Category Archives: VRVis

Recent PhD defense

Today Nicola Pezzotti successfully defended his thesis, Dimensionality-Reduction Algorithms for Progressive Visual Analytics, in Senaatszaal, the Aula. Congratulations to Dr. Pezzotti!

Dr. Pezzotti graduated cum laude for his high-impact work carried out during his study at TU Delft.

Workshop Visual Analytics and Applications

You are all cordially invited to workshop visual analytics and applications, which will take place on 8th of April, from 14:00-17:00 at Pulse-hall 4. Please find detailed program below.

14:00 Jean Daniel Fekete: “Exploring the Evolution of Relationships with Dynamic Hypergraphs”

14:40 Renata Raidou: “Employing Visual Analytics for the Exploration and Prediction”

15:20 Break

15:30 Cagatay Turkay: “Informed computational modelling through visual analytics”

Abstract: With
the increasing availability of computational data analysis and modelling tools
that can be utilised out-of-the-box, the route from data to results is now much
shorter. However, these advancements also come together their own limitations,
and a data scientists need to be aware of the pitfalls and act carefully to
question every observation and method used within each step of the data
analysis process. Visual analytics approaches where interactive visualisations
are coupled tightly with the algorithms offer effective methodologies in
conducting data science in such inquisitive, rigorous ways. This talk will
discuss how visual analytics can facilitate such practices and will look at
examples of research on how data can be transformed and visualised creatively
in multiple perspectives, on how comparisons can be made within different
models, parameters, and within local and global solutions, and on how
interaction is an enabler for such processes.

16:10 Thomas Hollt: Cytosplore: Visual Analytics for Single-Cell Profiling of the Immune System
Recent advances in single-cell acquisition technology have led to a shift towards single-cell analysis in many fields of biology. In immunology, detailed knowledge of the cellular composition is of interest, as it can be the cause of deregulated immune responses, which cause diseases. Similarly, vaccination is based on triggering proper immune responses; however, many vaccines are ineffective or only work properly in a subset of those who are vaccinated. Identifying differences in the cellular composition of the immune system in such cases can lead to more precise treatment. Cytosplore is an integrated, interactive visual analysis framework for the exploration of large single-cell datasets. We have developed Cytosplore in close collaboration with immunology researchers and several partners use the software in their daily workflow. Cytosplore enables efficient data analysis and has led to several discoveries alongside high-impact publications.

16:50 end

Memorial of the 1953 North Sea Flood

A discussion round on Wednesday 30th February was held in the TU Delft Science Center regarding the memorial of the North Sea Flood in 1953. 60 years ago, in the night of 31st January to the 1st February, a large flood hit the southern provinces of the Netherlands (Zeeland, South Holland and parts of Brabant). The flood took the inhabitants by in mid of the night by suprise, causing a death toll of several hundred people.

The discussion round, aiming the memorial of flood as well as future protection against such events, was supported by our 3Di Visualization system. Further information on the memorial is available as an interview of Olivier Hoes, associate professor at the TU Delft and lead scientist- and organisor of the event, an interview by TV West Nieuws of Olivier Hoes, an article in TU Delta on the visualization system and an article the TU newspage with some conclusions on the discussion.

3Di is a research programme in which the TU works together with Deltares and Nelen& Schuurmans on the development of a new generation flood simulation models.

Continue reading Memorial of the 1953 North Sea Flood

Tweakers videoreport on the INSYGHTLAB opening online

Last week, the Tweakers video crew visited the recently opened INSYGHTlab to do a videoreport on the facilities and some of the research that  goes on there. The CGV-group work in the lab was represented by Ioanna Tziouvara and yours truly. I demonstrated Christian Kehl‘s PhD thesis topic: Interactive Visualization and Simulation of Flooding Scenarios on the workbench and Ioanna showed and talked about her master thesis setup: Integration of 3D Tracking systems for Interaction in Spatial Augmented Reality.

Today the full videoreport was posted on the Tweakers website:

Tweakers Videoreport

Viewers with a keen eye can also spot our professor in a couple of the shots!

