[Colloquium] Reminder: Zhang/MS Presentation/Mar 31, 2015

[Margaret Jaffey]

This is a reminder about Liwen's MS Presentation tomorrow.

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Date:  Tuesday, March 31, 2015

Time:  12:00 PM

Place:  Ryerson 276

M.S. Candidate:  Liwen Zhang

M.S. Paper Title: Jointly Learning Multiple Similarity Metrics from
Triplet Constraints

Abstract:
The measure of similarity plays a crucial role in many applications
such as content-based recommendation, image search and speech
recognition. Similarity between objects is multifaceted and it is
easier to judge similarity when the focus is on a specific aspect. We
consider the problem of mapping objects into view specific embeddings
where the distance between them is consistent with the similarity
comparisons of the form "from the t-th perspective, object A is more
similar to B than to C". We propose a framework to jointly learn
multiple views by deploying different similarity metrics in a unified
embedding space. Our approach is a natural extension of the view-wise
independent approach and is capable of exploiting the correlation
between the views if it exists. Experiments on a number of datasets,
including a large dataset of multi-view crowdsourced comparisons on
bird images, show the proposed method achieves lower triplet
generalization error and better grouping of classes in most cases,
when compared to learning embeddings independently for each view or
learning a single embedding from triplets collected on all views. More
specifically, on datasets where correlation between views is strong,
the proposed method achieves significant improvement, while on dataset
with limited view correlation, it still performs no worse than its
independent learning counterpart.

Liwen's advisors are Prof. Anne Rogers and Prof. Ryota Tomioka

Login to the Computer Science Department website for details:
 https://www.cs.uchicago.edu/phd/ms_announcements#liwenz

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Margaret P. Jaffey            margaret at cs.uchicago.edu
Department of Computer Science
Student Support Rep (Ry 156)               (773) 702-6011
The University of Chicago      http://www.cs.uchicago.edu
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