The Visual Computing of Projector-Camera Systems
Date issued
2008
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Václav Skala - UNION Agency
Abstract
Their increasing capabilities and declining cost make video projectors widespread and established presentation
tools. Being able to generate images that are larger than the actual display device virtually anywhere is an
interesting feature for many applications that cannot be provided by desktop screens. Several research groups
discover this potential by applying projectors in unconventional ways to develop new and innovative information
displays that go beyond simple screen presentations. Todays projectors are able to modulate the displayed
images spatially and temporally. Synchronized camera feedback is analyzed to support a real-time image
correction that enables projections on complex everyday surfaces that are not bound to projector-optimized
canvases or dedicated screen configurations. In this talk I will give an overview over our projector-camera-based
image correction techniques for geometric warping, radiometric compensation, reduction of global illumination
(such as inter-reflections) or view-dependent effects (such as specular reflections), increasing focal depth, and
embedding imperceptible codes with a single or with multiple projection units. Thereby, GPU-based real-time
rendering and computer vision on graphics hardware are tightly coupled. Such techniques have proved to be
useful tools for many real-world applications. Examples include ad-hoc stereoscopic VR/AR visualizations
within everyday environments, quality improvements for (semi-)immersive VR projection displays, on-site
architectural simulations, augmentations of museum artifacts, video installations in cultural heritage sites,
projections onto stage settings during live performances, presentations using mobile (pocket) projectors, outdoor
advertisement displays, digital illumination and projections in modern television studios, computer games, and
more.
Description
Subject(s)
vizuální výpočetní technika, projektor-kamerové systémy
Citation
WSCG '2008: Full Papers: The 16-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision in co-operation with EUROGRAPHICS, University of West Bohemia Plzen, Czech Republic, February 4 - 7, 2008, p. i.