منابع مشابه
Rendering of Cast Shadows
Appearance-based approaches have the advantage of representing the variability of an object’s appearance due to illumination change without explicit shape modeling. While a substantial amount of research has been performed on the representation of object’s diffuse and specular shading, little attention has been paid to cast shadows which are critical for attaining realism when multiple objects ...
متن کاملThe perception of cast shadows.
When an object casts its shadow on a background surface, the shadow can be informative about the shape of the object, the shape of the background surface and the spatial arrangement of the object relative to the background. Among all these roles, we found that cast shadows were perceptually most relevant for the recovery of spatial arrangement, especially when the shadow is in motion. This find...
متن کاملSelf Shadows and Cast Shadows in Estimating Illumination Distribution
This paper compares two methods for estimating illumination distributions from shadows: methods using self shadows and cast shadows. The cast shadow method provides an effective framework for recovering illuminations in a real scene utilizing variations of image brightnesses inside shadows cast by an occluding object of known shape. The shadow surface is typically the same plane on which the ob...
متن کاملIllumination Recovery from Images with Cast Shadows
Title of thesis: ILLUMINATION RECOVERY FROM IMAGES WITH CAST SHADOWS Xue Mei Master of Science, 2007 Thesis directed by: Professor Gang Qu Department of Electrical and Computer Engineering and Professor David Jacobs Department of Computer Science The effects produced in an image by cast shadows can be quite complex, especially when light comes from all directions. This makes it difficult to rec...
متن کاملImpossible Cast Shadows in Ukyio-e Paintings
A very limited number of shadows is registered in Eastern art (Toyama and Naito 2008). Among these are those that are depicted in two scrolls at the Tokyo Idemitsu Museum of Art. The first is a representation of Scenes from the Life of Edo by Miyagawa Chosyun (1682-1752) (Figure 1). The second, by Chôbunsai Eishi (1756-1829), dating from the first years of the 19th century is entitled Going to ...
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ژورنال
عنوان ژورنال: Nature
سال: 1981
ISSN: 0028-0836,1476-4687
DOI: 10.1038/291273a0