Results 21 to 30 of about 55,134,575 (221)

High spatial resolution underwater data for mapping seagrass transplantation: A powerful tool for visualization and analysis

Data in Brief, 2022
These datasets derived from our mapping protocol are presented as a research article in the Journal of Environmental Management [1]. In particular, by using a Structure from Motion photogrammetric workflow we produced high spatial resolution 2D raster ...
Daniele Ventura, Luca Castoro, Gianluca Mancini, Edoardo Casoli, Daniela Silvia Pace, Andrea Belluscio, Giandomenico Ardizzone   +6 more
doaj   +1 more source

Structure from Motion and Archaeological Excavation: Experiences of the Via Consolare Project in Pompeii

Studies in Digital Heritage, 2021
The last decade of advances in Image-Based Modeling (IBM) data acquisition based on Structure from Motion (SfM) have made it possible as never before to record excavated archaeological deposits, historical architectural remains, artifacts, and ...
Michael Andrew Anderson
doaj  

Unmanned Aerial Vehicle-Based Structure from Motion Technique for Precise Snow Depth Retrieval—Implication for Optimal Ground Control Point Deployment Strategy

Remote Sensing, 2023
Unmanned aerial vehicle (UAV)-based snow depth is mapped as the difference between snow-on and snow-off digital surface models (DSMs), which are derived using the structure from motion (SfM) technique with ground control points (GCPs).
Song Shu, Ok-Youn Yu, Chris Schoonover, Hongxing Liu, Bo Yang   +4 more
doaj   +1 more source

Quantifying the Influence of Surface Texture and Shape on Structure from Motion 3D Reconstructions

Sensors, 2022
In general, optical methods for geometrical measurements are influenced by the surface properties of the examined object. In Structure from Motion (SfM), local variations in surface color or topography are necessary for detecting feature points for point-
Mikkel Schou Nielsen, Ivan Nikolov, Emil Krog Kruse, Jørgen Garnæs, Claus Brøndgaard Madsen   +4 more
doaj   +1 more source

Integrating a UAV-Derived DEM in Object-Based Image Analysis Increases Habitat Classification Accuracy on Coral Reefs

Remote Sensing, 2022
Very shallow coral reefs (
Brian O. Nieuwenhuis, Fabio Marchese, Marco Casartelli, Andrea Sabino, Sancia E. T. van der Meij, Francesca Benzoni   +5 more
doaj   +1 more source

A Skeletal Camera Network for Close-range Images with a Data Driven Approach in Analyzing Stereo Configuration [PDF]

Journal of Geodesy and Geoinformation Science, 2022
Structure-from-Motion (SfM) techniques have been widely used for 3D geometry reconstruction from multi-view images. Nevertheless, the efficiency and quality of the reconstructed geometry depends on multiple factors, i.e., the base-height ratio ...
Zhihua XU,Lingling QU
doaj   +1 more source

A New Method for High Resolution Surface Change Detection: Data Collection and Validation of Measurements from UAS at the Nevada National Security Site, Nevada, USA

Drones, 2021
The use of uncrewed aerial systems (UAS) increases the opportunities for detecting surface changes in remote areas and in challenging terrain. Detecting surface topographic changes offers an important constraint for understanding earthquake damage ...
Brandon Crawford, Erika Swanson, Emily Schultz-Fellenz, Adam Collins, Julian Dann, Emma Lathrop, Damien Milazzo   +6 more
doaj   +1 more source

Comparing Forest Structural Attributes Derived from UAV-Based Point Clouds with Conventional Forest Inventories in the Dry Chaco

Remote Sensing, 2020
Anthropogenic activity leading to forest structural and functional changes needs specific ecological indicators and monitoring techniques. Since decades, forest structure, composition, biomass, and functioning have been studied with ground-based forest ...
Beatriz Gobbi, Anton Van Rompaey, Dante Loto, Ignacio Gasparri, Veerle Vanacker   +4 more
doaj   +1 more source

Quantifying Tufa Growth Rates (TGRs) using Structure-from-Motion (SfM) Photogrammetry

Proceedings of the 6th International Conference on Geographical Information Systems Theory, Applications and Management, 2020
The production of high-quality digital surface models (DSMs) is an increasing interest throughout the various geomorphometry studies. Consequently, a wide range of advanced geospatial methods has been used at different scales. Despite the fact that Structure-from-Motion (SfM) photogrammetry is one of the most popular methods until now it has not been ...
Marić, Ivan, Šiljeg, Ante, Cukrov, Neven, Domazetović, Fran   +3 more
openaire   +3 more sources

Mapping Wild Leek through the Forest Canopy Using a UAV

Remote Sensing, 2018
Wild leek, an endangered plant species of Eastern North America, grows on forest floors and greens up to approximately three weeks before the trees it is typically found under, temporarily allowing it to be observed through the canopy by remote sensing ...
Marie-Bé Leduc, Anders J. Knudby
doaj   +1 more source