We present a surprisingly simple system that performs robust normal reconstruction by dense photometric stereo, in the presence of large shadows, highlight, transparencies, complex geometry, variable attenuation in light intensity and inaccurate light directions. Our system consists of a mirror sphere, a spotlight and a DV camera only. Using this, we infer a dense set of unbiased but noisy photometric data uniformly distributed on the light direction sphere. We use this dense set to derive a very robust matching cost for our MRF photometric stereo model, where the maximum a posteriori (MAP) solution is estimated. To aggregate support for candidate normals in the normal refinement process, we introduce a compatibility function that is translated into a discontinuity-preserving metric, thus speeding up the MAP estimation by energy minimization using graph cut. No reference object of similar material is used. We perform detailed comparison on our approach with conventional convex minimization. We show very good normals estimated from very noisy data on a wide range of difficult objects to show the robustness and usefulness of our method.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Dense photometric stereo using a mirror sphere and graph cut


    Beteiligte:
    Tai-Pang Wu, (Autor:in) / Chi-Keung Tang, (Autor:in)


    Erscheinungsdatum :

    01.01.2005


    Format / Umfang :

    472174 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Dense photometric stereo using tensorial belief propagation

    Kam-Lun Tang, / Chi-Keung Tang, / Tien-Tsin Wong, | IEEE | 2005


    Dense Photometric Stereo by Expectation Maximization

    Wu, T.-P. / Tang, C.-K. | British Library Conference Proceedings | 2006


    A Markov random field approach for dense photometric stereo

    Kam-Lun Tang, / Chi-Keung Tang, / Tien-Tsin Wong, | IEEE | 2005

    Freier Zugriff

    Polarisation photometric stereo

    Atkinson, Gary A. | British Library Online Contents | 2017


    Photometric stereo using LCD displays

    Clark, J. J. | British Library Online Contents | 2010