Category Archives: Colloquia

CGV Colloquium – Thursday April 9th

You are cordially invited to attend our next Computer Graphics and Visualization (CGV) Colloquium, which will be held on Thursday April 9, 2015, 15.45-17.20, in the Dijkstraroom (HB09.150). The program this month features the following speakers:

  • Mattijs van Driel:
    • Title – Real time intersections on  Space Scale Cube data
    • Abstract – The space scale cube (SSC) model offers a new way of encoding 2D geographic data with continuous level of abstraction on the Z axis. It lacks a flexible way of visualizing intersections, which is what this work offers at its core. A SSC based dataset is preprocessed into a simple octree structure, which is then used as input for an interactive rendering system that provides a user controllable intersection surface. The system uses the octree structure to cull unnecessary chunks, and OpenGL to render the intersections themselves. In addition to rendering intersections, the approach allows for a number of enhancements on the final image, such as antialiasing and transition colorization.
  • Rob Coorens:
    • Title – Quantification of deformation and sliding of orbital fat during rotation of the eye Short
    • Abstract – When the eye rotates, the muscles contract and move through the orbital fat. This movement is a combination of sliding through the fat and deformation of the fat. The goal of the project is to quantify both types of movement from MRI data of the orbit using registration and segmentation techniques.

As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series. All other interested colleagues are more than welcome, so feel free to disseminate this announcement. Looking forward to see you all at the colloquium!

CGV Colloquium – Thursday February 19th

You are cordially invited to attend our next Computer Graphics and Visualization (CGV) Colloquium, which will be held on Thursday February 19, 2015, 15.45-17.20, in the Vassiliadis room (HB10.230).

The program this month features the following speakers:

  • Kevin Allain: Visualizing dynamic networks with matrix cubes
  • Hongjie Lee: Active shape model for facial detection and medical image analysis
  • Panchamy Krishnan: Random forests in X-ray segmentation
  • Jean-Baptiste Doyon: Refinement of lung nodule candidates based on local geometric shape analysis and Laplacian of Gaussian kernels

As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series. All other interested colleagues are more than welcome, so feel free to disseminate this announcement. Looking forward to see you all at the colloquium!

CGV Colloquium – Wednesday December 16th

You are cordially invited to attend our next Computer Graphics and Visualization (CGV) Colloquium, which will be held *tomorrow* Tuesday, December 16th, 2014, 15.45-17.00, in the Dijkstra room (HB9.150).

The program this month features the following speakers:

  • Vincent Hogendoorn: Image-based façade modeling
  • Antony Löbker: Image completion using large image collections

All interested colleagues are more than welcome, so feel free to disseminate this announcement. As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series. Looking forward to see you at the colloquium!

CGV Colloquium – Thursday December 11th

We would like to invite you to a special CGV colloquium on the 11th of December at 15:45 – 17:15 (see details below). The colloquium will be held in the Dijkstrazaal (HB 09.150) and will feature two invited talks by guest speakers: 

image003Prof. Dr.-Ing. Bernhard Preim

Title: Visual Analytics in Cohort Study Data

Abstract: Epidemiology aims at understanding relations between life style, genetics, environmental factors and the outbreak of diseases.

Recent large scale cohort studies involving a wealth of sociodemographic data and medical image data bear a great potential to identify complex interactions between different factors and non-linear relations between risk factors and the likelihood and severity of diseases. A combination of data analysis (dimensionality reduction and clustering), image analysis (segmentation and quantification of target structures) and interactive visualization supports the generation of new hypothesis.

As case study, we discuss back pain and its relation to socio-demographic and medical image data. The epidemiological data is part of the SHIP ( http://www.medizin.uni-greifswald.de/cm/fv/english/ship_en.html). 

image005

Prof.dr. Jos Roerdink

Title: Brain Patterns: Prediction of Neurodegenerative Diseases

Abstract: In this talk, I will discuss some recent work on the visualization and analysis of brain patterns obtained from neuroimaging data, and their use in the understanding of brain (mal)functioning.

The recently GLIMPS (“GLucose IMaging in ParkinsonismS”) project at the University of Groningen concerns the creation of a national database of FDG-PET scans which reflect the glucose consumption of the brain in patients with neuro-degenerative diseases. The goal is to identify distinctive structural and functional brain patterns and derived quantities like network patterns of brain activity, which display statistically significant differences in healthy subjects and patients with certain types of neuro-degenerative disease. The database will be used for clinical practice as well as for research purposes. Pattern classification and visualization methods will be developed to associate brain patterns to various types and stages of neuro-degenerative disease. First results will be shown and discussed.

