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The Visual Computing Forum, or VCF, is a
series of seminars organized by the visualization
group with selected talks from the fields of
visualization, image processing, computer graphics,
and so on. The individual seminars are arranged
approximately once a month, on Fridays from 11am to
12am, and they will be interleaved with the MedViz seminars.
They will be held either at the Høyteknologisenteret
or at the VilVite
Science Center. If you wish to be informed about upcomming VCF events, please write an e-mail to "vcf.bergen@gmail.com", "Helwig.Hauser@UIB.no" or "Sergej.Stoppel@UIB.no".
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14 December 2012
VCF and MedViz Joint Seminar
Speakers: Ragnar Nortvedt (MedViz program manager) and Ivan Viola (Dept. of Informatics, UiB)
Place: Møterom 9.1 and 9.2, Laboratoriebygget 9 etg., Haukeland University Hospital
Time: Friday 14 December 2012, from 12.00pm to 1.00pm
Talk 1: The Laboratory Fish - image analyses along the route to implement translational research
The present talk will give some examples of image analysis from the
previous millennium, starting with two perpendicular oriented cameras
to quantify fish swimming speed, proceeding with quantification of
muscle contraction, segmentation of muscle anomalies and visualizing
body composition of fish.
The laboratory fish can serve as a model in translational research.
Although fish will probably never replace mammals as experimental
animals, they can substitute for mammals in certain stages, e.g. of
carcinogenicity testing experiments using fish can be more sensitive,
conducted more rapidly, and more economical than experiments using
mammals.
From my own research background I foresee that future medical imaging
can base some of the experiments on basic biological research,
combining several imaging technologies and latent variable projections
to extract crucial information and model medical responses from a
multitude of images. This can only be achieved by an even closer
co-operation by the scientists in the MedViz cluster.
Talk 2: Exciting Years with Ultrasound et al.
Medical ultrasound is in the recent years experiencing a rapid
development in the quality of real-time 3D ultrasound imaging. Image
quality of the 3D volume that was previously possible to achieve within
the range of few seconds is now possible to achieve in a fraction of a
second. This technological advance offers entirely new opportunities
for the use of ultrasound in clinics. In my talk, I will discuss
several enabling visual computing technologies such as image
registration, filtering, segmentation, and visualization, developed in
the course of the IllustraSound project that together give the
ultrasound new potential for the use in clinical environment.
Additional material:
Flyer,
MedViz webpage
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9 November 2012
Thematic Zonation and Text Visualisation
Speaker: Brit Hellw Aarskog (Dept. of Informatics, UiB)
Place: Auditorium, VilVite Science Center
Time: Friday 9 November 2012, from 10.15am to 11.15pm
Abstract:
Brit Helle Aarskog will present some central issues concerning thematic
text zonation and procedures that determine named entities within these
zones, thus providing data about the named entities' contextual scene.
A text zone constitutes a group of textual units with a certain number
of shared features on lexical level, grammatical level, semantic level,
and/or pragmatic level (statistics as dispersion values, mutual
information score, keyness of keyness, etc.). A zonation procedure
basically performs an advanced cluster analysis. The critical issue is
to determine the threshold values for similarity scores. Thematic text
zones are continuous, discontinuous, and overlapping with reference to
the various levels of similarity.
When it comes to text visualisation, this is simply an open question
which has not been considered into detail. However, we have some basic
ideas about for instance 'elevating' text zones with verbs mainly in
the present tense, colour schemes for thematic zones (text spans with a
high density of certain thematic indicators), and more wild ideas about
how the user can select between several options for visualisation of
textual patterns.
Additional material:
Flyer
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4 October 2012
Medical Visualization Day
Place: VilVite Center
Time: Thursday 4 October 2012, from 9.00am to 5.00pm
Program:
In the morning session, 9:00, Veronika Solteszova will be given the
opportunity to defend her PhD thesis. The evaluation committee consists
of Prof. Petter Bjørstad and evaluators Prof. Anna Vilanova from
Eindhoven University of Technology, The Netherlands, and Prof. Anders
Ynnerman from Linköping University, Sweden. The defense will be
followed by a small reception.
