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The Imager
meetings are held at 12:30-2:00pm every other Wednesday in MCML building
room 256 (across from CICSR building) and are comprised of a
supposedly short discussion of lab operations and then a technical
presentation. The technical presentations are presented first on a need
and then a rotational basis. Everyone
in the lab is expected to take their turn presenting.
Duties of Chair
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Post meeting reminder and abstract of
technical presentation to ubc.cs.imager a day or two before the
meeting.
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Stop faculty from rambling aimlessly.
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Take and post minutes.
Technical Presentations
A
technical presentation is a talk about anything related to computer
graphics, HCI, or visualization. This talk can be as short and informal as you
like. Please note that "I have nothing to present" is
not a valid excuse for not giving a
presentation. There is no need to stress out over your talk; just have fun
with it! Some tried and true technical presentation topics include:
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a course project that involves graphics, HCI, or
visualization
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a review of a paper or papers
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a half-baked idea that needs roasting
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paper presentation dry run
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M.Sc
. presentation
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Ph.D. proposal dry run
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Ph.D. defense dry run
Technical presentations
are about 20 minutes long with a 10 minute question and answer session
afterwards. Really technical presentations should start with a 5-10 minute
introduction that everyone in the lab should be able to understand.
When Attending a Technical Presentation
When attending a technical
presentation, it is important to be as supportive to the speaker as you
can. Don't forget, many of our lab members are relatively inexperienced
public speakers; it does not do them any good to be overly critical on
minor points.
When Do I Give a Technical Presentation?
See the
schedule below. But if you want to give a presentation before your turn
comes, just email (vlady@cs.ubc.ca) and
I'll schedule your talk. Except for dates marked with asterisks, the
following schedule is somewhat flexible and is based on a
longest-time-since-last-presentation rotation. After giving a talk, you
drop to the bottom of the list.
Schedule of Chairs and
Technical Presentations
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Date
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Chair
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General Information
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September 15
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Vladislav Kraevoy
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Technical Presentation:
Robert Bridson presented a new sci-fi horror movie made by his animation class
students.
Agenda items:
1.
Discussed the issue of Imager meeting conflict with Michiel's grad animation course. Unanimously decided
that Michiel is not important.
2.
Lavana
brought up Siggraph reimbursements.
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September 29
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Fred Kimberley
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Technical Presentation:
Presenter:
Fred Kimberley
Title:
Low Dimensional Search for Efficient Texture Synthesis
Abstract: Most current pixel-based texture synthesis algorithms select the
value of the pixel to be synthesized by using a high dimensional (typically
100-300 dimensions) approximate nearest neighbour (ANN) search.Nearest neighbour search in high
dimensions is sucky.It is very computationally expensive and
has questionable usefulness.We
present an algorithm that selects a small subset of the dimensions and
performs an ANN search in this lower dimensional space.This results in a faster search with more
meaningful results.In addition we
perform most of the distance calculation as a preprocess
so that very little computation has to be done at runtime.
Agenda items:
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October 13
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Andrew Chan
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Technical Presentation:
Presenter:
Andrew Chan
Abstract:
Collaboration is taking place increasingly between individuals living in different
cities, countries, or continents. Instead of relying on time-consuming,
expensive, and exhausting business travel, companies are turning to web
conferencing systems, Internet-based systems that support distributed
meetings, training, and collaboration. These systems support
/view-sharing/, where an individual can share an application with his or
her collaborators, allowing them to view and interact with the application
in real-time. While flexible, these systems only permit one user to control
the application at a time, necessitating a turn-taking protocol. Current
web conferencing systems depend heavily on visual elements like dialog
boxes or tool-tips to deliver messages such as requests for control.
However, the collaborative tasks being performed are typically highly
visual in nature themselves, meaning that messages can either intrude or be
missed. Another shortcoming of current systems is that they fail to support
flexibility in requesting control, something we take for granted in
face-to-face collaboration.
In this thesis, we introduce a novel
urgency-based turn-taking protocol, where users can request control with
two levels of urgency or immediately take control. Haptic icons,
touch-sense stimuli that have been assigned a meaning, are used in this
protocol to periodically inform a user of the current turn-taking state.
Our research was conducted in three phases. First, we designed the protocol
and selected a set of haptic icons. Next, we evaluated the ability of
subjects to learn the haptic icons and identify them under different
amounts of cognitive workload. Finally, we recruited groups of subjects to
use the protocol in a collaborative environment and evaluated their
performance.
Our results show that haptic feedback is
a viable channel for communicating turn-taking information. The haptic
icons can be learned in a reasonable amount of time and recalled with high
accuracy. As well, users in control are more responsive to requests for
control and control is shared ore equally among group members when haptic
feedback is present. The urgency-based protocol also shows promise when
used with haptic feedback.
Agenda items:
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October 27
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Vladislav Kraevoy
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Technical Presentation:
Presenter:
Dan Archambault
Title: Hierarchical Graph Layout by Topological
Features
Agenda items: TBA
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November 10
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TBA
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TBA
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November 24
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TBA
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TBA
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December 01
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TBA
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TBA
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