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
If you wish to be informed about upcomming VCF events, please write an e-mail to "firstname.lastname@example.org", "Helwig.Hauser@UIB.no" or "Sergej.Stoppel@UIB.no".
April 7th, 2017
Title: Abstraction in Non-Photorealistic Rendering and Illustrative Visualizations
Speaker: Tobias Isenberg
Place: Lille auditorium (208N2), 2rd floor Høyteknologisenteret
Time: Friday April 7th, 2017, from 10:15am to 11:00am
Abstraction is a concept that is fundamental in both non-photorealistic rendering (NPR) and (illustrative) visualization.
In NPR, abstraction is introduced by choosing a subset of elements to depict, by simplifying the depicted elements, by
choosing a particular style of depiction, or by even changing the underlying geometric model. Here, abstraction typically
serves an aesthetic goal. In illustrative visualization, abstraction is often used to emphasize important parts and
de-emphasize less important ones. Traditionally, however, most authors argue that by simply using an NPR style or by
using methods from illustrative rendering they automatically abstract---only few approaches actually discuss how the
abstraction is introduced, what types of abstraction exist, and how abstraction can be controlled.
I will discuss three approaches that not only rely on abstraction but also allow users to control it. First, I will
discuss an approach for the abstraction of visualizations of molecular structures in which a continuous abstraction
space between structural abstraction, abstraction through spatial perception, and abstraction by means of "illustrativeness"
is created. Users can navigate this space to adjust visualization to their specific needs. Then I will talk about the
abstraction of brain connectivity though the contraction of fiber tracks based on local similarity. And finally, I will
discuss an example from NPR in which different abstraction strategies are used to affect map data in order to create an
abstract map representation that is guided by each person's individual aesthetics.
March 10th, 2017
Title: Weather and Climate, a Playground for Big Data and Visualisation
Speaker: Thomas Spengler
Place: 302O2, 3rd floor Høyteknologisenteret
Time: Friday March 10th, 2017, from 10:15am to 11:00am
Weather and climate science is among the most demanding in terms of challenges for computation and data.
Terabytes of data are produced every day for operational forecasting, but at the end most people are only
interested in a few symbols on their favourite weather app worth a few kilobytes. I will touch on the
principles of weather forecasting and the computational demands and challenges for data input and transfer.
In particular, I will also focus on current research questions with respect to storm development and
state-of-the-art analysis techniques, including feature detection and data reduction using theoretical
assessments of the flow evolution.
I will also highlight challenges in visualising our conceptual understanding of the workings of
the weather and point to open questions regarding best use of the available data given the current
research questions, also with respect to ensemble prediction. As an outlook, I will also touch on data
availability at our institute for possible collaboration and close with open questions from the atmospheric science side.
February 10th, 2017
Title: Content Delivery for Tomorrow: From Vibrotactile Notifications to Mid-Air Displays
Speaker: Morten Fjeld
Place: 302O2, 3rd floor Høyteknologisenteret
Time: Friday February 10th, 2017, from 10:15am to 11:00am
Vibrotactile notifications can be supportive as our visual attention is often overtaxed,
both in mobile and fixed settings. In the first part of this talk, we investigate how users
perceive spatiotemporal vibrotactile patterns on the arm, palm, thigh, and waist. Results of
the first two experiments indicate that precise recognition of either position or orientation
is difficult across multiple body parts. Nonetheless, users were able to distinguish whether
two vibration pulses were from the same location when played in quick succession. Based on
this finding, we designed eight spatiotemporal vibrotactile patterns and evaluated them in
two additional experiments. In the second part of this talk, we present HaptiColor, an
assistive wristband that encodes discrete color information into spatiotemporal vibrations
to support colorblind users to recognize and compare colors. In the third part of
this talk, we speculate around how advances in display technologies could soon make wearable
mid-air displays—devices that present dynamic images floating in mid-air relative to a mobile user—available.
VCF seminars in