Software chroma keying in an immersive virtual environment
F. van den Bergh, Lalioti · University of the Arts London Research Online (University of the Arts London) · 1999
This paper presents a very fast software chroma keying algorithm, requiring at most five integer operations per pixel. An improvement of more than 300% in performance over HLS based algorithms was achieved. The algorithm has been developed for use in an immersive virtual environment, which is also described here. Keywords: Virtual Reality, Immersive Telepresence, Chroma Keying 1 Introduction Compositing is a technique used when two images are combined so that some regions of the resulting image come from the first source image, while the rest comes from the second source image. A mask, in this context, describes which part of the first source image should remain. Several methods of generating such a mask exist; one that is often used in television productions is a technique known as Chroma Keying. With chroma keying the one image is recorded in a studio where the background is a uniform color, usually blue. The actor (weatherman, newsreader, etc.), who is not wearing any blue cloth...