The supervised IBP: neighbourhood preserving infinite latent feature models

Quadrianto, Novi, Sharmanska, Viktoriia, Knowles, David A and Ghahramani, Zoubin (2013) The supervised IBP: neighbourhood preserving infinite latent feature models. Published in: Nicholson, Ann and Smyth, Padhraic, (eds.) Proceedings of the 29th Conference on Uncertainty in Artificial Intelligence; Washington, United States; 12-14 July 2013. 527-536. Association for Uncertainty in Artificial Intelligence ISBN 9780974903996

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We propose a probabilistic model to infer supervised latent variables in the Hamming space from observed data. Our model allows simultaneous inference of the number of binary latent variables, and their values. The latent variables preserve neighbourhood structure of the data in a sense that objects in the same semantic concept have similar latent values, and objects in different concepts have dissimilar latent values. We formulate the supervised infinite latent variable problem based on an intuitive principle of pulling objects together if they are of the same type, and pushing them apart if they are not. We then combine this principle with a flexible Indian Buffet Process prior on the latent variables. We show that the inferred supervised latent variables can be directly used to perform a nearest neighbour search for the purpose of retrieval. We introduce a new application of dynamically extending hash codes, and show how to effectively couple the structure of the hash codes with continuously growing structure of the neighbourhood preserving infinite latent feature space.

Item Type: Conference Proceedings
Schools and Departments: School of Engineering and Informatics > Informatics
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics
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Depositing User: Novi Quadrianto
Date Deposited: 24 Feb 2014 14:40
Last Modified: 16 Jun 2017 13:17

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