Master Thesis Defense Ioanna Tziouvara

On the 14th December, Ioanna Tziouvara will defend her Master thesis: Integration of 3D tracking systems for Interaction in Spatial Augmented Reality. The defense is open for the public and guests are therefore invited to attend.

MSc Committee:
Chair, Full Professor: Prof. dr. E. Eisemann, Faculty of EEMCS, TU Delft
Daily Supervisor: Prof. dr. E. Eisemann, Faculty of EEMCS, TU Delft
External supervisor: ir. J. Verlinden, Faculty of IDE, TU Delft
Committee Member: Dr. ir. G. de Haan, Faculty of EEMCS, TU Delft

Date and time: 14 December 2012, 14:30

Location: van der Poelzaal (LB 01.220), Faculty of EEMCS, Mekelweg 4, Delft

Topic preview can be found at the project website.


Spatial Augmented Reality (SAR) has been a research field for more than a decade.  SAR uses digital projectors to augment virtual information on physical objects, which makes it non-invasive and can yield an immersive experience. SAR has shown to have potential in a variety of fields, like entertainment, medicine and industrial applications. Although the opportunities that accompany SAR are great, effort towards the interaction mechanisms is necessary.

In this thesis, a SAR system designed and developed to be applied in the field of Industrial Design Engineering is presented. More specifically, this work contains an approach to set the hardware to support SAR, else known as hardware calibration for SAR. Each hardware entity is calibrated with respect to a common “world” in order to achieve effective communication. This world is set to coincide with the graphics world, and this allows us to imagine being inside the 3D graphics world while the virtual content is rendered onto the scene’s objects. In order to identify the basic ingredients that enable interaction in SAR, a scheme is introduced to help with the analysis of related work. Based on this background knowledge and the newly inserted scheme, we designed the interaction components of our SAR system according to characteristics of our setting. The SAR system was designed to work in the peripersonal region. The user inserts input via a constructed IR tracked pen and a dynamic menu is used as interface to the system. Functionality such as selection, feedback and annotation is enabled for interacting with the SAR system. The system’s application is divided into two parts. The first part includes the use of the RGB-D camera and the IR tracker for the construction of a 3D scanner to produce a virtual model of an object through sampling, segmentation, and registration of sequential point clouds. In the second part, the result of the scanning process, which is a polygonal mesh of the scanned object, is added to the SAR system’s application that enables interaction with virtual models and the ground level of the world. These two parts of the SAR system application aim to support industrial designers in the scanning of a freshly made physical prototype, and enable the design of features on the corresponding virtual model by using the SAR system.

In order to identify the strong points and weaknesses of the current state of the SAR system application, we carried out a user evaluation. 21 students from the Faculty of Industrial Design Engineering evaluated the two parts of the system’s application. The results show that the SAR system is useful and that it has great potential in the field of Industrial Design Engineering. Nevertheless, there is still space for improvement and future work, in order to be fully applied in the field.

Recent M.Sc. Defences

At regular intervals, we will post updates concerning recent master thesis topics and outcomes.

We’ll begin with a description of the work done by Marnix Kraus, MSc. who completed his Master Thesis in the field of active multi-camera navigation in video surveillance systems, supervised by Gerwin de Haan. He designed and evaluated a prototype system for this purpose. His findings indicate that the presented system can enhance operator performance in surveillance control rooms that monitor vast and complex areas. The full thesis can be downloaded here. More information on research related to this topic can be found on the VRLAB project website.

In the game technology department, Rick de Ridder, MSc. worked on simulating urban area development for semantic game worlds for his Master Thesis. This work was supervised by Tim Tutenel and Rafael Bidarra. In his work, he expands a semantic world-generation prototype by introducing factors like resources, events and neighboring settlements in the generation process. It extends current techniques by adding more history and meaning to the procedurally generated cities. The full thesis can be found here and additional information is available on the related Game Technology project website.

