Anna Forte, Francesca Trevisiol, Giulia Fiorini, Gabriele Bitelli
The integration of infrared thermography (IRT) with high-resolution 3D surveying represents an effective approach in support of non-destructive diagnostics applied to heritage materials. While there has been increasing interest in this area, the numerical incorporation of thermographic data into spatially accurate 3D models poses significant challenges, particularly when it comes to embedding quantitative temperature data directly into geometric datasets. This study introduces a structured and replicable workflow designed to facilitate this numerical integration through the generation of a...
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.005
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Maurizio Porcu, Francesca Biolo, Franco Guzzetti
The research on Castello Sforzesco in Milan developed an integrated 3D information model combining historical sources and contemporary survey technologies. A digital twin was structured through multiple layers of geometric data, organized by attributes and accuracy of the original information. The model quickly proved useful in analyzing theories on hidden underground routes. This potential led to collaboration between the Politecnico and Codevintec Italiana s.r.l., resulting in a wide survey with stepped frequency ground-penetrating radar. The data revealed numerous original structures and...
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.004
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Barbara Fazion, Daniele Treccani, Andrea Adami, Luigi Fregonese
The high-resolution survey of flat surfaces of significant historical and artistic value, such as decorated floors and mosaics, is a fundamental phase both for the documentation and the preservation of cultural heritage. Given the material and chromatic complexity of these objects, it is essential to obtain photogrammetric data that are accurate from both a geometric and radiometric point of view. This study compares two approaches to this task, both involving a typical photogrammetric workflow, but from two different point of view: firstly, an acquisition using a Unmanned Aerial System...
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.003
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Joel Aldrighettoni, Maria Grazia D’Urso
Modern remote sensing techniques from Unmanned Aerial Vehicle (UAV) platforms provide high-precision survey tools for recognizing and measuring minor archaeological remains scattered across the contemporary landscape at risk of loss. In particular, the digital terrain model (DTM) obtained through the classification of the different signal returns of point clouds acquired with LIDAR (Light Detection And Ranging) technique favors a clear identification of archaeological features through the implementation of some specific visualization techniques (Hillshading, Sky View Factor, Openness)....
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.002
· Download
Vincenzo Saverio Alfio, Domenica Costantino, Mathab Fallah, Alfredo Restuccia Garofalo, Massimiliano Pepe, Paolo Piumatti
The proposed work presents an integrated approach for the three-dimensional digitisation and parametric modelling of a historic building, specifically the Church of “Sant’Antonio dei Cappuccini”. The survey involved the combined use of photogrammetric surveys from Unmanned Aerial Vehicle (UAV) and scanning using a handheld Laser Scanner. This multi sensors approach allowed to obtain a detailed point cloud of the structure in rapid and accurate way; in addition, an advanced workflow was implemented to transform the point cloud into a Non-Uniform Rational B-Splines (NURBS) model capable of...
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.001
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Alberto Besozzi, Giovanni Gibertoni, Luigi Rovati, Agostino Gibaldi
In recent years, the prevalence of myopia, caused by elongation of the eye, has increased dramatically. Researchers suggest that both light intensity and the range of viewing distances may influence myopia risk in children, but this remains unconfirmed. Investigating these environmental factors is therefore essential. While wearable devices have been used to gather relevant data, they often fall short, failing to measure spectral light content, estimate viewing distances across the central and near-peripheral visual field, or collect data at eye level. This study introduces a new solution: a...
IMEKO TC2 PhotoMet 2025
· TC2
· 2025
· 10.21014/tc2-2025.021
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Carlo Anelli, Vanessa Pellicorio, Valentina Bello, Sabina Merlo
This paper presents an absorption-based optical approach to check the compliance of urea concentration in AdBlue® with regulatory standards. The implemented low-cost and compact measuring system exploits two LEDs that emit in the SWIR spectral band, a glass capillary, and an amplified photodiode to detect the intensity of the radiation transmitted through the fluid under test. The functionality of the system has been demonstrated on urea–water solutions with urea concentrations from 0 up to 525 mg/mL. Thanks to the attained calibration curve, we retrieved the urea concentration of different...
IMEKO TC2 PhotoMet 2025
· TC2
· 2025
· 10.21014/tc2-2025.020
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Davide Cassanelli, Stefano Cattini, Luigi Rovati
This study investigates how the geometry of illumination affects the visibility of a target as seen by a camera in a foggy environment. The visibility is expressed in MOR (Meteorological Optical Range). An experimental setup was developed using a transparent Fog Chamber (FC) that allows fog generation, enabling visibility variation along the optical path without the need for large-scale fog environments. A moving light source provides the lighting. We compare the MOR calculated with the camera-captured image contrast with a reference MOR estimated with an illumination-independent system. The...
IMEKO TC2 PhotoMet 2025
· TC2
· 2025
· 10.21014/tc2-2025.019
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Marialuisa Tognolina, Egidio D'Angelo
We have developed a custom-made two-photon microscope integrating a spatial light modulator that can modulate the phase of a laser beam and divide it into multiple diffraction-limited beamlets configurable in real time. We used this system to study cerebellar circuit activity and long-term synaptic plasticity expression by simultaneously acquiring stimulus-induced calcium signals from neurons located in different cerebellar layers.
IMEKO TC2 PhotoMet 2025
· TC2
· 2025
· 10.21014/tc2-2025.018
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Parisa Esmaili, Federico Cavedo, Loredana Cristaldi, Michele Norgia
This paper presents the development and characterization of a self-mixing interferometer, especially designed to replace normal accelerometers, used for measuring vibrations to detect defects or malfunctions. The sensor’s design emphasizes minimal footprint with a straightforward baseband signal decoding enabled by the intrinsic distortion in the SMI waveform, resulting in vibration measurement of the target, with a resolution better than 10 nm. Experimental validation on the ISE OneX test bench, equipped with a commercial axial accelerometer and fault-simulated bearings, demonstrates that...
IMEKO TC2 PhotoMet 2025
· TC2
· 2025
· 10.21014/tc2-2025.017
· Download