Temporal phase unwrapping is a method of analyzing fringe patterns in which the fringe phase, /spl Phi/, at each pixel is measured and unwrapped as a function of time, t. We propose a method for improving the signal-to-noise ratio of the total phase change by incorporating data from the intermediate phase values. The performance of the method is compared theoretical and experimentally, using data from a fringe projector based on a spatial tight modulator. The best way to use the method is with /spl Phi/ decreasing exponentially with time from its maximum value to zero; this provides significant improvements in reliability, accuracy and computation time compared with the original temporal unwrapping algorithm.


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    Titel :

    Shape measurement of discontinuous objects using projected fringes and temporal phase unwrapping


    Beteiligte:
    Saldner, H.O. (Autor:in) / Huntley, J.M. (Autor:in)


    Erscheinungsdatum :

    01.01.1997


    Format / Umfang :

    660790 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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    Huntley, J. M. / Saldner, H. O. / Institute of Physics | British Library Conference Proceedings | 1996


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    Shape Measurement Using Projected Fringes: TWO Innovative Methods

    Saldner, H. / Huntley, J. M. | British Library Conference Proceedings | 1998