Anne van Ee, Msc. developed new interaction schemes for the touch-based organization of patent collections in her thesis work. The thesis was supervised by Gerwin de Haan and it was carried out in co-operation with the European Patent Office. Anne based her work on earlier co-operative work with the European Patent Office and improved the organization system by introducing the Local Affine Multidimensional Projection (LAMP) technique to help the user while searching for patents. If you’re interested in this work, you can check out the full thesis here.

Renata Raidou. MSc. completed her thesis in the field of medical visualization as a Biomedical Engineer. In her work she successfully researched the planning and guidance of minimally invasive cement injection to combat the effects of aseptic loosening that occur after total hip replacement surgery. This work was supervised by Francois Malan and Charl P. Botha. Renata developed an integrated system for planning and guiding minimally invasive refixation. The thesis proposes new approaches to combine CT and fluoroscopy in pre-operative planning. She conducted an extensive review with domain experts to evaluate the system. Her full thesis can be found here.

PhD candidate Christian Kehl receives research poster award at International Supercomputing Conference 2012

Christian Kehl represented the Graphics Group at International Supercomputing Conference (ISC) 2012. ISC is one of the biggest conferences for High-Performance Computing, Grid-Computing and Large-Scale Computations. ISC’12 was held June 1721 at the Congress Center Hamburg.

At the conference Christian Kehl presented a poster on a new project on Interactive Simulation and Visualization of Large-Scale flooding scenarios, placed in the Large-Scale Simulation section. A total of 21 research posters were handed in. The award for best research paper was handed over by Stephan Olbrich, University of Hamburg (Germany). Of particular interest for committee was the massive extent of used data sets and the plan for in-situ simulation and combined visualization.

Copyright picture: UHH,RRZ/MCC, Arvid Mentz

The poster can be reviewed here.

IEEE VR 2012 Workshop on Immersive Visualization

Gerwin de Haan co-organizes the IEEE Virtual Reality 2012 Half-day workshop “Immersive Visualization Revisited” in an attempt to revamp cross-community work in immersive visualization.  The major goal of this workshop is to establish a forum for the presentation and discussion of contemporary cross-community work in immersive visualization. To revive the contact between the nowadays largely separate communities of visualization and Virtual Reality, the workshop will contain technical paper presentations but also panel sessions and break-out discussion groups with (former) experts from research and industry. The organizers invite you to submit your work (technical short papers, position papers, Feb 10th) , and join the discussion early March at IEEE VR 2012, Orange County, CA, USA. For more info, see:

Frits Post receives Visualization Career Award

We are proud to announce that Frits Post received the IEEE VGTC Visualization Career Award. At VisWeek 2011, the annual IEEE Visualization conference held 23-28 October in Providence, RI, he received his award. With this award, the international visualization community recognises his outstanding contributions to the research field, and flow visualization in particular. In his acceptance speech, Frits briefly discussed his 20+ years in the visualization field and expressed his gratitude for great collaborations in several organizational committees, and for the PhDs he supervised from 1989 through 2011. Earlier this year, Post also received the Eurographics Honorary Fellowship from the European association for computer graphics. Frits Post, now officially retired, indicated he will continue to visit the Computer Graphics and Visualization group at Delft University of Technology regularly to advise on ongoing research.

(Update: here is the accompanying award text and a snapshot of the award plaque itself)

Frits Post receives Visualization Career Award at Visweek 2011

Cloudviewer overlays 3D data on Google Maps

We released a public demonstration of the TUDelft Cloudviewer, a system that allows exploration of large 3D geo datasets directly from the web browser. As a final project for our Minor 3D Virtual Earth, a group of four students used our pre-processing and rendering systems to script a virtual camera, which generates tens of thousands oblique (or “birds-eye”) image tiles for various zoom-levels and view angles. These resulting tiles are placed on a web server so they can be shown as a layer in Google Maps, including oblique viewing angles and rotating view orientation. This makes the exploration of 3D point clouds almost as impressive as on our visualization systems, but now over the web for everyone to enjoy!