Katie, thirteen, and her twelve-year-old brother Zach have spent their whole lives in the vast and ancient stone fortress called Castle Falcon, somewhere in the present-day American northwest. Their loving…

Wales, a small country, is littered with the relics of war Iron Age forts, Roman ruins, medieval castles and the coastal forts of the eighteenth and nineteenth centuries.

Motion analysis is central to both human and machine vision. It involves the interpretation of image data over time and is crucial for a range of motion tasks suchasobstacledetection,depthestimation,videoanalysis,sceneinterpretation, videocompressionandotherapplications…