منابع مشابه
Modeling Based on Photographic Data
Photography is a 2-dimensional medium which represents 3-dimensional space, as a central projection on a plane. As it is possible to represent 3D space by a photograph, it is also possible, using mathematical methods, to obtain data about 3-dimensional structures from the data registered on photographs. We used two methods to obtain spatial data from photographs: restitution of perspective imag...
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An expression derived for hologram exposures made along the straight-line portion of an H-D curve of a photographic plate gives the first-order transmittance of a hologram made of several object points exposed simultaneously (conventional holograms). This expression is compared with a similar expression derived previously for holograms made of several object points exposed sequentially (synthet...
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Using photographic flash for candid shots often results in an unevenly lit scene, in which objects in the back appear dark. We describe a spatially adaptive photographic flash system, in which the intensity of illumination varies depending on the depth and reflectivity of features in the scene. We adapt to changes in depth using a single-shot method, and to changes in reflectivity using a multi...
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ژورنال
عنوان ژورنال: Nature
سال: 1885
ISSN: 0028-0836,1476-4687
DOI: 10.1038/032626f0