Results 81 to 90 of about 3,862 (189)

Evaluation of LiDAR‐based canopy trait estimation in Midwestern row crops

The Plant Phenome Journal, Volume 9, Issue 1, December 2026.
Abstract Stand count, the number of plants per unit ground area, and leaf area index (LAI), the ratio of leaf area to ground area, are critical traits for crop research but are traditionally measured using labor‐intensive methods. While new sensing technologies are being developed, quantifying improvement in measurement efficiency and data quality ...
Matthew H. Siebers, Peng Fu, Stephen P. Long, Justin M. McGrath, Carl J. Bernacchi   +4 more
wiley   +1 more source

Unmanned Aerial Systems for Corrosion Detection: Multi‐Sensor Technologies, Challenges, and Opportunities for Next‐Generation Inspection

Quality and Reliability Engineering International, Volume 42, Issue 6, Page 3565-3583, October 2026.
ABSTRACT Corrosion remains a critical threat to the integrity and service life of infrastructure in industries such as oil, gas, construction, renewable energy, and transportation. Traditional inspection methods, being labor‐intensive, hazardous, and often subjective, fall short in addressing modern inspection demands.
Alhossein Alharbi, Yunes Alqudsi, Alhasan Ali Alharbi, Mohammed Basheer Mohiuddin   +3 more
wiley   +1 more source

Deep Reinforcement Learning Based Autonomous Decision‐Making for Cooperative Uncrewed Aerial Vehicles: A Search and Rescue Real World Application

Journal of Field Robotics, Volume 43, Issue 7, Page 4382-4401, October 2026.
ABSTRACT This paper presents the first end‐to‐end framework that combines guidance, navigation, and centralized task allocation for multiple UAVs performing autonomous search‐and‐rescue (SAR) in GNSS‐denied indoor environments. A twin delayed deep deterministic policy gradient controller is trained with an artificial potential field (APF) reward that ...
Thomas Hickling, Maxwell Hogan, Abdulla Tammam, Nabil Aouf   +3 more
wiley   +1 more source

A Semi-Automatic Approach for Tree Crown Competition Indices Assessment from UAV LiDAR

Remote Sensing
Understanding the spatial heterogeneity of forest structure is crucial for comprehending ecosystem dynamics and promoting sustainable forest management. Unmanned aerial vehicle (UAV) LiDAR technology provides a promising method to capture detailed three ...
Nicola Puletti, Matteo Guasti, Simone Innocenti, Lorenzo Cesaretti, Ugo Chiavetta   +4 more
doaj   +1 more source

A review of the research and advancements in MSDF monitoring for the remote sensing of soil and water conservation in China

River, Volume 5, Issue 3, Page 351-368, August 2026.
Abstract With the advancement of remote sensing technology, the accuracy of satellite remote sensing data has continuously improved, and the precision of large‐scale soil and water conservation monitoring has steadily increased. However, owing to differences in sensor acquisition and processing methods, monitoring data obtained through various ...
Wenxiang Liu, Shaohua Lei, Jinsong Shi, Kun Sun, Qiu Jin   +4 more
wiley   +1 more source

An investigation of detecting potholes with UAV LiDAR and UAV Photogrammetry

, 2021
Potholes are caused by erosion and as such always emerging on our roadnetwork. Potholes may not only cause great damages to vehicles, but can alsocause road accidents, which in the worst case are fatal. Today, the detection ofpotholes is usually based on citizen reports or ocular inspection by vehicle,where a loose description of the potholes ...
Hedenström, Linus, Eriksson, Sebastian
openaire   +1 more source

Usage opportunities of generating digital elevation model with unmanned aerial vehicles on forestry

İstanbul Üniversitesi Orman Fakültesi Dergisi, 2016
Unmanned Aerial Vehicles (UAVs) are sustained in flight by aerodynamic lift and guided without an onboard crew, they may be expandeble or recoverable and can fly autonomously or semiautonomously.
Mustafa Akgül, Hüseyin Yurtseven, Murat Demir, Abdullah Emin Akay, Sercan Gülci, Tolga Öztürk   +5 more
doaj   +1 more source

Comparing Drone and Vessel‐Based Imaging to Quantify Epibiont Coverage on Humpback Whales

Marine Mammal Science, Volume 42, Issue 4, October 2026.
ABSTRACT Cetacean epibionts offer noninvasive insights into host health, physiology, and spatial ecology, yet quantitative assessments in wild populations remain scarce. Although vessel‐based observations may be limited by field of view and analyst input, unoccupied aerial vehicles (UAVs; drones) are increasingly used to monitor cetacean health indices,
Isabel A. R. Taylor, Ticiana Fettermann, Barry McGovern, David S. Schoeman, Adrian B. McCallum, Stephanie H. Stack   +5 more
wiley   +1 more source

Silicon Photonic Beam Steerer Based on Metalens Focal Plane Array

Nanophotonics, Volume 15, Issue 17, 11 September 2026.
A silicon photonic beam steerer based on a metalens focal plane array (FPA) monolithically integrates the collimation lens on‐chip while enabling blind‐spot‐free continuous beam steering. Thermo‐optic prisms provide continuous fine‐tuning and more than double the number of resolvable points.
Chung‐Yu Hsu, Ping‐Yen Hsieh, Hsun‐Sung Chiu, Li‐Jun Tung, Chieh‐Chih Yu, Ko‐Chi Chen, Yu‐Heng Hong, Hao‐Chung Kuo, Chi‐Wai Chow, You‐Chia Chang   +9 more
wiley   +1 more source

Measuring prairie snow water equivalent with combined UAV-borne gamma spectrometry and lidar [PDF]

The Cryosphere
Despite decades of effort, there remains an inability to measure snow water equivalent (SWE) at high spatial resolutions using remote sensing. Passive gamma ray spectrometry is one of the only well-established methods to reliably remotely sense SWE, but ...
P. Harder, W. D. Helgason, W. D. Helgason, J. W. Pomeroy   +3 more
doaj   +1 more source