Results 41 to 50 of about 7,756 (237)

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

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

Light3R-SfM: Towards Feed-forward Structure-from-Motion

CoRR
We present Light3R-SfM, a feed-forward, end-to-end learnable framework for efficient large-scale Structure-from-Motion (SfM) from unconstrained image collections. Unlike existing SfM solutions that rely on costly matching and global optimization to achieve accurate 3D reconstructions, Light3R-SfM addresses this limitation through a novel latent global ...
Sven Elflein, Qunjie Zhou, Sérgio Agostinho, Laura Leal-Taixé   +3 more
openaire   +3 more sources

Multi-light photogrammetric survey applied to the complex documentation of engravings in Palaeolithic rock art: the Cova de les Meravelles (Gandia, Valencia, Spain)

Heritage Science, 2022
The new phase of study and revision of the Palaeolithic art of the Cova de les Meravelles, as well as the advances made in the field of 3D documentation in recent years, have motivated a new documentation campaign on the main panel full of tiny engraved ...
Ana Cantó, José Luis Lerma, Rafael Martínez Valle, Valentín Villaverde   +3 more
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

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   +2 more sources

The potential of small unmanned aircraft systems and structure-from-motion for topographic surveys: a test of emerging integrated approaches at Cwm Idwal, North Wales [PDF]

, 2014
Novel topographic survey methods that integrate both structure-from-motion (SfM) photogrammetry and small unmanned aircraft systems (sUAS) are a rapidly evolving investigative technique. Due to the diverse range of survey configurations available and the
Nicholas G. Midgley (7190381), Toby N. Tonkin (7190366), David Graham (1229835), Graham, DJ, Tonkin, TN, Midgley, NG, Labadz, JC, J.C. Labadz (7190975)   +7 more
core   +1 more source

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

Democratizing photogrammetry: an accuracy perspective

Geo-spatial Information Science, 2023
Photogrammetry is experiencing an era of democratization mostly due to the popularity and availability of many commercial off-the-shelf devices, such as drones and smartphones.
Jie Shan, Zhixin Li, Damon Lercel, Kevan Tissue, Joseph Hupy, Joshua Carpenter   +5 more
doaj   +1 more source

Identifying mechanisms of shore platform erosion using Structure‐from‐Motion (SfM) photogrammetry [PDF]

Earth Surface Processes and Landforms, 2019
AbstractShore platforms control wave energy transformation which, in turn, controls energy delivery to the cliff toe and nearshore sediment transport. Insight into shore platform erosion rates has conventionally been constrained at millimetre‐scales using micro‐erosion metres, and at metre‐scales using cartographic data.
Zuzanna M. Swirad, Nick J. Rosser, Matthew J. Brain   +2 more
openaire   +2 more sources