information is available from the results page

2011-05-24

   

SemSeg presented at MekIT'11!

Also in May, 2011, the SemSeg-project was present at the MekIT'11 conference that was held May 23&24, 2011, in Trondheim, Norway.  A. Pobitzer presented ''The SemSeg project and recent developments in flow visualization'' by A. Pobitzer and H. Hauser.  More information is available from the results page

2011-05-22

   

SemSeg presented in Snowbird, Utah!

Ronald Peikert presented SemSeg in the context of his contribution ''Ridge Surface Methods for the Visualization of LCS'' to the SIAM Conference on Applications of Dynamical Systems in Snowbird, Utah, on May 22, 2011. 

2011-05-12

   

Three SemSeg-papers to be published in new Springer book!

As an additional result from TopoInVis 2011, a new book, entitled ''Topological Methods in Data Analysis and Visualization II'', is going to be published by Springer.  It is great that three SemSeg-articles will also be included within this book:  ''Ridge Concepts for the Visualization of Lagrangian Coherent Structures'' by B. Schindler, R. Peikert, R. Fuchs, and H. Theisel;  ''Filtering of FTLE for Visualizing Spatial Separation in Unsteady 3D Flow'' by A. Pobitzer, R. Peikert, R. Fuchs, H. Theisel, and H. Hauser;  as well as ''Scale-Space Approaches to FTLE Ridges'' by R. Fuchs, B. Schindler, and R. Peikert.  This, of course, is very nice!  More information is available from the results page

2011-05-10

   

SemSeg presented to the Inst. of Aerospace Thermodynamics

Ronald Peikert presented SemSeg in the context of his contribution ''Recent Advances in Extracting and Visualizing Structures in .Unsteady Flow Data'' to the TRR 75 Colloquium of the Institute of Aerospace Thermodynamics in Stuttgart, Germany, on May 10, 2011. 

2011-05-06

   

SemSeg-contribution to fet11 in Budapest, Hungary

The SemSeg-project was also present during the fet11 conference in Budapest, Hungary.  Kr. Matković presented ''Current Trends for 4D Space-Time Topology for Semantic Flow Segmentation'' by Kr. Matković, A. Lež, H. Hauser, A. Pobitzer, H. Theisel, A. Kuhn, M. Otto, R. Peikert, B. Schindler, and R. Fuchs.  The short article is available here as well as the poster which presented the SemSeg project. 

2011-04-30

   

SemSeg-paper presented at SCCG 2011!

M. Otto presented a new SemSeg-paper, entitled ''Closed Stream Lines in Uncertain Vector Fields'' by M. Otto, T. Germer, H. Theisel at the SCCG 2011 conference that was held April 28-30, 2011, in Viničné, Slovakia.  More information is available from the results page

2011-04-07

   

2nd SemSeg User Forum Workshop in Zürich!

On the day after the Special SemSeg-session at TopoInVis, the 2nd SemSeg User Forum Workshop was organized in Zürich, Switzerland, hosted by ETH.  Three cases by three forum partners were discussed before a fourth presentation by forum partner SimVis concluded the workshop.  More information is available from the forum page

2011-04-06

   

Special SemSeg session at TopoInVis 2011!

Right after the official closing session of TopoInVis 2011, a Special SemSeg-session at TopoInVis (13h30-17h00) was organized with eight presentations from the SemSeg project:
(1) ''The SemSeg project on 4D Space-Time Topology for Semantic Flow Segmentation'', presented by H. Hauser
(2) ''Proper Orthogonal Decomposition and Feature Extraction'', presented by A. Pobitzer
(3) ''Visualization of Unsteady Flow Topology in Visdom'', presented by R. Fuchs
(4) ''Recent Developments in the Analysis of Unsteady Flow Topologies'', presented by R. Peikert
(5) ''Combining Interactive and Automatic Analysis of Complex Data '', presented by Kr. Matković
(6) ''Interactive Visual Exploration and Analysis of Pathlines in Flow Data'', presented by A. Lež
(7) ''Uncertainty in Flow Topology '', presented by M. Otto
(8) ''Streak Surfaces for Flow Visualization'', presented by H. Theisel

2011-04-06

   

Successful participation of SemSeg at TopoInVis 2011!

TopoInVis 2011, the 4th workshop on topology-based methods in data analysis and visualization, was held successfully in Zürich, Switzerland (hosted by ETH).  The SemSeg-project was strongly participating with all-in-all three presentations!  First, B. Schindler presented ''Ridge Concepts for the Visualization of Lagrangian Coherent Structures'' by B. Schindler, R. Peikert, R. Fuchs, and H. Theisel in the Tuesday morning session on Finite-time Lyapunov Exponents.  In the same session, A. Pobitzer presented ''Filtering of FTLE for Visualizing Spatial Separation in Unsteady 3D Flow'' by A. Pobitzer, R. Peikert, R. Fuchs, H. Theisel, and H. Hauser.  On Wednesday, in the other session on Finite-time Lyapunov Exponents, R. Fuchs presented ''Scale-Space Approaches to FTLE Ridges'' by R. Fuchs, B. Schindler, and R. Peikert.  More information is available from the results page

2011-03-04

   

SemSeg-paper presented at PacificVis 2011!

