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Numerical Solution of the Perspective Shape-from-Shading Problem
, 2005
"... We study the Perspective Shape from Shading problem from the numerical point of view presenting a simple algorithm to compute its solution. The scheme is based on a semi-Lagrangian approximation of the first order Hamilton-Jacobi equation related to the problem. The scheme is converging to the weak ..."
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Cited by 2 (2 self)
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We study the Perspective Shape from Shading problem from the numerical point of view presenting a simple algorithm to compute its solution. The scheme is based on a semi-Lagrangian approximation of the first order Hamilton-Jacobi equation related to the problem. The scheme is converging to the weak
An Algorithm for a Linear Shape-from-Shading Problem
"... Abstract. We present a sequential algorithm for recovery of an object shape from a shading pattern generated under the assumption of a linear reflectance map. The algorithm operates on a rectangular discrete image and uses the height of the sought-after surface along a curve in the image (image boun ..."
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boundary) as initial data. 1 Introduction A monochrome photograph of a smooth object will typically exhibit brightness variation, or shading. Of interest to researchers in computer vision has been the problem of how object shape may be extracted from image shading. This shape-from-shading problem has been
Analytical Solution of Shape from Shading Problem
"... A new geometrical approach in solving the shape from shading problem of Lambertian model is discussed. It is shown that this problem is bound by two local constraints through the global and local geometrical analysis and through the direct geometrical interpretation of the problem. The analytical so ..."
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A new geometrical approach in solving the shape from shading problem of Lambertian model is discussed. It is shown that this problem is bound by two local constraints through the global and local geometrical analysis and through the direct geometrical interpretation of the problem. The analytical
Geometric Solution of Shape from Shading Problem
"... A new geometrical approach in solving the shape from shading problem of Lambertian model is discussed. It is shown, through the global and local geometrical analysis, that the problem is bound by two local constraints. The C1 continuous analytic solution is derived. The solution has two degrees of f ..."
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A new geometrical approach in solving the shape from shading problem of Lambertian model is discussed. It is shown, through the global and local geometrical analysis, that the problem is bound by two local constraints. The C1 continuous analytic solution is derived. The solution has two degrees
Solving the shape-from-shading problem on the CM-5*
"... We consider the problem of recovering surface shape from image shading for the situation in which a distant overhead “sun ” illuminates a Lambertian surface. An iterative scheme is presented which requires no prerequisite shape information. This scheme forms the basis for a parallel algorithm implem ..."
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We consider the problem of recovering surface shape from image shading for the situation in which a distant overhead “sun ” illuminates a Lambertian surface. An iterative scheme is presented which requires no prerequisite shape information. This scheme forms the basis for a parallel algorithm
A LOOPY BELIEF PROPAGATION APPROACH TO THE SHAPE FROM SHADING PROBLEM
"... Abstract: This paper describes a new approach to the shape from shading problem, using loopy belief propagation which is simple and intuitive. The algorithm is called Loopy Belief Propagation Shape-From-Shading (LBP-SFS). It produces reasonable results on real and synthetic data, and surface informa ..."
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Cited by 1 (1 self)
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Abstract: This paper describes a new approach to the shape from shading problem, using loopy belief propagation which is simple and intuitive. The algorithm is called Loopy Belief Propagation Shape-From-Shading (LBP-SFS). It produces reasonable results on real and synthetic data, and surface
Applications of cellular neural networks for shape from shading problem
- in Proc. Int. Workshop Machine Learning and Data Mining in Pattern Recognition, Lecture Notes in Artificial Intelligence
, 1999
"... Abstract. The Cellular Neural Networks (CNN) model consist of many parallel analog processors computing in real time. CNN is nowadays a paradigm of cellular analog programmable multidimensional processor array with distributed local logic and memory. One desirable feature is that these processors ar ..."
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Cited by 3 (1 self)
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in the network. The focus of this paper is to present one new methodology to solve Shape from Shading problem using CNN. Some practical results are presented and briefly discussed, demonstrating the successful operation of the proposed algorithm. 1
A Divide-and-Conquer Strategy in Shape from Shading problem
- IN PROCEEDINGS OF CVRP’97
, 1997
"... A divide-and-conquer strategy in shape from shading problem under fully perspective condition is proposed for the information recovery of book surfaces. The whole recovery process is composed of three sequential steps: preprocessing, apparent shape recovery, and ortho-image generation. Pure shade im ..."
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Cited by 11 (2 self)
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A divide-and-conquer strategy in shape from shading problem under fully perspective condition is proposed for the information recovery of book surfaces. The whole recovery process is composed of three sequential steps: preprocessing, apparent shape recovery, and ortho-image generation. Pure shade
Results 1 - 10
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9,705
