Previous studies have demonstrated that the perception of shading is based upon assumptions about lighting direction, for example, light from above. However, it is not clear whether these assumptions are used in the perception of cast shadows. Moreover, it is unclear whether a perceptual interaction exists between shading and cast shadows because until now they have been studied separately. In ...

| To prevent moving shadows being misclassiied as moving objects or parts of moving objects, this paper presents an explicit method for detection of moving cast shadows on a dominating scene background. Those shadows are generated by objects moving between a light source and the background. Moving cast shadows cause a frame diierence between two succeeding images of a monocular video image sequ...

Simulating physically accurate soft shadows in Computer Graphics applications is usually done by taking multiple samples from all over the area light source and accumulating them. Due to the unpredictability of the size of the penumbra regions, the sampling density has to be quite high in order to guarantee smooth shadow transitions in all cases, making the process computationally extremely exp...