From Point Cloud to 3d Model, Modelling Methods Based on Architectural Knowledge Applied to Fortress of Châtel-Sur-Moselle (France)

Abstract

ABSTRACT:3D survey techniques applied to buildings such as photogrammetry and laser scanning produces a volume of data very important. Upon acquisition, the issue of data management greatly influences the acquisition parameters and production data. Contemporary tools usually allow acquiring data sets denser than necessary without taking a very long acquisition times. We are interested in modeling from 3D data. There is no question here of mesh from the point cloud, but to model space according to their constituent elements. Data having a high density provide a rich description of the object. The issue of simplification raises the problem of loss of means of describing the object of interest. The final model, to keep the quality of description of point clouds, must remain very close to the initial data. This constraint derives the inverse problem. It is to be faithful to the data without performing mesh. The purpose of the study must remain the goal of modeling. Assumptions used to derive simple geometric primitives, which are assembled together the simplified model. The resulting model consists of surface distance for 92% of them within 5 cm of the point cloud. The model thus created is faithful to the cloud but also the rules of construction of the building which he prefigures representation.

Boundaries Extraction from Segmented Point Clouds as Input for Historical Building Information Modelling

“…Considering a tolerance of st = 5cm, for 95% of points, the distances between points and their associated primitives are less than 5 cm. The same result was obtained for a 3D model created manually in a previous project ( [12]).…”

Yedi Kule - Monument Road Race: The Construction of the 3d Mapping Animation of the Old City of Thessaloniki, Greece

“…The advantages are the speed in the rotation of the video, the panoramic viewing of the area, the capture angles and the focus on points of cultural and architectural interest. (Emmanuel & Grussenmeyer, 2012). Finally, the virtual tour was created during the pandemic without on-site recording.…”

3D MODELING OF HEADSTONES OF THE 2ND AND 3RD CENTURY BY LOW COST PHOTOGRAMMETRIC TECHNIQUES

“…However the quality of the produced models and the performance of the software have only rarely been evaluated. These techniques can provide an alternative to laserscanning, which is a more expensive and not always more accurate technique (Alby & Grussenmeyer, 2012). (Kersten & Lindstaedt, 2012) investigated the potential of automatic 3D object reconstruction from multiple images by comparing several software packages and web services.…”