To accomplish this plan, Program Executive Office (PEO) Aviation, which is responsible for leading and executing the Army's Life Cycle Management for Aviation Weapon Systems, has established eight Acquisition Category One programs. Substantial improvements to Cold War era designs are required to meet current and future threats. After seventeen years of continuous combat the current helicopter fleet is decades old and worn. The aviation portfolio represents approximately 25 percent of the Army equipping budget, the single largest equipment portfolio in the Army. The US Army has a total of nearly 6,000 rotary, fixed wing, and unmanned aircraft, which is more air systems than many of the air forces in the world.

Photogrammetry, Uav, Digital Cultural Heritage, SfM.

Indeed, the methodology and architecture developed was applied to create a 3D model of a masonry bridge built in the middle of 1800s and located in the south of Italy, of special architectural and historic value. 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.

Soal ujian ut pebi 4223