We are glad that another SemSeg-paper, ''Uncertain Topology of 3D Vector Fields'' by M. Otto, T. Germer, and H. Theisel got published in the proceedings of high-quality conference PacificVis 2011.  M. Otto traveled to Hong Kong to present this paper there.  More information is available from the results page

2011-02-28

   

Two new User Forum partners!

By end of February, 2011, two more partners joined the SemSeg User ForumAVL List GmbH (AVL) joined the forum as well as SimVis GmbH (SimVis).  More information is available via the forum page

2011-02-23

   

SemSeg State of the Art Report to be published by CGF!

Our State-of-the-Art Report ''The State of the Art in Topology-Based Visualization of Unsteady Flow'' by A. Pobitzer, R. Peikert, R. Fuchs, B. Schindler, A. Kuhn, H. Theisel, Kr. Matković, and H. Hauser got accepted for publication in the excellent journal Computer Graphics Forum.  This clearly is a very nice success!  The journal provides the article already online together with preview information.

2011-02-03

   

SemSeg-paper presented at WSCG 2011!

A. Lež from the VRVis in Vienna, Austria, presented paper ''Interactive Exploration and Analysis of Pathlines in Flow Data'' by A. Lež, A. Zajic, Kr. Matković, A. Pobitzer, M. Mayer, and H. Hauser at the WSCG 2011 conference in Plzen, Czech Republic.  Related materials are available from the results page. 

2010-12-12

   

SemSeg presented at the 6th High End Visualization Workshop

Armin Pobitzer from the Univ. of Bergen, Norway, was invited to present the SemSeg project at the 6th High End Visualization Workshop that was held Dec. 8-12, 2010, in Obergurgl, Austria.  The title of his presentation was ''Unsteady Flow Visualization - challanges and recent develoments''. 

2010-11-29

   

Another TVCG paper accepted!

Recently, paper ''Stable Feature Flow Fields'' by T. Weinkauf, H. Theisel, A. Van Gelder, and A. Pang was accepted for publication in the IEEE Transactions on Visualization and Computer Graphics.  Related materials are available from the results page. 

2010-11-05

   

Excellent success at VisWeek 2010!

In late October, 2010, three papers were presented at the IEEE VisWeek 2010:  (1.) ''Streak Lines as Tangent Curves of a Derived Vector Field'' (publ. by T. Weinkauf and H. Theisel in IEEE Transactions on Visualization and Computer Graphics, Volume 16, Number 6) -  this paper was awarded the best paper of VisWeek 2010!  (2.) ''World Lines'' (publ. by J. Waser, R. Fuchs, Hr. Ribičić, G. Blöschl, and E. Gröller also in IEEE Transactions on Visualization and Computer Graphics, Volume 16, Number 6) -  this paper was awarded a honorable mention!  and (3.) ''Interactive Visual Analysis of Multiple Simulation Runs Using the Simulation Model View: Understanding and Tuning of an Electronic Unit Injector'' (publ. by Kr. Matković, D. Gračanin, M. Jelović, A. Ammer, A. Lež, and H. Hauser also in IEEE Transactions on Visualization and Computer Graphics, Volume 16, Number 6). 

Three papers at VisWeek 2010 and two of them awarded - very nice! 

Related materials are available from the results page. 

2010-10-30

   

Another new member in the SemSeg User Forum!

In October, a seventh partner joined the SemSeg User Forum:  the German Aerospace Center (DLR) from Köln, Germany.  More information about the SemSeg User Forum is available on the respective forum page. 

2010-06-28

   

Two new members in the SemSeg User Forum!

In June, a fifth and a sixth partner joined the SemSeg User ForumAndritz VATech HYDRO (Andritz) from Vivey, Switzerland, and the Geophysical Institute (GFI) from Bergen, Norway.  More information about the SemSeg User Forum is available on the respective forum page. 

2010-05-31

   

Nice success also at EuroVis 2010!

In early June, 2010, our paper ''Toward a Lagrangian Vector Field Topology'' (publ. by R. Fuchs, J. Kemmler, B. Schindler, J. Waser, F. Sadlo, H. Hauser, and R. Peikert in Computer Graphics Forum, Volume 29) will be presented at the EuroVis 2010 conference in Bordeaux, France. 

