Adaptive tools in virtual environments: Independent component analysis for multimedia

Thomas Kolenda

    Research output: Book/ReportPh.D. thesis

    118 Downloads (Pure)


    The thesis investigates the role of independent component analysis in the setting of virtual environments, with the purpose of finding properties that reflect human context. A general framework for performing unsupervised classification with ICA is presented in extension to the latent semantic indexing model. Evidence is found that the separation by independence presents a hierarchical structure that relates to context in a human sense. Furthermore, introducing multiple media modalities, a combined structure was found to reflect context description at multiple levels. Different ICA algorithms were compared to investigate computational differences and separation results. The ICA properties were finally implemented in a chat room analysis tool and briefly investigated for visualization of search engines results.
    Original languageEnglish
    Publication statusPublished - Sept 2002


    • text
    • multimedia
    • independent component analysis
    • classification
    • image
    • chat room


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