[talks] Z Wang preFPO
Melissa Lawson
mml at CS.Princeton.EDU
Mon May 23 16:35:17 EDT 2011
Zhe Wang will present his preFPO on Friday May 27 at 2PM in Room 402. The
members of his committee are: Kai Li, advisor; Moses Charikar and Olga Troyanskaya,
readers; Jennifer Rexford and Andrea LaPaugh; nonreaders. Everyone is invited to
attend his talk. His abstract follows below.
--------------------------
Title: Designing similarity search systems for multimodal
data
As images, videos and all kinds of non-text sensory data have
taken
the majority of the storage space, how to efficiently
index
and search them becomes an issue. The query by example kind of
content
based search method has become more popular and often can be used
to
compliment the existing search method. We have designed
multiple
search system to demonstrate the content based search capability
and
would discuss our experience about building such
systems.
First we describe VFerret system where we combine the image
visual
feature with audio features for personal video search. Second,
we
explore different aggregation methods to aggregate
results
from multiple features in a system to detect image spam emails. In
the
last system, we design a new method to combine image similarity
search
with product navigation to help user to find desired product in
the
product category
tree.
One of the common problem for the similarity search system is
the
space utilization for the feature vectors used to
represent
objects. Our group had developed sketch as a compact data structure
to
alleviate such problem. In order to use the sketch
effectively,
I have worked out a method to model the sketch and predict the
best
parameters to use given a sample
dataset.
Our experience in integrating the similarity search capability
into
different kinds of system show that the content based search can
be
an effective method to enhance the existing systems. By
creatively
exploit multiple modality from the data, we demonstrate much
better
performance than the traditional systems.
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