Results 81 to 90 of about 54,994 (234)

The Dynamic Monitoring of River-Ice Thickness on the Qinghai–Tibet Plateau: Four-Dimensional Structure-from-Motion Photogrammetry

Remote Sensing
River-ice, a significant element of the cryosphere, plays a crucial role in hydrological processes. However, the effectiveness of current river-ice monitoring techniques on the Qinghai–Tibet Plateau is limited due to the complex interplay of ...
Yanwei Fan, Yao Zhang, Junfeng Liu, Rensheng Chen, Zijie Lyu, Lei Wang, Xinmao Ao   +6 more
doaj   +1 more source

Estimating millimeter-scale surface roughness of rock outcrops using drone-flyover structure-from-motion (SfM) photogrammetry by applying machine learning model

Earth Science Informatics
A quantitative outcrop survey was conducted in three coastal areas in Japan to estimate the relationship between the surface morphology and visual information of well-exposed rocks using photogrammetry of drone flyovers.
Takumu Nakamura, A. Kioka, Kosuke Egawa, Takuma Ishii, Yasuhiro Yamada   +4 more
semanticscholar   +1 more source

Automated extraction of free surface topography using SfM-MVS photogrammetry

Flow Measurement and Instrumentation, 2017
This paper describes a spatial measurement technique to measure the free surface of natural fluid flows in laboratory applications. This effective solution is based on “Structure-from- Motion/Multi-view Stereo” (SfM-MVS) photogrammetry and is capable of reconstructing water surface morphology, both at an instant and with a high spatial resolution.
Ferreira, Edgar, Chandler, Jim, Wackrow, Rene, Shiono, Koji   +3 more
openaire   +1 more source

As above, so below: A perspective into the application of land‐forest monitoring methods for the assessment of marine animal forests

Methods in Ecology and Evolution, EarlyView.
Abstract Marine animal forests (MAFs) are benthic ecosystems dominated by vertically structuring filter‐ and suspension‐feeders. As terrestrial forests, they are considered biodiversity hotspots, forming canopies, serving as a refuge, nursery, reproduction and feeding shelters for many species.
Torcuato Pulido Mantas, Camilla Roveta, Martina Coppari, Cristina Gioia Di Camillo, Joaquim Garrabou, Nils Lucas Jacobsen, Marco Palma, Ubaldo Pantaleo, Manuja Promodya Hendawitharana, Carlo Cerrano   +9 more
wiley   +1 more source

The application of terrestrial laser scanner and SfM photogrammetry in measuring erosion and deposition processes in two opposite slopes in a humid badlands area (central Spanish Pyrenees) [PDF]

SOIL, 2015
Erosion and deposition processes in badland areas are usually estimated using traditional observations of topographic changes, measured by erosion pins or profile metres (invasive techniques).
E. Nadal-Romero, J. Revuelto, P. Errea, J. I. López-Moreno   +3 more
doaj   +1 more source

Exploiting low-cost 3D imagery for the purposes of detecting and analyzing pavement distresses [PDF]

, 2020
Road pavement conditions have significant impacts on safety, travel times, costs, and environmental effects. It is the responsibility of road agencies to ensure these conditions are kept in an acceptable state.
Di Mino G., Inzerillo L., Roberts R.
core   +1 more source

COPIS: A robust and versatile robotic imaging system for the 3D digitization of natural history specimens with photogrammetry

Methods in Ecology and Evolution, EarlyView.
Abstract Ecologists and evolutionary biologists are increasingly turning to 3D models to use in scientific research. Natural history museums are one of the primary sources for specimens used as 3D models, and efforts are underway to digitize their collections using methods like photogrammetry.
Jeremy D. Pustilnik, Genevieve S. Rios
wiley   +1 more source

Data Fusion of Objects Using Techniques Such as Laser Scanning, Structured Light and Photogrammetry for Cultural Heritage Applications

, 2015
In this paper we present a semi-automatic 2D-3D local registration pipeline capable of coloring 3D models obtained from 3D scanners by using uncalibrated images.
A Gallo, AW Fitzgibbon, DG Lowe, F Bernardini, H Lensch, HH Ip, JH Zhu, K Ikeuchi, M Callieri, M Corsini, M Dellepiane, M Dellepiane, M Pollefeys, MA Fischler, N Snavely, N Snavely, NR Pal, P Musialski, S Arya, SK Naik, Y Furukawa   +20 more
core   +3 more sources

RTK GNSS-Assisted Terrestrial SfM Photogrammetry without GCP: Application to Coastal Morphodynamics Monitoring

Remote Sensing, 2020
The present article describes a new and efficient method of Real Time Kinematic (RTK) Global Navigation Satellite System (GNSS) assisted terrestrial Structure-from-Motion (SfM) photogrammetry without the need for Ground Control Points (GCPs).
M. Jaud, S. Bertin, M. Beauverger, E. Augereau, C. Delacourt   +4 more
semanticscholar   +1 more source

Fats, Fire and Bronze Age Funerary Rites: Organic Residue Analysis of Wide Horizontal Rim Vessels From Burial Contexts in Northwest Portugal

Archaeometry, EarlyView.
ABSTRACT This study presents the first GC‐MS–based analyses of wide horizontal rim vessels with well‐defined funerary contexts, from Middle Bronze Age Portugal (Quinta do Amorim 2 and Pego). Organic residues from two vessels revealed ruminant fats and plant oils, alongside molecular markers of heat exposure.
João Vinícius Back, César Oliveira, Ana M. S. Bettencourt, Hugo Aluai Sampaio, Luciano Vilas Boas, Luís Gonçalves   +5 more
wiley   +1 more source