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PHOTOGRAMMETRY AND 3D LASER SCANNING
Single discipline educational activity
Course Sheet Academic Year of enrolment:
Disciplinary Sector:
Topography and Cartography
Professor and Collaborators:
Hours of classroom activity:
Prerequisites:
Knowledge of the basics of mathematics, geometry, drawing and topography.
Objectives
Contents The course is structured in a theoretical and a practical part. In the theoretical part of the course, the principles of Digital Photogrammetry and Laser Scanner as well as 3D acquisition methods will be covered; in the practical part, activities such as calibrating a camera, (digital) image rectification, building realistic 3D model and managing the point cloud generated by a terrestrial laser scanner will be covered. In particular, the course covers the following topics:
- the photogrammetric process;
- construction of 3D surfaces;
- 3D acquisition platforms;
- 3D modelling by images;
- 3D laser scanning.
Extended Syllabus The photogrammetric process – Photogrammetric systems and procedures; Mathematical fundamentals; Geometry of the camera as a measuring device; Lenses; Transformation of the images (affine, polynomial); Normal case of stereo photogrammetry; Epipolar geometry; SIFT; geometric acquisition; building dense point cloud (1.5 CFU).
Building 3D surface – TIN, Non Uniform Rational Basis-Splines-NURBS, quadmesh, platonic solids (1 CFU).
Platforms for 3D acquisition – terrestrial (tripod, pole, crane); UAV-Unmanned aerial vehicle (type, flight planning, regulation) (1 CFU – 9 ore).
3D modelling using images – Photogrammetric pipeline; software for 3D reconstruction and modelling (1 CFU)
3D laser scanning – Laser-based systems (Laser triangulation, scanners and trackers); principles of acquisition with terrestrial laser scanner and data processing; Simultaneous Localization and Mapping-SLAM; managment of 3D point cloud (1.5 CFU)
Recommended Bibliography Lecture notes provided by the lecturer
Further reading:
Luhmann, T., Robson, S., Kyle, S., & Boehm, J. (2019). Close-range photogrammetry and 3D imaging. In Close-range photogrammetry and 3D imaging. de Gruyter.
Shan, J., & Toth, C. K. (2018). Topographic laser ranging and scanning: principles and processing. CRC press.
De Luca, L. (2011). La fotomodellazione architettonica. Rilievo, modellazione, rappresentazione di edifici a partire da fotografie.
Methods of Provision
Evaluation methods Verification of learning:
Oral examination of the topics covered in class, including the preparation and discussion of a project.