In the afternoon the VisGroup Bergen organizes a Mini-Symposium on
Medical Visualization. The thesis evaluators, renowned medical
visualization researchers, have kindly accepted to give a talk as part
of the mini-symposium. Moreover, we proudly host other speakers, who
have shared their knowledge, experience, and technology with us, and
not at the least with, Veronika Solteszova, the PhD candidate.
Veronika's work has been inspired by illustration and visual arts and
Veronika was during her studies in a frequent exchange with
professional medical illustrator Kari Toverud. You might know that Kari
illustrated the entire first, and upcoming second, edition of the
Menneskets Fysiologi texbook. Veronika was also often given data and
feedback from the medical ultrasound industry, and Erik Steen principal
engineer GE Vingmed Ultrasound will share with us current trends and
future challenges in ultrasound technology. Furthermore we are happy
that Edi Gröller, Adjunct Professor at the Department of Informatics,
UiB, has also agreed to present latest medical visualization work from
Vienna University of Technology.
Additional material:
Flyer,
MedViz webpage
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14 September 2012
The Iterative Process of Interactive Visual Analysis
Speaker: Helwig Hauser (Dept. of Informatics, UiB)
Place: Room 2143, 2nd floor, HiB (data blokk), Thormøhlensgate 55
Time: Friday 14 September 2012, from 10.15am to 11.15am
Abstract:
One central characteristic of our information age is that increasingly
often we should exploit the wealth of available data for the sake of
learning, decision making, as well as other tasks. A promising approach
- not at the least also targeted by visual analytics - is to integrate
the strengths of computers (fast computation, efficient handling of
large datasets, comparably low costs, etc.) with the strengths of the
users (perceptual capabilities, considering domain know-ledge,
detecting the unexpected, etc.). In this talk, we look at one possible
solution, i.e., the concept of interactive visual analysis, and
describe it as an iterative process, enabling the integration of
computational and interactive means for data exploration and analysis.
We consider a data scenario that opposes dependent and independent data
dimensions (like in a table), general enough to match many different
application cases. We focus on the case of multivariate data, but also
address the case of high-dimensional data and opportunities for
exploring and analyzing such data. After all, we think of interactive
visual analysis as an iterative process, where each step is performed
on the basis of a toolbox with computational and interactive visual
solutions.
Additional material:
Flyer,
Prof Hauser's webpage
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18 June 2012
Holidays
The VCF seminar series will start again after the summer.
The first seminar of the next academic year will be on September 14.
We would like to thank all the speakers and all the participants, and
we really hope you enjoyed the seminars. We wish a good summer to all
of you!
The Visualization Group
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15 June 2012
VCF + MedViz Summer Final
Place: Galeasen Loyal, Leaving from Bradbenken
Time: Friday 15 June 2012, from 12.30pm (sharp!) to 15.30pm
Program:
1) Science and Networking, Promises and Challenges (Kenneth Hugdahl, 20
min.)
2) Selected Bergen Activities related to Visual Computing (Helwig
Hauser, 20 min.)
3) MedViz Highlights and Future Aspects (Odd Helge Gilja, 20 min.)
Limited number of places, to register send an e-mail to
elin.riple@med.uib (subject "MedViz-VCF seminar June 15 - VCF registration")
no later than June 12!
Additional material:
Flyer,
MedViz webpage,
Galeasen Loyal webpage
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11 May 2012
Use of Visualization in Bioinformatics - Challenges and Opportunities
Speaker: Inge Jonassen (UiB, Uni Computing, Uni Research)
Place: Room 3137, floor 3, HIB (data blokk), Thormøhlensgate 55
Time: Friday 11 May 2012, from 11.00am to 12.00am
Abstract:
Bioinformatics is the application of computer science and information
technology to the field of biology and medicine. Many applications of
bioinformatics aim to extract information and gain insight from data.
