3D Reconstruction Applied to Virtual Heritage and Cultural Conservation

There is increasing interest in creating 3D photo-realistic computer models of monuments or heritage buildings, both indoors and outdoors. Our approach to 3D Reconstruction is to use automated distance measurements together with photographs. Two technologies are used: i) a combined laser digital camera sensor for data acquisition and ii) mobility for resolving spatial occlusions. After a few scanning operations it is possible to create complete 3D textured models of the building or monument "as-built". The models are visually appealing, lnternet compatible and geometrically and dimensionally accurate. The paper describes the main steps in building complete 3D models. Results include the models of the "Cour d'Honneur" and "Salon Delacroix" at the French National Assembly (Palais Bourbon), Paris, and the "Sala dello Scrutinio" at the Doges' Palace, Venice.