A multiresolution approach for shape shading coupling deterministic and stochastic optimization
نویسندگان
چکیده
منابع مشابه
A Multiresolution Approach for Shape from Shading Coupling Deterministic and Stochastic Optimization
Shape from shading is an ill-posed inverse problem for which there is no completely satisfactory solution in the existing literature. In this paper, we address shape from shading as an energy minimization problem. We first show that the deterministic approach provides efficient algorithms in terms of CPU time, but reaches its limits since the energy associated with shape from shading can contai...
متن کاملProject Proposal: A Multiresolution Stochastic Approach for Shape From Shading Using Intensity Gradient Constraint
The objective of this project is the study of Shape from Shading (SfS) problem in a variational framework. Among the other shape recovery methods, SfS is employed to obtain three-dimensional shape using spatial variations of brightness in an image. In this study, SfS problem will be addressed as an energy minimization problem. A constraint which establishes a connection between intensity gradie...
متن کاملFrom Deterministic to Stochastic Methods for Shape From Shading
Shape from shading designates the problem of shape rebuilding of a surface, starting from one image only of this surface. We compare different iterative methods of resolution of shape from shading. An analysis of the various discrete formulations of the problem is made, which allows the proposition of a certain number of error functions. Three deterministic methods to minimize these errors are ...
متن کاملNonlinear Multiresolution: A Shape-From-Shading Example
Shape-from-shadi&is treated in this correspondence as an example of such difficulties. Reduction of the gray level -resolution of an image, as often done in image “pyramids,” does not correspond to images obtained by reducing the shape resolunbn: the 3-D resolution of an object The correspondence between gray level and shape resolutions is therefore diiussed, and a method is proposed for using ...
متن کاملA Spatially Multiresolution, Mrf Optimization Based Approach to the Shape from Shading Problem
This paper extends the MRF formulation approach [6] for solving the shape from shading problem. Our method uses simulated annealing Gibbs sampling to minimize a lattice energy for an MRF formulation which characterizes the Shape from Shading (SFS) problem under Lambertian reflectance conditions. We explore a spatial multi-resolution approach which refines the digital elevation map of the surfac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Pattern Analysis and Machine Intelligence
سال: 2003
ISSN: 0162-8828
DOI: 10.1109/tpami.2003.1240116