Francesco Fassi | Politecnico di Milano (original) (raw)

Papers by Francesco Fassi

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

(francesco.fassi, mattia.previtali)@polimi.it 4 Politecnico di Torino, Italy-(antonia.spano, giul... more (francesco.fassi, mattia.previtali)@polimi.it 4 Politecnico di Torino, Italy-(antonia.spano, giulia.sammartano)@polito.it * Symposium Director The content of this publication aims to integrate scientific, technological, and humanistic expertise to define documentation systems that cover the entire lifecycle of artifacts, archaeological sites, historic buildings, and landscapes, employing cutting-edge digital technologies. All the included papers were presented at the 29 th CIPA2023 Symposium, titled "Documenting, Understanding, Preserving Cultural Heritage: Humanities and Digital Technologies for Shaping the Future". The selection of the contributions was made based on a peer review of the extended abstracts by the Scientific Committee. The 29 th CIPA Heritage Documentation Symposium took place from 25 th to 30 th

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Aug 22, 2019

The paper presents the case study of the complete 3D survey of the area of the Fort of Pietole in... more The paper presents the case study of the complete 3D survey of the area of the Fort of Pietole in Borgo Virgilio using the Leica Pegasus Backpack wearable Mobile Mapping System (MMS). Surveying the site is challenging because of its complex topology on the one hand (with notably narrow passages) and because of the presence of vegetation on the other. The framework within which this research takes place is the Fort of Pietole survey project that aims at the extraction of the Digital Terrain Model (DTM) of the area and the georeferencing of the fort defensive structures. The requirement of the project is the 3D reconstruction of the whole area at an accuracy that stands between a big scale environmental survey and a small-scale architectonic survey (1:500). The project is the opportunity to discuss the state of the art of wearable MMS, and to test the versatility and accuracy outcomes of the Pegasus Backpack under varying and challenging condition (indoor-outdoor, even-uneven pavement, satellite covered-denied areas) with the ambitious goal to use only the backpack MMS to record all the data from the DTM to the indoor narrow structures.

The laboratory of survey, photogrammetry, cartography and GIS of the Politecnico of Milano has re... more The laboratory of survey, photogrammetry, cartography and GIS of the Politecnico of Milano has reached in these years a good experience in the field of architectural survey, representation and 3D modelling. We applied different types of methodologies for the surveying and modelling of complex architectures: manual measurements, classical topography, photogrammetry and laser scanner. In the last years we had the opportunity to test all these kind of methodologies in a very complete and complex contest: the Real Villa of Monza, Italy. In this paper we will explain this big survey experience where we test and integrate different kind of survey methodologies. The aim is to synthesize our opinion on the actual state of art in this field, reporting the main results and some critical comments.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Jun 26, 2023

This paper describes the digitization test of Fonte Giuturna (Giuturna spring) in the Roman Forum... more This paper describes the digitization test of Fonte Giuturna (Giuturna spring) in the Roman Forum area, from survey to data management through the in-use monitoring system, the WebApp SyPEAH of the Parco Archeologico del Colosseo. The location of Giuturna Spring, characterized by the presence of heterogeneous archaeological remains from different ages, was surveyed in May 2022 as part of a research project that aimed to superintend the entire Cultural Heritage digitization pipeline to provide the Archaeological Park Administration the digitization guidelines as a tool to standardize future surveys and data deliveries. Inspired by the desire to build a system of protection and conservation at the service of sustainable exploitation, SyPEAH is a web platform based on open-source modules designed to manage archaeological records with a WebGIS approach. It supports the use of several 3D data formats, including point clouds. The paper focuses on the web platform, describing the web app's main features, especially in terms of point cloud data management. Moreover, possible future development of the platform intended to implement usability for single archaeological objects is described.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2010

This paper will describe the evolutionary stages that shaped and built, over the time, a robust a... more This paper will describe the evolutionary stages that shaped and built, over the time, a robust and solid relationship between ‘indirect survey methods’ and knowledge of the ‘architectural matter’, aiming at producing the conservation project for the built heritage. Collecting architectural data by simply drawing them was considered to be inadequate by John Ruskin already in 1845. He strongly felt the need to fix them through that ‘blessed’ invention that was the ‘daguerreotype.’ Today taking simple photographs is not enough: it is crucial to develop systems able to provide the best graphics and metric supports (possibly in the third dimension) for the development and editing of the architectural project. This paper will focus not only on the re-examination of historical data, on the research and representation of the ‘sign’, but also on the evolution of technologies and ‘reading methods’, in order to highlight their strengths and weaknesses in the real practice of conservation project and in the use of the architectures of the pas

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, May 30, 2018

... E-LAB 3D, Piazza Leonardo da Vinci, 32 – 20133 Milan, Italy - (cristiana.achille, raffaella.b... more ... E-LAB 3D, Piazza Leonardo da Vinci, 32 – 20133 Milan, Italy - (cristiana.achille, raffaella.brumana,francesco.fassi, carlo.monti)@polimi.it b POLITECNICO DI MILANO, DIIAR – LARIFO, Laboratory of Survey and Photogrammetry, via Scarsellini, 15 – 46100 Mantova, Italy - (luigi ...

