Publication Date:
2019-12-06
Description:
Three di erent non-invasive techniques, namely Structure from Motion (SfM)
photogrammetry, Terrestrial Laser Scanner (TLS) and ultrasonic tomography integrated with
petrographic data, were applied to characterize two rock samples of a di erent nature: A pyroclastic
rock and a carbonate rock. We started a computation of high-resolution 3D models of the two
samples using the TLS technique supported by a digital SfM photogrammetry survey. The resulting
radiometric information available, such as reflectivity maps, SfM photogrammetry textured models
and patterns of geometrical residuals, were interpreted in order to detect and underline surface
materials anomalies by a comparison of reflectance and natural colour anomalies. Starting from the
3D models from previous techniques, a 3D ultrasonic tomography on each rock sample was accurately
planned and carried out in order to detect internal defects or sample heterogeneity. The integration
of the above three geophysical non-invasive techniques with petrographical data—especially with
the textural characteristics of such materials—represents a powerful method for the definition of the
heterogeneity of the rocks at a di erent scale and for calibrating in situ measurements.
Description:
Consorzio Interuniversitario per l’Ingegneria delle Georisorse (CINIGeo), Roma, Italy - Regione Autonoma della Sardegna, Sardegna, Italy
Description:
Published
Description:
id 664
Description:
5T. Sismologia, geofisica e geologia per l'ingegneria sismica
Description:
JCR Journal
Keywords:
Non-invasive techniques
;
Comenditic pyroclastic rock
;
Pietra Forte carbonatic rock
;
terrestrial laser scanner
;
photogrammetry
;
3D acoustic tomography
;
petrographic data
;
integrated interpretation
;
05.04. Instrumentation and techniques of general interest
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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