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On computing exact visual hulls of solids bounded by smooth surfaces

Svetlana Lazebnik 1 Edmond Boyer 2 Jean Ponce 1 
2 MOVI - Modeling, localization, recognition and interpretation in computer vision
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes, CNRS - Centre National de la Recherche Scientifique : FR71
Abstract : This paper presents a method for computing the visual hull that is based on two novel representations: the rim mesh, which describes the connectivity of contour generators on the object surface; and the visual hull mesh, which describes the exact structure of the surface of the solid formed by intersecting a finite number of visual cones. We describe the topological features of these meshes and show how they can be identified in the image using epipolar constraints. These constraints are used to derive an image-based practical reconstruction algorithm that works with weakly calibrated cameras. Experiments on synthetic and real data validate the proposed approach.
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Svetlana Lazebnik, Edmond Boyer, Jean Ponce. On computing exact visual hulls of solids bounded by smooth surfaces. IEEE International Conference on Computer Vision and Pattern Recognition (CVPR '01), Dec 2001, Kauai, United States. pp.151--161, ⟨10.1109/CVPR.2001.990469⟩. ⟨inria-00590147⟩



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