Abstract: A video background processing system is disclosed that is configured to receive a video stream including a plurality of successive first video frames at a first resolution. The system comprises a video resolution modifier configured to reduce the resolution of the first video frames from the first resolution to a second resolution lower than the first resolution and thereby generate second video frames. The system also comprises a foreground determiner configured to determine a foreground portion and a background portion in the second video frames and to produce first foreground data indicative of locations of the foreground and background portions in the second video frames at the second resolution, wherein the foreground determiner is configured to use the first foreground data to generate second foreground data indicative of locations of the foreground and background portions in the first video frames.

Abstract: A stereoscopic rendering system is disclosed that comprises a depth buffer having at least two depth buffer portions respectively corresponding to different views of a scene, the depth buffer arranged to store depth values indicative of the depth of pixels in a scene, and the depth buffer portions having different associated depth value ranges so that the different depth buffer portions are distinguishable from each other. The system also includes an image buffer arranged to store information indicative of an image to be displayed. The system is arranged to apply a different depth test for each view of the scene such that only pixels of the view that spatially correspond to the depth buffer portion associated with the view are rendered to the image buffer. The image rendered into the image buffer comprises image portions respectively spatially corresponding to the different depth buffer portions and the different views of the scene.