Learning slow features for behavior analysis

Lazaros Zafeiriou, Mihalis A. Nicolaou, Stefanos Zafeiriou, Symeon Nikitids, Maja Pantic

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    24 Citations (Scopus)
    57 Downloads (Pure)


    A recently introduced latent feature learning technique for time varying dynamic phenomena analysis is the socalled Slow Feature Analysis (SFA). SFA is a deterministic component analysis technique for multi-dimensional sequences that by minimizing the variance of the first order time derivative approximation of the input signal finds uncorrelated projections that extract slowly-varying features ordered by their temporal consistency and constancy. In this paper, we propose a number of extensions in both the deterministic and the probabilistic SFA optimization frameworks. In articular, we derive a novel deterministic SFA algorithm that is able to identify linear projections that extract the common slowest varying features of two or more sequences. In addition, we propose an Expectation Maximization (EM) algorithm to perform inference in a probabilistic ormulation of SFA and similarly extend it in order to handle two and more time varying data sequences. Moreover, we demonstrate that the probabilistic SFA (EMSFA) algorithm that discovers the common slowest varying latent space of multiple sequences can be combined with dynamic time warping chniques for robust sequence timealignment. The proposed SFA algorithms were applied for facial behavior analysis demonstrating their usefulness and appropriateness for this task.
    Original languageUndefined
    Title of host publicationProceedings of the IEEE International Conference on Computer Vision, ICCV 2013
    Place of PublicationUSA
    Number of pages8
    ISBN (Print)1550-5499
    Publication statusPublished - 1 Dec 2013
    EventIEEE International Conference on Computer Vision 2013 - Sydney Conference Centre, Sydney, Australia
    Duration: 1 Dec 20138 Dec 2013

    Publication series

    NameIEEE International Conference on Computer Vision
    PublisherIEEE Computer Society
    ISSN (Print)1550-5499


    ConferenceIEEE International Conference on Computer Vision 2013
    Abbreviated titleICCV 2013
    Internet address


    • HMI-HF: Human Factors
    • EC Grant Agreement nr.: FP7/288235
    • METIS-302865
    • EWI-24261
    • IR-89697
    • EC Grant Agreement nr.: FP7/2007-2013

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