Shape from Shadows
نویسندگان
چکیده
منابع مشابه
Shape from shadows.
The colors, textures, and shapes of shadows are physically constrained in several ways in natural scenes. The visual system appears to ignore these constraints, however, and to accept many patterns as shadows even though they could not occur naturally. In the stimuli that we have studied, the only requirements for the perception of depth due to shadows were that shadow regions be darker than th...
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Measuring automatically the shape of physical objects in order to obtain corresponding digital models has become a useful, often indispensable, tool in design, engineering, art conservation, computer graphics, medicine and science. Machine vision has proven to be more appealing than competing technologies. Ideally, we would like to be able to acquire digital models of generic objects by simply ...
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1 Abstract We present a new method, shape from darkness, for extracting surface shape information based on object self-shadowing under moving light sources. It is motivated by the problem of human perception of fractal textures under perspective. One-dimensional dynamic shadows are analyzed in the continuous case, and their behavior is categorized into three exhaustive shadow classes. The conti...
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| In this paper we discuss new results on the Shape From Darkness problem: using the motion of cast shadows to recover scene structure. Our approach is based on collecting a set of images from a xed viewpoint as a known light source moves \across the sky". Previously published solutions to this problem have performed the reconstruction only for cross sections of the scene. In this paper, we pre...
متن کاملShape Reconstruction from Cast Shadows Using Coplanarities and Metric Constraints
To date, various techniques of shape reconstruction using cast shadows have been proposed. The techniques have the advantage that they can be applied to various scenes including outdoor scenes without using special devices. Previously proposed techniques usually require calibration of camera parameters and light source positions, and such calibration processes make the application ranges limite...
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ژورنال
عنوان ژورنال: Journal of Complexity
سال: 1998
ISSN: 0885-064X
DOI: 10.1006/jcom.1997.0448