The usable perceived depth range of a stereoscopic 3D display is limited by human factors considerations to a\ud defined range around the screen plane. There is therefore a need in stereoscopic image creation to map depth\ud from the scene to a target display without exceeding these limits. Recent image capture methods provide precise\ud control over this depth mapping but map a single range of scene depth as a whole and are unable to give\ud preferential stereoscopic representation to a particular region of interest in the scene.\ud A new approach to stereoscopic image creation is described that allows a defined region of interest in scene\ud depth to have an improved perceived depth representation compared to other regions of the scene. For example\ud in a game this may be the region of depth around a game character, or in a scientific visualization the region\ud around a particular feature of interest.\ud To realise this approach we present a novel algorithm for stereoscopic image capture and describe an implementation\ud for the widely used ray-tracing package POV-Ray. Results demonstrate how this approach provides\ud content creators with improved control over perceived depth representation in stereoscopic images
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