Title
Interactive chroma keying for mixed reality
Abbreviated Journal Title
Comput. Animat. Virtual Worlds
Keywords
mixed reality; chroma keying; GPU; shader; blue screening; matting; video processing; real-time; Computer Science, Software Engineering
Abstract
In Mixed Reality (MR) applications, immersion of virtual objects in captured video contributes to the perceived unification of two worlds, one real, one synthetic. Since virtual actors and surround may appear both closer and farther than real objects, compositing must consider spatial relationships in the resulting world. Chroma keying, often called blue screening or green screening, is one common solution to this problem. This method is under-constrained and most commonly addressed through a combination of environment preparation and commercial products. In interactive MR domains that impose restrictions oil the video camera hardware, such as in experiences using video see-through (VST) head-mounted displays (HMD), chroma keying becomes even more difficult due to the relatively low camera quality, the use of multiple camera sources (one per eye), and the required processing speed. Dealing with these constraints requires a fast and affordable solution. In our approach, we precondition the chroma key by using principal component analysis (PCA) to obtain usable alpha mattes from video streams in real-time oil commodity graphics processing units (GPUs). In addition, we demonstrate how our method compares to off-line commercial keying tools and how it performs with respect to signal noise within the video stream. Copyright (C) 2009 John Wiley & Sons, Ltd.
Journal Title
Computer Animation and Virtual Worlds
Volume
20
Issue/Number
2-3
Publication Date
1-1-2009
Document Type
Article
DOI Link
Language
English
First Page
405
Last Page
415
WOS Identifier
ISSN
1546-4261
Recommended Citation
"Interactive chroma keying for mixed reality" (2009). Faculty Bibliography 2000s. 1324.
https://stars.library.ucf.edu/facultybib2000/1324
Comments
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