The Duomo of Milan represents one of the most important and magnificent Cathedrals around the wor... more The Duomo of Milan represents one of the most important and magnificent Cathedrals around the world. The construction started in the 14th century and continued until the 18th with the completion of the main spire and the statue of the Madonnina crowning it. This Cathedral is characterized by the use of Candoglia marble, with noteworthy mechanical properties, but sub-jected to physical degradation over time. For this reason, restoration works began from the 19th century and are still going ahead, involving in different periods the main structural and non-structural portions of this Cathedral. In this paper, some recent interventions on the main spire and on the Tiburio vaults supporting it are described. The design of these restoration works has been guided by a synergetic combination of different disciplines: geometrical survey, historical analysis and structural analysis based on simplified approaches as well as on more refined numerical models. This approach has been adopted to guarantee a successful interven-tion in due respect of the structural safety of the Duomo as well as of the preservation of the historic and architectural value of this Cathedral

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019

Photogrammetry is a survey method that provides good quality results also by using basic photogra... more Photogrammetry is a survey method that provides good quality results also by using basic photographic equipment and user-friendly, low-cost software. The advantages of the image-based modelling techniques compared with the traditional topographic tools are very significant in emergencies, when the time for the survey is limited and many buildings are involved, as usually happens in case of relevant seismic events. The goal of this study is to verify the quality of the models obtained from quick digital images acquisition, carried out under non-optimal lighting condition and no accessibility of the building. As case of study was chosen the main front of Villa Galvagnina in Moglia, a Renaissance hunting palace badly damaged by the earthquake of May 20, 2012. The modelling was performed using two different software, Agisoft Metashape and 3DFlow Zephyr. This paper presents a comparison between the results obtained using different datasets; the workflow, the difficulties encountered during the survey and the data processing methods are fully described and discussed.

Building Pathology and Rehabilitation, 2016

The topic regards a project submitted for funding, and then realized, with a plan of action to “p... more The topic regards a project submitted for funding, and then realized, with a plan of action to “promote the rationalization and renewal of Cultural Heritage”. The project’s proposal is the promotion of good practice in the prevention and preservation of historical and architectural heritage (Bandi Cariplo 2013). It is about some historic churches of the city of Monza, where the religious buildings occupy a prominent place in the central area; owing to their visibility, historical and artistic importance, cultural and social value and appreciation of the services provided the preservation of these building is a public theme. The writing describes the whole method taken on the organization of a contest to select researchers and the outline of a method to be followed/the identification of precise degeneration of the building to be studied/the selection of researchers appropriate to the specific themes previously identified/the organization of the researches/the organization of the results in a national database/the construction of a 3D model/the use of a 3D model as database for information itself.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Feb 25, 2022

HoloLens 2 is a state-of-the-art of Mixed Reality device that can augment the natural environment... more HoloLens 2 is a state-of-the-art of Mixed Reality device that can augment the natural environment with virtual content in the form of holograms. Spatial mapping is the capability of the device to scan the environment and provide the user with a detailed 3D mesh model representation of its surroundings. The device can place holograms about real-world objects, perform occlusions and simulate physical interactions only having the geometric knowledge of its operating environment. HoloLens 2 mapping capabilities have been extensively tested. Nevertheless, no test was performed on monumental heritage buildings, where dimensions far exceed the typical sensor working range of the device. The authors want to evaluate the capability of the device to map monumental spaces. In these environments, dimensions, repetition of elements and heterogeneity of areas provide a real challenge for out-of-the-box Microsoft localization and mapping algorithms. The test case will be Milan Cathedral, inside the research project to build an MR application to help and enhance the systematic and planned maintenance intervention and inspections. Mapping capabilities have been tested in very different spaces: i) the south nave; ii) the empty volumes between the internal vaults and the external roof ("Sordine"); iii) the narrow spiral staircase connecting the south nave with the roofs lower level.