In experimental projects, a biological question is addressed by
designing an experiment generating data that allows testing a
hypothesis or extracting patterns relating to underlying biology. Data
generated within one project should be interpreted in context of
knowledge accumulated in the field and represented in biological
databases or in the scientific literature. In order to help
understanding it is highly useful to represent data and patterns using
visualization techniques and statistics are essential to test whether
identified patterns are likely to occur by chance. In this talk I will
discuss how visualization including information visualization can be
utilized to aid in understanding bioinformatics data and methods.
Additional material:
Flyer,
Inge Jonassen's webpage,
Uni Computing webpage
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13 April 2012
Computational Sciences at Uni
Computing: Current Activities
and Future Plans
Speaker: Dr. Klaus Johannsen
Place: Room 3137, floor 3, HIB (data blokk), Thormøhlensgate 55
Time: Friday 13 Apr 2012, from 11.00am to 12.00am
Abstract:
Uni Computing is a department of Uni Research, the research company of
the University of Bergen. The department carries out research and
development in basic and applied areas with a focus on computational
techniques: Bio-informatics, computational linguistics and ecology and
environmental flow mechanics. It furthermore develops and operates
(corresponding) IT-solutions and e-infrastructures for the department,
Uni Research, UiB, a.o.
In this presentation we will give an overview over the current
activities and discuss some of the department's future plans. We will
highlight the current and future needs regarding computational
resources, data analysis and post-processing and will discuss in which
way visualization is or could be of interest for our activities.
Additional material:
Flyer,
Dr. Johannsen's webpage,
Uni Computing webpage,
Slides
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9 March 2012
Visualizing Human Physiology: an Overview
Speaker: Paolo Angelelli
Place: Room 3137, floor 3, HIB (data blokk), Thormøhlensgate 55
Time: Friday 9 Mar 2012, from 11.00am to 12.00am
Abstract:
For many years, medical visualization has focused on human anatomy.
Comparably recent innovations in the fields of medical imaging,
modeling and simulation made the generation of data related to
physiological processes in the human body possible. Due to the
complexity of this data, new visualization techniques have been
proposed and employed, which go beyond the previous anatomy
visualization methods. This talk will provide an overview of the
current state of the art in the visualization of human physiology.
Additional material:
Flyer,
Slides
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10 February 2012
Visualization in Geophysics - recent advances in seismic volume rendering
Speaker: Daniel Patel
Place: Room 3137, floor 3, HIB (data blokk), Thormøhlensgate 55
Time: Friday 10 Feb 2012, from 11.00am to 12.00am
Abstract:
The talk will touch upon topics such as:
1) Ground truth visualization of measured seismic data.
2) Automated object extraction for getting computer assistance in
segmenting important structures in the seismic data such as horizons
and faults.
3) Fast GPU-creation, visualizing and visual fusion of multiattribute
seismic data.
Additional material: Flyer,
Slides
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20 January 2012
Graph, cuts and PDE minimization for image processing
Speaker: Professor Xue-Cheng Tai
Place: Room 3137, floor 3, HIB (data blokk), Thormøhlensgate 55
Time: Friday 20 Jan 2012, from 11.00am to 12.00am
Abstract:
A network can often be represented as a graph. Max-flow/min-cuts over a
given graph can be used to find optimal solutions for many complicated
network problems. It is known that these kind of problems are often
NP-hard and they pose some very challenging minimization problems for
simulations. In this talk, we will show how to use graph and cuts
methods for some image processing and computer vision problems.
Especially, we shall present our recent work extending the concept of
max-flow/min-cuts to "networks" that are infinite dimension, i.e we
will talk about continuous max-flow/min-cuts problems. When we
discretize these continuous max-flow problems, we come back to the
ordinary finite dimension max-flow problems. The continuous max-flow
models can be solved through the solution of some partial differential
equations. One advantage of the continuous max-flow problem is that we
can use many convex optimization methods to solve it. We are released
from some restricted searching algorithms for network problems.
Additional material: Flyer,
Professor Xue-Cheng Tai webpage,
Slides
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VCF seminars in
2017,
2016,
2015,
2014,
2013,
2012,
2011
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