Speaker: Sam Hasinoff , University of TorontoContact:
Date: December 18 2007
Time: 11:00AM to 12:00PM
Host: Fredo Durand, MIT - CSAIL - Computer Graphics Group
Britton 'Bryt' Bradley, 617-253-6583, email@example.comRelevant URL: http://www.cs.toronto.edu/~hasinoff/
In this talk I will describe three projects that harness the power
of variable-aperture photography -- capturing multiple photos by
manipulating basic lens controls such as aperture and focus. I will
show that by combining such photos, the information encoded in
defocus can be exploited to achieve a variety of goals.
First, I will describe a new method for computing highly detailed 3D
shape by controlling both the aperture and focus of a lens. This
method is particularly well-suited for scenes with high geometric
complexity, for which standard reconstruction methods can break down.
Second, I will show that we can exploit "aperture bracketing" -- a
one-button operation on most digital SLR's -- to allow refocusing
and other effects in post-capture, all with increased dynamic range.
To achieve this, we compute a layered scene model that
simultaneously accounts for defocus, high dynamic range exposure,
and noise in the input images.
Finally, I will talk about our current work on "light-efficient"
photography, whose goal is to capture photos with the desired level
of defocus in the shortest time possible.
Joint work with Kyros Kutulakos.
Sam Hasinoff received the BSc degree in computer science from the
University of British Columbia in 2000. He is currently a PhD
candidate at the University of Toronto. In 2006, he received an
honorable mention for the Longuet-Higgins Best Paper Award at the
European Conference on Computer Vision. His interests include cross-
country skiing, spicy foods, and amateur photography.
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If you are interested in meeting with Sam Hasinoff during his visit,
please contact Bryt Bradley with your availability.
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