Very nice indeed that SemSeg is already present at the first EuroVis, i.e., Europe's most important visualization conference, after its project start in June 2009! 

Related materials are available from the results page. 

2010-05-07

   

Nice SemSeg contribution to Eurographics 2010!

On 7th of May, 2010, our joint state-of-the-art report ''On the Way Towards Topology-Based Visualization of Unsteady Flow - the State of the Art'' (publ. by A. Pobitzer, R. Peikert, R. Fuchs, B. Schindler, A. Kuhn, H. Theisel, Kr. Matković, and H. Hauser in the State-of-the-Art Proceedings of Eurographics 2010) was presented by Armin Pobitzer, Benjamin Schindler, and Alexander Kuhn at the prestigious Eurographics conference in Norrköping, Sweden. 

Additionally, another paper (''Uncertain 2D Vectorfield Topology'' by M. Otto, T. Germer, H.-Chr. Hege, and H. Theisel, publ. in Computer Graphics Forum 29(2), 2010), where SemSeg was involved, was presented at the same conference. 

It is really great to successfully publish at this so very competitive conference! 

Related materials are available from the results page. 

2010-04-30

   

Successful first User Forum Workshop!

On April 29, the first SemSeg User Forum Workshop was organized with success in Vienna, Austria.  On this interesting day, four selected case studies have been presented and discussed.  Four partners from the User Forum participated in the workshop and contributed with interesting suggestions and input.  The forum web page provides a short overview about the discussed topics at this workshop. 

2010-02-22

   

Two new members in the SemSeg User Forum!

In February, two additional partners joined the SemSeg User Forum:  the AFC Air Flow Consulting AG (AFC) from Switzerland, and the Forsvarets Forskningsinstitutt (FFI) from Kjeller, Norway.  More information about the SemSeg User Forum is available on the respective forum page. 

2010-01-25

   

SemSeg User Forum initialized!

In January, the first two partners joined the SemSeg User Forum:  the Nansen Environmental and Remote Sensing Center (NERSC) from Bergen, Norway, and the Laboratory of Fluid Dynamics and Technical Flows (LSS) from the Univ. of Magdeburg, Germany.  More information about the SemSeg User Forum is available on the respective forum page. 

2009-11-11

   

SemSeg project brochure in first version

We've made a first attempt to come up with a project brochure for SemSeg.  A PDF version of this brochure can be downloaded from the about page (a bit down the page). 

2009-10-14

   

Excellent contribution to the IEEE VisWeek 2009!

On 14th of October, 2009, our paper ''Predictor-Corrector Schemes for Visualization of Smoothed Particle Hydrodynamics Data'' (publ. by B. Schindler, R. Fuchs, J. Biddiscombe, and R. Peikert in the IEEE Transactions on Visualization and Computer Graphics, Vol. 15, No. 6, 2009) was presented by first author Benjamin Schindler at the prestigious IEEE VisWeek 2009 conference in Atlantic City, NJ. 

Additionally, another paper (''Visual Human+Machine Learning'' by R. Fuchs, J. Waser, and M. E. Gröller, also publ. in IEEE TVCG 15(6), 2009), where SemSeg was involved, was presented at the same conference. 

We are happy about this great success and congratulate the authors! 

Related materials are available from the results page. 

2009-09-30

   

Joint SemSeg state of the art report

All four partners of the SemSeg project have compiled a joint state of the art report (STAR) that attempts to cover a larger number of papers that relate to the research focus of the SemSeg project (4D space-time topology for semantic flow segmentation).  The next step wrt. this STAR is to submit it for a possible publication. 

2009-09-09

   

First announcement of the TopoInVis 2011 workshop

In 2011, the fourth workshop on topology-based methods in data analysis and visualization (TopoInVis 2011) will take place in Switzerland, organized by ETH Zürich.  We are already now looking forward to this interesting event! 

2009-08-19

   

First step towards a project home page

We've made a first attempt to set up a project home page (this page).  We are looking forward to a more complete and informative web page. In the meantime, this web page (unfortunately) remains under construction

2009-07-24

   

First deliverable submitted to the Commission

We have submitted the Quality Plan of the project to the European Commission as project deliverable Del 1.1.  The first deliverable of such a project is always something special, it's kind of the first achivement of the project and thus we are glad to see the project going. 

2009-06-13

   

KickOff meeting in Magdeburg

All four partners have followed the invitation of the University in Magdeburg to join the Kick-Off meeting of the SemSeg project.  We are glad to report that meeting was diven by great motivation to quickly start with the challenging project work. 

2009-06-01

   

Start of the SemSeg project

We have started the SemSeg project as started on 1st of June.  We are fortunate to also have our project team ready right from the start.  With this we look forward to interesting years in this project to come!  ;-)