Journal
INTERNATIONAL JOURNAL OF COMPUTER VISION
Volume 38, Issue 3, Pages 199-218Publisher
SPRINGER
DOI: 10.1023/A:1008191222954
Keywords
scene modeling; photorealistic reconstruction; multi-view stereo; space carving; voxel coloring; shape-from-silhouettes; visual hull; volumetric shape representations; metameric shapes; 3D photography
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In this paper we consider the problem of computing the 3D shape of an unknown, arbitrarily-shaped scene from multiple photographs taken at known but arbitrarily-distributed viewpoints. By studying the equivalence class of all 3D shapes that reproduce the input photographs, we prove the existence of a special member of this class, the photo hull, that (1) can be computed directly from photographs of the scene, and (2) subsumes all other members of this class. We then give a provably-correct algorithm, called Space Carving, for computing this shape and present experimental results on complex real-world scenes. The approach is designed to (1) capture photorealistic shapes that accurately model scene appearance from a wide range of viewpoints, and (2) account for the complex interactions between occlusion, parallax, shading, and their view-dependent effects on scene-appearance.
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