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Soft edge and soft corner blending

: Lancelle, Marcel; Fellner, Dieter W.

Bohn, Christian-Arved (Hrsg.) ; Gesellschaft für Informatik -GI-, Fachgruppe Virtuelle Realität und Augmented Reality:
Virtuelle und Erweiterte Realität. 8. Workshop der GI-Fachgruppe VR/AR 2011 : 8. Workshop der GI-Fachgruppe VR/AR, 15.09.11 bis 16.09.11, Wedel
Aachen: Shaker, 2011 (Berichte aus der Informatik)
ISBN: 978-3-8440-0394-9
ISSN: 0945-0807
Workshop Virtuelle & Erweiterte Realität (VR/AR) <8, 2011, Wedel>
Conference Paper
Fraunhofer IGD ()
virtual reality (VR); Multi-Screen Projections; tiled display; Forschungsgruppe Semantic Models, Immersive Systems (SMIS)

We address artifacts at corners in soft edge blend masks for tiled projector arrays. We compare existing and novel modifications of the commonly used weighting function and analyze the first order discontinuities of the resulting blend masks. In practice, e.g. when the projector lamps are not equally bright or with rear projection screens, these discontinuities may lead to visible artifacts. By using first order continuous weighting functions, we achieve significantly smoother results compared to commonly used blend masks.