Image-Based 3D Photography Using Opacity Hulls
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CitationMatusik, Wojciech, Hanspeter Pfister, Addy Ngan, Paul Beardsley, Remo Ziegler, and Leonard McMillan. 2002. Image-based 3D photography using opacity hulls. In Proceedings of the 29th annual conference on Computer graphics and interactive techniques: July 23-26, 2002, San Antonio, Texas, 427-437. New York, N.Y.: ACM Press. Also published in ACM Transactions on Graphics 21(3): 427-437.
AbstractWe have built a system for acquiring and displaying high quality graphical models of objects that are impossible to scan with traditional scanners. Our system can acquire highly specular and fuzzy materials, such as fur and feathers. The hardware set-up consists of a turntable, two plasma displays, an array of cameras, and a rotating array of directional lights. We use multi-background matting techniques to acquire alpha mattes of the object from multiple viewpoints. The alpha mattes are used to construct an opacity hull. The opacity hull is a new shape representation, defined as the visual hull of the object with view-dependent opacity. It enables visualization of complex object silhouettes and seamless blending of objects into new environments. Our system also supports relighting of objects with arbitrary appearance using surface reflectance fields, a purely image-based appearance representation. Our system is the first to acquire and render surface reflectance fields under varying illumination from arbitrary viewpoints. We have built three generations of digitizers with increasing sophistication. In this paper, we present our results from digitizing hundreds of models.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:4141474
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