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Ambiguity modeling in latent spaces
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2008 (English)In: MACHINE LEARNING FOR MULTIMODAL INTERACTION, PROCEEDINGS / [ed] PopescuBelis, A; Stiefelhagen, R, BERLIN: SPRINGER-VERLAG BERLIN , 2008, 62-73 p.Conference paper (Refereed)
Abstract [en]

We are interested in the situation where we have two or more representations of an underlying phenomenon. In particular we are interested in the scenario where the representation Lire complementary. This implies that a single individual representation is not sufficient to fully discriminate a specific instance of the underlying phenomenon, it also means that each representation is an ambiguous representation of the other complementary spaces. In this paper we present a latent variable model capable of consolidating multiple complementary representations. Our method extends canonical correlation analysis by introducing additional latent spaces that Lire specific to the different representations, thereby explaining the full variance of the observations. These additional spaces, explaining representation specific variance, separately model the variance in a representation ambiguous to the other. We develop a spectral algorithm for fast computation of the embeddings and a probabilistic model (based on Gaussian processes) for validation and inference. The proposed model has several potential application areas, we demonstrate its use for multi-modal regression on a benchmark human pose estimation data set.

Place, publisher, year, edition, pages
, Lecture Notes in Computer Science, ISSN 0302-9743
Keyword [en]
National Category
Computer Vision and Robotics (Autonomous Systems)
URN: urn:nbn:se:kth:diva-50656DOI: 10.1007/978-3-540-85853-9-6ISI: 000259923700006OAI: diva2:462375
5th International Workshop on Machine Learning for Multimodal Interaction. Utrecht, NETHERLANDS. SEP 08-10, 2008
QC 20111208Available from: 2011-12-07 Created: 2011-12-07 Last updated: 2011-12-08Bibliographically approved

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Ek, Carl Henrik
Computer Vision and Robotics (Autonomous Systems)

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