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The Rate Adapting Poisson Model for Information Retrieval and Object Recognition

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons44483

Gehler,  PV
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Gehler, P., Holub, A., & Welling, M. (2006). The Rate Adapting Poisson Model for Information Retrieval and Object Recognition. Proceedings of the 23rd International Conference on Machine Learning (ICML 2006), 337-344.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-D13F-5
Zusammenfassung
Probabilistic modelling of text data in the bag-of- words representation has been dominated by directed graphical models such as pLSI, LDA, NMF, and discrete PCA. Recently, state of the art performance on visual object recognition has also been reported using variants of these models. We introduce an alternative undirected graphical model suitable for modelling count data. This “Rate Adapting Poisson” (RAP) model is shown to generate superior dimensionally reduced representations for subsequent retrieval or classification. Models are trained using contrastive divergence while inference of latent topical representations is efficiently achieved through a simple matrix multiplication.