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ThinkMind // MMEDIA 2013, The Fifth International Conferences on Advances in Multimedia // View article mmedia_2013_1_30_40050


Efficient and Accurate Label Propagation on Large Graphs and Label Sets

Authors:
Michele Covell
Shumeet Baluja

Keywords: graph propagation, large-scale labeling, stabilized bi-conjugate gradient descent, Gaussian elimination, topic discovery, web domains

Abstract:
Many web-based application areas must infer label distributions starting from a small set of sparse, noisy labels. Examples include searching for, recommending, and advertising against image, audio, and video content. These labeling problems must handle millions of interconnected entities (users, domains, content segments) and thousands of competing labels (interests, tags, recommendations, topics). Previous work has shown that graph-based propagation can be very effective at finding the best label distribution across nodes, starting from partial information and a weighted-connection graph. In their work on video recommendations, Baluja et al. [1] showed high-quality results using Adsorption, a normalized propagation process. An important step in the original formulation of Adsorption was re normalization of the label vectors associated with each node, between every propagation step. That interleaved normalization forced computation of all label distributions, in synchrony, in order to allow the normalization to be correctly determined. Interleaved normalization also prevented use of standard linear-algebra methods, like stabilized bi conjugate gradient descent (BiCGStab) and Gaussian elimination. This paper presents a method that replaces the interleaved normalization with a single pre-normalization, done once before the main propagation process starts, allowing use of selective label computation (label slicing) as well as large matrix-solution methods. As a result, much larger graphs and label sets can be handled than in the original formulation and more accurate solutions can be found in fewer propagation steps. We also report results from using pre-normalized Adsorption in topic labeling for web domains, using label slicing and BiCGStab.

Pages: 12 to 18

Copyright: Copyright (c) IARIA, 2013

Publication date: April 21, 2013

Published in: conference

ISSN: 2308-4448

ISBN: 978-1-61208-265-3

Location: Venice, Italy

Dates: from April 21, 2013 to April 26, 2013

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