INFORMATICA International Journal Main Page Editorial Board Abstracting/Indexing Instructions to Authors Subscription Information Contents Author Index Papers in Production		INFORMATICA, 2003, Vol. 14, No. 3, 375-392 © Institute of Mathematics and Informatics, ISSN 0868-4952 3-D Computer Modeling with Intra-Component, Geometric, Quality and Topological Constraints Athanasios D. STYLIADISa, Petros G. PATIASb, Nikos C. ZESTASb aDepartment of Information Technology, The TEI of Thessaloniki Agiou Panteleimona 24, 551 33 Thessaloniki, Greece E-mail: styl@it.teithe.gr bDepartment of Cadastre, Photogrammetry and Cartography The Aristotle University of Thessaloniki Univ. Box 473, 540 06 Thessaloniki, Greece E-mail: patias@topo.auth.gr, polyedro@otenet.gr Abstract The study of 3-D indoor accurate scenery modeling is an active research area. The produced model can be used in a number of virtual reality applications, in digital documentation of monuments and sites, and so on. Digital photogrammetry and CAD technology have to play a vital role in this field. Photogrammetry's contribution is mainly on data acquisition from imagery, whilst the necessary image knowledge is derived from geometry and topology of image contents. While the first is traditionally used, the second one only lately is been tackled. In this paper, a technique is presented for modeling of indoor scenery based on digital images, photo-derived intra-component, geometric and topologic constraints, object-oriented graphic databases containing 3-D parametric models and a rough (generic) CAD model. Optionally, an absolute reference system could be applied, but for VR applications a relative reference system is adequate. The original contribution with respect to related works in this field is mainly the introduction of Display File, Segment Table, Scene Parts Table and Constraint Table structures which deal with the constraints and ``drive'' a modeling control program called the Constraint Modeler. The use of these structures leads in a direct, global, portable, and semi-automated technique for 3-D indoor modeling. Experimental results from simulated images are presented, and the robustness of the technique is discussed. Keywords: photo-derived modeling, intra-component constraints, geometric constraints, quality constraints, topological constraints, computer modeling, virtual reality To preview Lithuanian abstract see full article text To preview full article text in PDF format click here You could obtain free Acrobat Reader from Adobe
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