Surveying, Monitoring, Photogrammetry, Modeling

Research focus

The Peer review has evaluated this group as Average

The main aim of the research focus, active both in base researches and applications, is to develop Technological-Math-InfoGraphic-Stochastic tools inside new methodologies of automatic data processing, by testing multi-sensor data acquisition technologies, even to improve industrial production. The Research is involved in problem solving about Multi-scale Space Modeling in its complex shapes at the scale involved (Earth-BuiltEnvironment-UrbanSpace-Architecture,Manufacts) through Metric-Geometric-MathDescription-Representation approach, Object Recognizing, DSM extraction and Statistic Analysis. The integrated modern surveying methodologies (LaserScanner-Photogrammetry) from navigation-mobile sensors, allows an improvement of interdisciplinary analysis: monitoring, risk prevention, daily maintenance, contextualized planning, protection of the cultural heritage and of the environment, through image processing and survey data acquisition, methodological protocols and tools developed inside the research group. Research activity according to the following main lines: ? Digital photogrammetry. The research is focused on rigorous Aerial Triangulation model inside System Calibration on sample block of aerial and architectural digital images, calibrated and non, DTM generation by image-correlation, orthophoto3D from aerial and close-range imagery in addition to the cartographic traditional stereo-plotting. One of the most complicated research problem is the generation of 3Dmodel from Laser Scanner point clouds to support Photogrammetric image processing (orthophoto-3D): object recognizing, DSM-DTM, continuous-non continuous surface-contour-breakline extraction using logic-geometry-math-algorithms and interpolating approach (refining TIN model roughs, using minimization energy principle coupled with cluster segmentation, new methods for deblurring and noise filtering). ? Statistical and numerical data treatment is hardly developed, taking into account facilities management for joint adjustment, running from automatic preliminary information acquisition to relational matching in photogrammetry. ? Photogrammetry for cartography. Research and Experimental tests on rigorous model in IMU/GPS System Calibration on sample block of images are oriented to give an important contribution in the orientation facility management inside the cartographic industrial production. ? Monitoring of structures and historical monuments using Topographic and terrestrial Laser Scanning methods. The group accounts for a big experience in the field of structure, infrastructures and historical building monitoring. Several important sites (among the others, cathedrals, i.e. Milan, Venice, Pisa’s Tower, Stadium in Milan) have been periodically controlled by means of leveling and geodetic control networks, integrated by other deformation measurement techniques (e.g. fiber-optic-sensors, robotic total stations). The group is improving the feasibility of measuring deformation of the external surfaces of large dams by using Terrestrial Laser Scanning approach establishing test field on a large dam in Alta Valtellina area by acquiring measurement periodically through two different laser scanners typologies owned by DIIAR. In the meanwhile, several analysis have been carried out to investigate the metrological behavior of laser scanners, and to model systematic errors in measurements, and the applications fields for analyzing geomorphological aspects of rock-faces to prevent sudden rock falls. ? MultiModeling-LaserScanner-Photogrammetry MiMoLSP for Reverse Engineering (RE). Research focus: advanced 3D-representation of complex surfaces through integrated survey methodologies based on LSP to generate 3D-orthophotomodel. The most considerable research inside MiMoLSP is represented by continuous surfaces and surfaces with discontinuity analysis, theoric-math-infographic classification and object recognition, developed inside graphic-environment, through algorithms implementation: the subjects are the studies on morphological analysis of complex shapes (cultural heritage, urban environment) and RE applications inside territory-urban planning, built-yard restoration, conservation processes. Case studies: antrophized coasts, View Front3d, Perspective Views, City Model (WaterFrontMap, Levanto; Navigli, Milan historical center); monuments (Basilica of San Marco in Venice 1:1 scale orthophoto-3D of the mosaic-pavement, Basilica of S. Lorenzo Maggiore in Milan - dating; Villa Reale di Monza - surface recognition and 3DVirtualization - hall vaults systems virtual museum); arts (wood-canvas paintings, sculptures - safeguard and restoration). These topics are carried out inside several financed research projects and private funding on cultural heritage and on new methodologies for RISK MAP definition, carried out inside E-LAB3DPOLI research team, i.e. the national PON(2003-2006) SIDART(Integrated System for Diagnostic of Cultural Heritage) in co-operation with different partners: Consortium Research CETMA (CEntro di progettazione, design & Tecnologie dei Materiali) - whose principal partners are ENEA (National-Energy-Environment-Agency); Politecnico di Milano and Politecnico di Bari, Università degli Studi di Lecce, ELEN (medical laser industry), ATS, INOA (National Institute of Optic Applications). In the framework of this research, a prototype LS-SIDART100 has been designed and produced by Enea-FIS-Frascati, the photogrammetric algorithms of data processing and surface reconstruction was done by E-Lab with Enea informatics support.

Dipartimento di afferenza

Dipartimento di Ingegneria Idraulica, Ambientale, Infrastrutture Viarie, Rilevamento (DIIAR)

Docenti afferenti

Full Professors
Giorgio Bezoari
Alberto Giussani
Carlo Monti
Luigi Mussio
Associate Professors
Raffaella Brumana
Livio Pinto
Assistant Professors
Luigi Fregonese
Marco Scaioni