Results 41 to 50 of about 54,994 (234)

Microscopic Structure from Motion (SfM) for Microscale 3D Surface Reconstruction

Sensors, 2020
In microscale photogrammetry, the confocal microscopic imaging technique has been the dominant trend. Unlike the confocal imaging mostly for transparent objects, we propose a novel method to construct a 3D shape in microscale for various micro-sized ...
Dugan Um, Sangsoo Lee
doaj   +1 more source

UAV Video-Based Approach to Identify Damaged Trees in Windthrow Areas

Remote Sensing, 2022
Disturbances in forest ecosystems are expected to increase by the end of the twenty-first century. An understanding of these disturbed areas is critical to defining management measures to improve forest resilience.
Flavio Furukawa, Junko Morimoto, Nobuhiko Yoshimura, Takashi Koi, Hideaki Shibata, Masami Kaneko   +5 more
doaj   +1 more source

Automated classification of three-dimensional reconstructions of coral reefs using convolutional neural networks [PDF]

, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hopkinson, B. M., King, A. C., Owen, D. P., Johnson-Roberson, M., Long, M. H., & Bhandarkar, S.
Bhandarkar, Suchendra M., Hopkinson, Brian M., Johnson-Roberson, Matthew, King, Andrew C., Long, Matthew H., Owen, Daniel P.   +5 more
core   +1 more source

Terrain changes from images acquired on opportunistic flights by SFM photogrammetry [PDF]

The Cryosphere, 2016
Abstract. Structure from motion (SfM) photogrammetric techniques are emerging as powerful tools for surveying, at very high spatial and temporal resolution, geomorphological objects undergoing relatively rapid change, such as glaciers, moraines, or landslides. Modern software and computing power allows production of accurate data from low-cost surveys,
Luc Girod, Christopher Nuth, Andreas Kääb, Bernd Etzelmüller, Jack Kohler   +4 more
openaire   +3 more sources

Rapid tunnel scanning using a 360-degree camera and SfM photogrammetry

IOP Conference Series: Earth and Environmental Science, 2023
Abstract Photogrammetric scanning can be employed for the digitization of underground spaces, for example for remote mapping, visualization, or training purposes. However, such a technique requires capturing many photos, which can be laborious and time-consuming. Previous research has demonstrated that the acquisition time can be reduced
Prittinen, Markus, Torkan, Masoud, Uotinen, Lauri, Janiszewski, Mateusz   +4 more
openaire   +3 more sources

TRIANGULATION AND TIME-OF-FLIGHT BASED 3D DIGITISATION TECHNIQUES OF CULTURAL HERITAGE STRUCTURES [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
This study aims to introduce triangulation and ToF measurement techniques used in three-dimensional modelling of cultural heritages. These measurement techniques are traditional photogrammetry, SfM approach, laser scanning and time-of-flight camera.
C. Altuntas
doaj   +1 more source

Predicting growing stock volume of Eucalyptus plantations using 3-D point clouds derived from UAV imagery and ALS data [PDF]

, 2019
Estimating forest inventory variables is important in monitoring forest resources and mitigating climate change. In this respect, forest managers require flexible, non-destructive methods for estimating volume and biomass.
Botequim, Brigite, Cardil, Adrian, Cozensa, Diogo N., Diaz-Varela, Ramón, González-Ferreiro, Eduardo, Guerra-Hernández, Juan, Silva, Carlos Alberto, Silva, Margarida, Soares, Paula   +8 more
core   +2 more sources

Ground Control Point Distribution for Accurate Kilometre-Scale Topographic Mapping Using an RTK-GNSS Unmanned Aerial Vehicle and SfM Photogrammetry

Drones, 2020
Unmanned Aerial Vehicles (UAVs) have revolutionised the availability of high resolution topographic data in many disciplines due to their relatively low-cost and ease of deployment.
Eilidh Stott, R. Williams, T. Hoey
semanticscholar   +1 more source

Quantification of Coastal Change and Preliminary Sediment Budget Calculation Using SfM Photogrammetry and Archival Aerial Imagery

Géosciences, 2022
A preliminary sediment budget for the sandy shores flanking the entrance to Western Port, a large bay in Australia, was formulated using a comparison between two Digital Surface Models (DSMs) with a 30-year interval and auxiliary shoreline data. The 1977
R. Carvalho, R. Reef
semanticscholar   +1 more source

Innovative strategies for 3D visualisation using photogrammetry and 3D scanning for mobile phones [PDF]

, 2019
3D model generation through Photogrammetry is a modern overlay of digital information representing real world objects in a virtual world. The immediate scope of this study aims at generating 3D models using imagery and overcoming the challenge of ...
Dempster, Euan, Lyons, David, Munir, Verda   +2 more
core   +2 more sources