Robust and accurate foreground-background segmentation is a relatively small but crucial step in several computer vision applications. It is a key element in surveillance, 3D-modelling from silhouettes, motion capture, or gesture analysis for human-computer interaction (HCI). For several of these, real-time processing is of main importance and thus should be extremely fast. This work by Andreas Griesser of ETH Zurich proposes a high-speed GPU-based implementation that processes image sequences in less than 4ms per frame and frees the CPU from this processing step altogether. Resulting segmentation exhibits compactness and smoothness in foreground areas as well as for inter-frame temporal contiguity. (Project homepage and software download,  Andreas Griesser, Computer Vision Lab, ETH Zuerich.)