Results 51 to 60 of about 7,708 (206)

DIVERS-OPERATED UNDERWATER PHOTOGRAMMETRY: APPLICATIONS IN THE STUDY OF ANTARCTIC BENTHOS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Abstract. Ecological studies about marine benthic communities received a major leap from the application of a variety of non-destructive sampling and mapping techniques based on underwater image and video recording. The well-established scientific diving practice consists in the acquisition of single path or ‘round-trip’ over elongated transects, with ...
P. Piazza, P. Piazza, V. Cummings, D. Lohrer, S. Marini, P. Marriott, F. Menna, E. Nocerino, E. Nocerino, A. Peirano, S. Schiaparelli, S. Schiaparelli   +11 more
openaire   +7 more sources

Experimental Activity with a Rover for Underwater Inspection

Actuators
The inspection of underwater structures is often hampered by harsh environmental conditions, limited access, high costs, and inherent safety issues.
Erika Ottaviano, Agnese Testa, Pierluigi Rea, Marco Saccucci, Assunta Pelliccio, Maurizio Ruggiu   +5 more
doaj   +1 more source

Underwater optical metrology for precision monitoring of marine habitats: the MANATEE project [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Marine habitats are subject to monitoring activities to assess the impact of climate change, as required by EU and national directives. Coralligenous reefs are typical Mediterranean underwater seascapes, which originate from the growth of calcareous ...
E. Nocerino, E. Nocerino, F. Menna, A. Calantropio, F. Pinna, S. Del Pizzo, S. Farina, A. Giaquinto, A. Lambertini, M. Menghini, S. Mokhtari, F. Ragazzola, S. Troisi, L. Vittuari   +13 more
doaj   +1 more source

Towards real-time underwater photogrammetry for subsea metrology applications [PDF]

OCEANS 2019 - Marseille, 2019
High accuracy underwater inspections are getting more and more important in the underwater industry where time and cost optimization represent nowadays the main innovation drivers. The subsea industry is undergoing a digital transformation process and for this reason, methods that can provide real-time accurate 3D digital measurements are increasingly ...
Menna, Fabio, Nocerino, Erica, Nawaf, Mohammad Motasem, Seinturier, Julien, Torresani, Alessandro, Drap, Pierre, Remondino, Fabio, Chemisky, Bertrand   +7 more
openaire   +1 more source

UNDERWATER PHOTOGRAMMETRY DIGITAL SURFACE MODEL (DSM) OF THE SUBMERGED SITE OF THE ANCIENT LIGHTHOUSE NEAR QAITBAY FORT IN ALEXANDRIA, EGYPT [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Underwater photogrammetry in archaeology in Egypt is a completely new experience applied for the first time on the submerged archaeological site of the lighthouse of Alexandria situated on the eastern extremity of the ancient island of Pharos at the foot
M. Abdelaziz, M. Elsayed
doaj   +1 more source

Quick bathymetry mapping of a Roman archaeological site using RTK UAS-based photogrammetry

Frontiers in Earth Science, 2023
Recent technological advances are leading numerous researchers and professional users to the adoption of photogrammetric products for a wide range of geoscientific applications.
Davide Mazza, Luigi Parente, Daniele Cifaldi, Agostino Meo, Maria Rosaria Senatore, Francesco Maria Guadagno, Paola Revellino   +6 more
doaj   +1 more source

Moving to 3D: relationships between coral planar area, surface area and volume. [PDF]

, 2017
Coral reefs are a valuable and vulnerable marine ecosystem. The structure of coral reefs influences their health and ability to fulfill ecosystem functions and services.
Bidaut, Luc M, Brambilla, Viviana, Christie, Alec P, Dornelas, Maria, House, Jenny E, Madin, Joshua S, Pizarro, Oscar   +6 more
core   +5 more sources

A new 3-D modelling method to extract subtransect dimensions from underwater videos [PDF]

, 2012
Underwater video transects have become a common tool for quantitative analysis of the seafloor. However a major difficulty remains in the accurate determination of the area surveyed as underwater navigation can be unreliable and image scaling does not ...
Fillinger, Laura, Funke, Tobias
core   +2 more sources

Automated Feature Extraction and Classification of Submerged Cultural Heritage Assets in the Puck Lagoon via Multisensor Remote Sensing

Archaeological Prospection, EarlyView.
ABSTRACT This study presents a strong framework for the detection and classification of Submerged Cultural Heritage Assets (SCHA) in shallow marine environments using the integration of multibeam echosounder and airborne LiDAR bathymetry with object‐based image analysis and fuzzy logic–based classification.
Łukasz Janowski, Andrzej Pydyn, Mateusz Popek, Anna M. Kotarba‐Morley, Paweł Tysiąc   +4 more
wiley   +1 more source

DEEP LEARNING FOR SEMANTIC SEGMENTATION OF CORAL IMAGES IN UNDERWATER PHOTOGRAMMETRY

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Abstract. Regular monitoring activities are important for assessing the influence of unfavourable factors on corals and tracking subsequent recovery or decline. Deep learning-based underwater photogrammetry provides a comprehensive solution for automatic large-scale and precise monitoring.
H. Zhang, A. Gruen, M. Li, M. Li
openaire   +4 more sources