BibSonomy publications for /user/jvrb_regulski/Perspective_DistortionThu Dec 13 15:44:12 CET 2007Journal of Virtual Reality and BroadcastingOctober{\tt urn:nbn:de:0009-6-11762}, ISSN 1860-20376 Passive-Active Geometric Calibration for View-Dependent Projections onto Arbitrary Surfaces42007GPU Projections Correction Geometric_Calibration Digital_Peer_Publishing_Initiative Perspective_Distortion GI_ARVR_2006 Surfaces 4(2007)6 Journal_of_Virtual_Reality_and_Broadcasting DiPP [ZLB07] Peer_Reviewed 4.2007 JVRB Open_Access 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.