By Raphaële Héno
Conventional topographic databases, got by means of seize on aerial or spatial pictures offer a simplified 3D modeling of our city setting, answering the desires of diverse functions (development, probability prevention, mobility administration, etc.). even though, after we need to symbolize and research extra advanced websites (monuments, civil engineering works, archeological websites, etc.), those versions not suffice and different acquisition and processing skill must be carried out. This e-book makes a speciality of the learn of tailored lifting skill for "notable buildings". The equipment tackled during this ebook conceal lasergrammetry and the present ideas of dense correlation in keeping with photos utilizing traditional photogrammetry.
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Extra info for 3D Modeling of Buildings. Outstanding Sites
D’X,Y à X,Y,Z, de nouveaux outils pour l’étude architecturale et archéologique. Restitution 3D, lasergrammétrie et photogrammétrie: le cas de la citerne el-Nabih à Alexandrie”, Actes du colloque Virtual Retrospect 2009, Pessac, 18–20 November 2009, pp. 151–159, Archeovision, vol. 4, Editions Ausonius, Bordeaux, 2010. , Metric Survey Specifications for Cultural Heritage, English Heritage, 2009. , “Numérisation 3D et déroulé photographique des 134 colonnes de la Grande Salle Hypostyle de Karnak”, Revue XYZ, vol.
1. Potentials Drawing up the statement of requirements for digitization, prior to the production of building specifications for the contractor, is a challenging exercise. A comprehensive, precise and well geolocalized digitization of an outstanding site may be requested in the case of an inventory, a restoration or an archeological dig, or with the aim to make it accessible to everyone everywhere with a digital model that can be consulted online (virtual tourism). Requirements regarding content, resolution, precision or up-to-dateness obviously vary depending on the context.
2. Spatial resolution of images The dimensional sizes are: – distance from the object, marked H; – focal distance of the camera, marked f (distance from the optical center O of the lens to the surface where light rays from the infinite converge and imprint a sharp image on the back of the camera chamber); – the dimensions of the image plane (where the sensitive surface is placed, film or charge-coupled device (CCD) or complementary metal oxide semiconductor (CMOS) sensor, which captures the image); – the size of a pixel for a digital camera, marked Tpx.
3D Modeling of Buildings. Outstanding Sites by Raphaële Héno