Passive-Active Geometric Calibration for View-Dependent Projections onto Arbitrary Surfaces

Stefanie Zollmann, Tobias Langlotz, Oliver Bimber
Bauhaus University Weimar, Bauhausstrasse 11, 99425 Weimar
Journal of Virtual Reality and Broadcasting, Vol. 4, No. 6. (2007)


   title={Passive-active geometric calibration for view-dependent projections onto arbitrary surfaces},

   author={Zollmann, S. and Langlotz, T. and Bimber, O. and Herder, J.},

   journal={Journal of Virtual Reality and Broadcasting},






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In this paper we present a hybrid technique for correcting distortions that appear when projecting images onto geometrically complex, colored and textured surfaces. It analyzes the optical flow that results from perspective distortions during motions of the observer and tries to use this information for computing the correct image warping. If this fails due to an unreliable optical flow, an accurate-but slower and visiblestructured light projection is automatically triggered. Together with an appropriate radiometric compensation, view-dependent content can be projected onto arbitrary everyday surfaces. An implementation mainly on the GPU ensures fast frame rates.
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