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Tech Report kmi-98-05 Abstract


Learning Conditional Probabilities from Incomplete Data: An Experimental Comparison
Techreport ID: kmi-98-05
Date: 1998
Author(s): Marco Ramoni and Paola Sebastiani
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This paper reports some experimental results comparing three parametric methods, Gibbs Sampling, EM algorithm and Bound and Collapse, for the estimation of conditional probability distributions from incomplete databases. 1. Knowledge Media Institute, The Open University. 2. Department of Actuarial Science and Statistics, City University.
 
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Multimedia and Information Systems is...


Multimedia and Information Systems
Our research is centred around the theme of Multimedia Information Retrieval, ie, Video Search Engines, Image Databases, Spoken Document Retrieval, Music Retrieval, Query Languages and Query Mediation.

We focus on content-based information retrieval over a wide range of data spanning form unstructured text and unlabelled images over spoken documents and music to videos. This encompasses the modelling of human perception of relevance and similarity, the learning from user actions and the up-to-date presentation of information. Currently we are building a research version of an integrated multimedia information retrieval system MIR to be used as a research prototype. We aim for a system that understands the user's information need and successfully links it to the appropriate information sources, be it a report or a TV news clip. This work is guided by the vision that an automated knowledge extraction system ultimately empowers people making efficient use of information sources without the burden of filing data into specialised databases.

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