Comment on "Numerical Shape from Shading and Occluding Boundaries"
نویسنده
چکیده
The paper ‘Numerical shape from shading and occluding boundaries” [ I O ] proposed a method to determine the 3D shape of an object from a single brightness image using the smoothness constraint on surface orientations, and the orientations of the surface given along an occluding boundary. This paper contributed both a specific algorithm for solving a specific problem, and a general approach that could be applied in other low-level vision problems.
منابع مشابه
Numerical Shape from Shading and Occluding Boundaries
An iterative method for computing shape from shading using occluding boundary information is proposed. Some applications of this method are shown. We employ the stereographic plane to express the orientations of surface patches, rather than the more commonly .used gradient space. Use of the stereographic plane makes it possible to incorporate occluding boundary information, but forces us to emp...
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An iterative method of using occluding boundary information is proposed to compute surface slope from shading. We use a stereographic space rather than the more commonly used gradient space in order to express occluding boundary information. Further, we use "average" smoothness constraints rather than the more obvious "closed loop" smoothness constraints. We develop alternate constraints from t...
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1 . I N T R O D U C T I O N Recent studies on computer vision have exploited many methods for interpret ing a brightness pattern in an image as a shape in 3-D space using physical constraints on the l ight source, object class, surface properties of the object and mul t i ple views (Brady 1975) Especially, contour and shading in the image have a very impor tant role in recovering surface shap...
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متن کاملThe variational approach to shape from shading
We develop a systematic approach to the discovery of parallel iterative schemes for solving the shape-from-shading problem on a grid. A standard procedure for finding such schemes is outlined, and subsequently used to derive several new ones. The shape-from-shading problem is known to be mathematically equivalent to a nonlinear first-order partial differential equation in surface elevation. To ...
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عنوان ژورنال:
- Artif. Intell.
دوره 59 شماره
صفحات -
تاریخ انتشار 1993