Workshops
Sunday, 25th June will be all dedicated to the pre-Symposium workshops
General remarks:
The workshops will be organised in two sessions, as reported in the calendar below
The venue of the workshop is the Morgagni Teaching Center (University of Florence)
Please, notice that the workshop "Which values do your pixels have? Theory and practice of colour-accurate photography" has been cancelled due to the Lecturers' unavailability.
Underwater photogrammetry for mapping, documenting, and preserving submerged heritage
Lecturers: Fabio Menna, Erica Nocerino
Short description: Water covers two-thirds of the earth’s surface with an average depth of more than 3500 m and a maximum depth of almost 11000 m (the Mariana Trench), far greater than the highest peak of the world (the mount Everest with nearly 9000 m). In the depts of inland, coastal, and open waters are hidden vestiges of past societies, which have always been the subject of fascination and investigation. Underwater photogrammetry is one of the most flexible and widely employed techniques for detailed mapping and 3D modelling in archaeology and environmental studies. This tutorial aims at proving the participants with an introduction to the crucial aspects of underwater photogrammetry as 3D surveying technique and independent methods for the assessment of its accuracy potential. We will go through a brief history of underwater photogrammetry and its key developments, the optical fundamentals of underwater imaging, camera calibration approaches like implicit vs explicit modelling of refraction and their influence on the accuracy of the derived 3D photogrammetric products.
Lecture time: 4h
Target audience: PhD students, researchers, and practitioners. Participants may bring their own computer if they wish to run live demos
Level: beginner to intermediate. A prior knowledge of photogrammetry, surveying and positioning techniques would be a plus
Maximum number of participants: 20
Web-based sharing, utilization, and management of 3D point clouds. From straightforward viewers to complicated platforms to online 3D information systems
Lecturers: Francesco Fassi, Stefano Parri, Piero Quaroni, Franco Spettu
Short description: From both a scientific and a business perspective, a great deal of effort is currently being invested in 3D data fruition. In fact, many survey approaches are now user-friendly and generate vast amounts of data in real time. The issue, however, is how to use them on a regular basis, even by a non-3D specialist audience, as well as how to manage and preserve them. This issue is being addressed by brand-new online platforms that permit online data visualization and utilization on multiple levels. Some of them provide everyone with visible access to the data and simple measurement and hotspot entry functionality, while others are more complex and permit the development of specialized systems. As online information systems, research is increasingly focusing on point cloud-based platforms.
The purpose of the workshop is to provide an overview of the systems on the market, both the simpler and more complex ones, as well as what is happening in the world of research on the topic, with the intention of dissecting issues and unanswered concerns. During the workshop, real-world examples and the application of some of these platforms will be demonstrated to the participants.
Lecture time: 4h
Target audience: PhD students, researchers, and practitioners. Participants need a basic laptop (Win, MacOS) no software required
Level: No skills
Maximum number of participants: 20-30
VR/AR
Lecturers: Fabrizio Banfi, Chiara Stanga
Short description: Today, a building is not just a “body” or a “machine” as defined by modern architecture, but rather an immaterial entity immersed in a digital world where not only its components but also the information associated with it are accounted for. In recent decades, building information modelling (BIM) has made it possible to move from 2D CAD drawings to 3D models capable of supporting different processes and interacting with different disciplines in the AEC industry for storing, documenting and sharing heterogeneous content. It has thus become possible to direct these techniques towards built heritage to investigate new forms of communication. This workshop investigates this evolution in both generative terms (scan-to-BIM process) and cultural and historical terms to orient BIM uses towards novel forms of interactivity and immersion between users and models.
Lecture time: 4h
Target audience: PhD students, researchers, and practitioners. Participants need a basic laptop (Win, MacOS) (but not mandatory).
Level: Knowledge of major software autocad, rhino, revit, archicad (but not mandatory)
Maximum number of participants: 15-20
Image and range-based micro survey
Lecturers: Fausta Fiorillo, Sara Antinozzi
Short description: The demand for 3D reality-based models is growing in popularity and ambition due to the level of realism and detail expected today. The ever-increasing complexity of virtual descriptions is often linked to the size of the objects to be detected, increasing as they decrease and forcing customizations of the adopted acquisition procedures, sometimes on a case-by-case basis. This 4-hour workshop addresses the issues related to the acquisition of small objects with active and passive sensors, from canonical approaches to possible experimental implementations. The aim is to provide participants with all the skills and knowledge required to carry out a photogrammetry acquisition of tiny and complex objects to obtain resolutions of less than a tenth of a millimetre down to a few microns. The practical aspect will be prevalent, with several acquisition setups where participants can personally try their hand with different specialized equipment (Structured Light Scanner, DSLR camera with macro accessories, digital USB microscope). A real case study will be used to understand the necessary tools and workflow in a real environment. To conclude, the data processing section for the generation of digital models and advanced graphic representations will also be addressed.
Lecture time: 4h
Target audience: PhD students, researchers, and practitioners. Participants need a basic laptop (Win, MacOS) mouse required.
Level: Users should know the basics of photography.
Maximum number of participants: 20
Point cloud semantic segmentation using ML /DL approaches
Lecturers: Andrea Masiero, Francesca Matrone, Florent Poux, Roberto Pierdicca
Short description: The ever-improving 3D data acquisition tools provide the opportunity to rapidly generate detailed 3D scenes to support restoration, conservation, maintenance and safeguarding activities of built heritage. The use of Artificial Intelligence techniques, and in particular Deep Learning-based semantic segmentation, can provide valuable support to such a process, by automatically recognizing architectural elements on point clouds. This workshop will deal with the basics of built heritage point cloud data preparation and processing for their semantic segmentation. It will provide the participants with a theoretical framework, practical demos and data processing exercises. The following topics will be addressed: training data preparation, point cloud clustering, segmentation with random forest through Python, image-based deep learning workflow and explainable techniques.
Lecture time: 4h
Target audience: PhD students, researchers, and practitioners. Participants may bring their own laptops.
Level: Beginner-intermediate. Participants should know the basics of point cloud processing. Cloud Compare (https://www.danielgm.net/cc/release/), Google Colab (a Gmail account is required) and Python will be used.
Maximum number of participants: 20