Notre Dame Du Haut by Spherical Photogrammetry Integrated by Point Clouds Generated by Multi-View Software

Abstract

A convenient new photogrammetric technique, the Multi-Image Spherical Photogrammetry (MISP), particularly suitable for metric recording of architecture, has been set up and already used in many projects (Fangi, 2007, 2008, 2009, 2010, 2011). From a unique point of view, photographs are taken 360° around to form a spherical panorama. This panorama is suitable for measurements. The advantages in comparison with traditional pin-hole photogrammetry are many: the speed of the survey, the low-cost of the system, the drastic reduction of the photogrammetric models. The disadvantages consist in the fact that the only suitable points for plotting are those easily identifiable in the different panoramas, because of lack of stereoscopy. In order to solve this problem the following steps have been made: To use web service of Photosynth to get the orientation of a flurry of photos [27]; To generate dense point cloud by PMVS-2 (Furukawa,[28]); To edit the point cloud with Mesh Lab, an open source software [26]; To employ a suite of modeling programs to create a 3D model of the church.