This paper presents a method for detection and tracking of moving cast shadows on a dominating scene background in a monocular video sequence. The method assumes moving shadows on a dominant smooth shaped background. The shadow causing light sources are assumed to be strong enough to cause visible temporal frame diierences by moving cast shadows. These diierences are detected and classiied into...

The Xapagy architecture is a story-oriented cognitive system which relies exclusively on the autobiographical memory implemented as a raw collection of events. Reasoning is performed by shadowing current events with events from the autobiography. The shadows are then extrapolated into headless shadows (HLSs). In a story following mood, HLSs can be used to track the level of surprise of the agen...

Soft shadows give important cues of realism to 3D scenes. Existing methods can produce hard shadows in real time and soft shadows in minutes to hours per frame. Here a technique for producing accurate soft shadows quickly in software is presented, allowing soft shadow texture maps to be computed for simple scenes on commodity hardware in real time.