35428 - Applied Photogrammetry M

Learning outcomes

The course provides the knowledge necessary for planning and executing, by photogrammetric techniques and/or laserscanning, 3D surveysand representation of buildings and infrastructures, monuments, urban centres and cities. Some aspects related to non-cartographic applications are discussed,principally in the field of Cultural Heritage, together with the integration with other Geomatic techniques.

Course contents

Photogrammetry, laserscanningand the other surveying techniques in Geomatics. Remarks on the historical development.

Coordinate systems in photogrammetry. Central projection and Projective transformation: basic mathematical remarks, collinearity equations. The "normal case" in stereopair processing.

Photographic equipment and techniques (analogic and digital systems), color theory. Geometrical and radiometrical characteristicsfor digital acquisition, digital images, image processing and analysis. Metric and semi-metric film-based cameras. Aerial and terrestrial digital cameras. GPS-IMU systems for direct orientation.

The orientation procedures.

Interior orientationfor a film based and for a digital camera. The calibration of non metric digital cameras: techniques and algorithmic approaches.

Exterior orientation: of a single image, of a stereopair in two stages, of a stereopair in a single stage. The survey of the Ground Control Points. The Photogrammetric Triangulation by independent models and by bundle clock adjustment.

The main components of a plotting analytic instrument, digital photogrammetric workstations. Stereoscopic and monoscopic plotting, specific solutions provided by digital photogrammetric workstations.

Digital image matching and different strategies for 3D model reconstruction, automatic processing of the photogrammetric stages. Digital Terrain Models (DTM), Digital Surface Models (DSM) and derived products.

Photoplan and othophoto production in a digital environment: realization and problems, the true-orthophoto and its use in urban surveys.

Productivity of Photogrammetry. Technical rules for numerical cartography at different scales.

Planning and realization of a survey: the aerial case and the terrestrial one. The survey of buildings and monuments with complex geometrical properties. Different hardware/software configurations for close-range surveying (architecture, civil engineering, archaeology, industry, etc.)

Terrestrial Laser scanning as a complementary technique for 3D surveying in building, architectural and industrial applications: from data acquisition to visualization of point clouds, generation of the mesh and derived products.

Terrestrial laserscanning instruments and data processing software.

Integration of photogrammetric and laser data with other products (multispectral remote sensing, mobile mapping systems, GIS, diagnostic technologies for Cultural Heritage surveying and monitoring).

Readings/Bibliography

Scientific publications and documents provided during the lectures

KRAUS Karl: "Photogrammetry from Images and Laser Scans", de Gruyter, 2007

SELVINI A., GUZZETTI F.: “Fotogrammetria Generale”, ed. UTET, Torino, 2000

MIKHAIL, BETHEL, McGLONE: “Introduction to modern photogrammetry”, Wiley, 2001

ATKINSON K.B.: "Close Range Photogrammetry and Machine Vision". Wittles Publishing, 2001

GUIDI G., BERALDIN J.A., RUSSO M.: "Acquisizione 3D e modellazione poligonale", McGraw-Hill, 2010

Teaching methods

Lectures and exercises in Laboratory and on the field.

Analysis and discussion by examples of real cases.

Assessment methods

Oral examination (possibility of preliminary written tests).

Teaching tools

Together with the lectures related to the theoretical aspects, the course contemplates exercises in laboratory and on the field: photogrammetric and laserscanning survey of objects of architectural interest, orientation and restitution by digital instrumentation, digital image processing, calibration of non-metric cameras.

Office hours

See the website of Gabriele Bitelli

See the website of Antonio Zanutta