CGV Colloquium – Thursday November 27nd

You are cordially invited to attend our next  Computer Graphics and Visualization (CGV) Colloquium, which will be held on Thursday, November 27, 2014, 15.45-17.00,
in the Vassiliadis room (HB10.230).

The program this month features the following speakers:

  • Kristinn Rúnarsson:  Animosaics
  • Bas Dado:  Sparse voxel directional acyclic graphs for geometry
  • Stefan Ohrhallinger and Mohamed Radwan:  Surface reconstruction from sparsely sampled point clouds

All interested colleagues are more than welcome, so feel free to disseminate this announcement. As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series. Looking forward to see you all at the colloquium!

MSc thesis successfully defended

On the 10th of October, Lennaert van den Brink successfully defended his thesis “HiveArcs – visualizing genome co-expression data“. In his work, he introduced HiveArcs, an interactive online visual analysis for genome co-expression data. HiveArcs visualizes modules using arc diagrams on radially placed axes. Using this lay-out accommodates display of per-gene tracks of additional information as well as relationships between modules. This allows for quick and intuitive comparison between modules as well as in depth analysis of a single module.

HiveArcs - Visualizing genome co-expression data
The HiveArcs layout with 1) the module glyps, 2) arc diagrams, 3) gene tracks and 4) module tracks.

We would like to congratulate Lennaert with his work and defense and wish him all the best for the future!

CGV Colloquium – Thursday October 16th

You are cordially invited to attend our next Computer Graphics and Visualization (CGV) Colloquium, which will be held on Thursday October 16, 2014, 16.15-17.00 (THUS LATER THAN USUAL) in the Vassiliadis room (HB10.230).

The program this month features the following speakers:

  • Gerard Simons: Visualizing the Rendering Process
  • Selmar Kok: Water Flow Visualization: Realistic Flow from Coarse Data

All interested colleagues are more than welcome, so feel free to disseminate this announcement. As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series.

Looking forward to see you all at the colloquium!

CGV Colloquium – Thursday September 18th

You are cordially invited to attend our next Computer Graphics and Visualization (CGV) Colloquium, which will be held on Thursday September 18, 2014, 15.45-17.00, in the Vassiliadis room (HB10.230).

The program this month features the following speakers:

  • Bas in het Veld: Procedurally generating worlds for storytelling
  • Benny Onrust: Procedural ecosystem generation using ecological models
  • Daniel van der Ende: High Dimensional Clustering for Data Stream Visualization

All interested colleagues are more than welcome, so feel free to disseminate this announcement. As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series.

Looking forward to see you all at the colloquium!

Two MSc theses successfully defended

Korijn van Golen and Matthijs Neven successfully defended their theses in our group recently.

Landmark Influence VisualizationLandmark Influence Visualization
Landmark Influence Visualization

On Tuesday, the 8th of July, Korijn defended his thesis “Landmark Influence Visualization in Active Shape Models”. In his work he introduced a novel landmark influence visualization that improves the usability of Active Shape Models. Landmark influence is defined as the change the model fit will undergo if a landmark is removed. The landmark influence is visualized using disk glyphs around landmarks. A region-of-interest filter can be used to inspect influence on local regions. Distance maps and animations visualize how the shape will change.

Remote Rendering interface
Remote Rendering interface

On Friday, the 22nd of August, Matthijs defended his thesis “Interactive Remote Rendering”. In his work, he present an interactive remote volume-rendering system that tries to bridge the gap between complex medical volume data and the patient. The user can easily upload their own data, which they receive from the clinician after a scan, which they can then visualize. The application does not require any medical or volume visualization background, and can run from any device with a working internet connection and an internet browser.

We’d like to congratulate Korijn and Matthijs with their Master of Science titles!

CGV Colloquium – Thursday July 10th

You are cordially invited to attend our next Computer Graphics and Visualization (CGV) Colloquium, which will be held on Thursday July 10, 2014, 15.45-17.00, in the Vassiliadis room (HB10.230).

The program this month features the following speakers:

  • Ioannis Tolios – Visual exploration and analysis of DCE-MRI using a combined semi-quantitative and quantitative approach
  • Antoine Plat – Processing upper airway endoscopic videos for sleep apnea diagnostics
  • Melos Gebrekrstos – Visualization of sleep and circadian alignment

All interested colleagues are more than welcome, so feel free to disseminate this announcement.  As a reminder, all CGV MSc students (both seminar and thesis project) are expected to attend our monthly colloquium series.

Looking forward to see you all at the colloquium!