Once verified the appropriate geometrical integration, a suitable image-based method was developed to obtain 3D models of masonry bridges. In order to reach this aim, in the first part of the experimentation we tested the level of integration and accuracy achievable from the point clouds generated by single sensor on 3D test-field. In fact, the creation of a dataset of zenith images with nadir and oblique images generated by the camera supplied in the drone, suggested the possibility of building 3D models. This solution involved the application of a further camera (smartphone) mounted on the drone to take zenith images. To overcome this limitation, a special low-cost solution was developed. Using UAV platform it is impossible to obtain information on the intrados of the arches since the gimbal of the UAV allows camera rotation only from the nadir to the horizontal position. The aim of this paper is to evaluate the possibility to build 3D models using Structure from Motion (SfM) approach and images generated by sensors mounted on UAV (Unmanned Aerial Vehicle) aerial platform.
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