Passive-Active Geometric Calibration for View-Dependent Projections onto Arbitrary Surfaces Zollmann Stefanie Langlotz Tobias Bimber Oliver 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. dynamic geometric calibration optical flow projector-camera systems 004 periodical academic journal JVRB - Journal of Virtual Reality and Broadcasting 4(2007) 6 2007 1860-2037 urn:nbn:de:0009-6-11762 10.20385/1860-2037/4.2007.6 zollmann2007