Results 31 to 40 of about 55,134,654 (225)

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

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 Glacier Ablation With a UAV in the North Cascades: A Structure-from-Motion Approach

Frontiers in Remote Sensing, 2022
The glaciers of the North Cascades have experienced mass loss and terminus retreat due to climate change. The meltwater from these glaciers provides a flux of cold glacier meltwater into the river systems, which supports salmon spawning during the late ...
Shannon M. Healy, Alia L. Khan
doaj   +1 more source

Perceptual Biases in the Interpretation of Non-Rigid Shape Transformations from Motion

Vision
Most existing research on the perception of 3D shape from motion has focused on rigidly moving objects. However, many natural objects deform non-rigidly, leading to image motion with no rigid interpretation.
Ryne Choi, Jacob Feldman, Manish Singh
doaj   +1 more source

Dry Biomass Estimation of Hedge Banks: Allometric Equation vs. Structure from Motion via Unmanned Aerial Vehicle

Journal of Forest Science, 2018
The wood yield of hedge banks is very heterogeneous and hard to estimate in advance. The aim of the present study was to estimate the dry biomass of hedge banks shortly before harvesting using two different non-destructive approaches: (i) allometric ...
Stefan LINGNER, Eiko THIESSEN, Kerrin MÜLLER, Eberhard HARTUNG   +3 more
doaj   +1 more source

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

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

Rough or Noisy? Metrics for Noise Estimation in SfM Reconstructions

Sensors, 2020
Structure from Motion (SfM) can produce highly detailed 3D reconstructions, but distinguishing real surface roughness from reconstruction noise and geometric inaccuracies has always been a difficult problem to solve.
Ivan Nikolov, Claus Madsen
doaj   +1 more source

Capturing complexity: field-testing the use of ‘structure from motion’ derived virtual models to replicate standard measures of reef physical structure [PDF]

PeerJ, 2019
Reef structural complexity provides important refuge habitat for a range of marine organisms, and is a useful indicator of the health and resilience of reefs as a whole.
Daniel T.I. Bayley, Andrew O.M. Mogg, Heather Koldewey, Andy Purvis   +3 more
doaj   +2 more sources

The GPX3‐VCAM1 Axis Gates Pro‐Fibrotic Tubule Cell Fate in Hyperuricemic Nephropathy

Advanced Science, EarlyView.
Hyperuricemia induces NLRP3 inflammasome signaling activation and downregulation of GPX3 in proximal tubular epithelial cells, leading to oxidative stress–driven VCAM1 upregulation, emergence of pro‐fibrotic proximal tubule cells, macrophage recruitment, and renal fibrosis.
Yunfei Qi, Qiang Zhao, Yue Lve, Yaming Yuan, Tingting Zhou, Yue Yuan, Dexi Wu, Yifan Tang, Yan Liu, Zhigang Li, Chunping Jiang, Qiurong Ding   +11 more
wiley   +1 more source