Non-uniform resampling in perspective compensated large scale 3D visualization

Maria Shcherban, Olli Suominen, Atanas Gotchev

    Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu

    159 Lataukset (Pure)

    Abstrakti

    The presented work addresses the problem of non-uniform resampling that arises when an image shown on a spatially immersive projection display, such as walls of a room, is intended to look undistorted for the viewer at different viewing angles. A possible application for the proposed concept is in commercial motion capture studios, where it can be used to provide real-time visualization of virtual scenes for the performing actor. We model the viewer as a virtual pinhole camera, which is being tracked by the motion capture system. The visualization surfaces, i.e. displays or projector screens, are assumed to be planar with known dimensions, and are utilized along with the tracked position and orientation of the viewer. As the viewer moves, the image to be shown is geometry corrected, so that the viewer receives the intended image regardless of the relative pose of the visualization surface. The location and orientation of the viewer result in constant recalculation of the projected sampling grid, which causes a non-uniform sampling pattern and drastic changes in sampling rate. Here we observe and compare the ways to overcome the consequent problems in regular-to-irregular resampling and aliasing, and propose a method to objectively evaluate the quality of the geometry compensation.
    AlkuperäiskieliEnglanti
    OtsikkoElectronic Imaging
    Alaotsikko3D Image Processing, Measurement (3DIPM), and Applications
    KustantajaIS&T/SPIE
    DOI - pysyväislinkit
    TilaJulkaistu - helmik. 2016
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaIS&T International Symposium on Electronic Imaging -
    Kesto: 1 tammik. 2000 → …

    Julkaisusarja

    Nimi
    ISSN (elektroninen)2470-1173

    Conference

    ConferenceIS&T International Symposium on Electronic Imaging
    Ajanjakso1/01/00 → …

    Julkaisufoorumi-taso

    • Jufo-taso 1

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