High Resolution Airborne Laser Scanning and Hyperspectral Imaging With a Small Uav Platform

Gallay, Michal; Eck, Christoph; Zgraggen, Carlo; Kaňuk, Ján; Dvorný, Eduard

doi:10.5194/isprs-archives-xli-b1-823-2016

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…This also enables the use of small‐form factor laser scanners (such as the Velodyne LiDAR Puck, https://velodynelidar.com/vlp-16.html) to acquire UAV‐based laser scanning (ULS). Originally, the majority of these systems relied on large UAVs (Deng, Zhu, Li, & Li, ; Gallay, Eck, Zgraggen, Kanuk, & Dvorny, ; Lin, Hyyppa, & Jaakkola, ; Nagai, Chen, Shibasaki, Kumagai, & Ahmed, ); however, lightweight systems have been developed, which can be mounted onto smaller platforms (Jaakkola et al, ; Mader, Blaskow, Westfeld, & Maas, ; Nakano, Suzuki, Omori, Hayakawa, & Kurodai, ; Roca, Martinez‐Sanchez, Laguela, & Arias, ; Tommaselli & Torres, ). Currently, the high‐accuracy GNSS and IMU systems required for ULS and direct georeferencing are expensive (upwards of £20K for ULS and ~£5K for direct georeferencing at the time of writing).…”

Section: The State Of the Artmentioning

confidence: 99%

“…UAV surveys that utilise multiple sensor payloads have focussed on combining laser scanners and imagery for disaster recovery and river monitoring (Nagai et al, ); high temporal, spatial, and spectral resolution landscape dynamics research (Gallay et al, ); and forestry mapping (Jaakkola et al, ). However, most studies currently focus on the use of one sensor on UAV deployments due to weight implications relating to flight time endurance.…”

Section: The State Of the Artmentioning

confidence: 99%

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Remote sensing of river corridors: A review of current trends and future directions

Tomsett

Leyland

2019

River Research & Apps

112

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River corridors play a crucial environmental, economic, and societal role yet also represent one of the world's most dangerous natural hazards, making monitoring imperative to improve our understanding and to protect people. Remote sensing offers a rapidly growing suite of methods by which river corridor monitoring can be performed efficiently, at a range of scales and in difficult environmental conditions. This paper aims to evaluate the current state and assess the potential future of river corridor monitoring, whilst highlighting areas that require further investigation. We initially review established methods that are used to undertake river corridor monitoring, framed by the context and scales upon which they are applied. Subsequently, we review cutting edge technologies that are being developed and focussed around unmanned aerial vehicle and multisensor system advances. We also "horizon scan" for future methods that may become increasingly prominent in research and management, citing examples from within and outside of the fluvial domain. Through review of the literature, it has become apparent that the main gap in fluvial remote sensing lies in the trade-off between resolution and scales. However, prioritising process measurements and simultaneous multisensor data collection is likely to offer a bigger advance in understanding than purely from better surveying methods alone. Challenges regarding the legal deployment of more complex systems, as well as effectively disseminating data into the science community, are amongst those that we propose need addressing. However, the plethora of methods currently available means that researchers and monitoring agencies will be able to identify suitable techniques for their needs.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: The State Of the Artmentioning

confidence: 99%

Section: The State Of the Artmentioning

confidence: 99%

Remote sensing of river corridors: A review of current trends and future directions

Tomsett

Leyland

2019

River Research & Apps

112

View full text Add to dashboard Cite

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“…Laser positioning system has been explored by Guerra et al [1] for a long time, Gallay et al [2] gradually improved the maturity of photoelectric technology and Lu et al [3] further discussed the electronic technology. Laser rangefinder products have gone through three generations, and have been updated to the third generation.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Distance measurement is achieved by calculating the distance of laser propagation in the time interval between the transmitted signal and the echo signal, as shown in formulas (1), (2), and (3): Δt and 2 Δt are the time for the laser pulse to refract back to the O point after it reaches the position P1, P2, and P3 from the detection origin O, respectively. On the basis of completing distance measurement, the altitude information of low, slow, and small target is obtained by measuring the inclination of the detection device and further processing, as shown in formulas (4), (5), and (6):…”

Section: Measuring Principlementioning

confidence: 99%

Intelligent Navigation Design of Fully Autonomous Unmanned Aerial Vehicle Based on Laser Positioning

2019

IJOMAM

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In order to study the intelligent navigation design of fully autonomous UAV (Unmanned Aerial Vehicle) for laser positioning, the laser positioning UAV is mainly discussed. An intelligent navigation design system of fully autonomous UAV based on laser positioning is adopted, which can be used not only for material measurement in large mines and wharfs, but also for mine safety and intelligent mining system. Compared with radar technology, acoustic detection and radio scanning, this method has the characteristics of high efficiency and easy realization, and is more suitable for the detection and positioning of low-speed flying small targets in ultra-low altitude visual range. Finally, the software of the system is programmed, including time, inclination, pendulum, positioning and other measurements. The experimental results are illustrated by flow chart. Laser positioning is designed separately according to the actual needs. The UAV and GPS (Global Position System) positioning sensor system are studied and analysed, and the two are combined to get three-dimensional coordinates. The test results show that the system can basically fulfill the requirement of autonomous range of laser positioning, and provide data support for the later positioning system.

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“…These drone platforms offer interesting capabilities, provided one has adequate algorithms for georeferencing and radiometric corrections. Several studies refer mainly to helicopters or fixed-wing UAVs, designed to support large and heavy (>5 kg) payloads [25][26][27][28]. However, helicopters generate high frequency vibrations and require specially trained operators.…”

Section: Introductionmentioning

confidence: 99%

Easily Implemented Methods of Radiometric Corrections for Hyperspectral–UAV—Application to Guianese Equatorial Mudbanks Colonized by Pioneer Mangroves

et al. 2021

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Hyper-DRELIO (Hyperspectral DRone for Environmental and LIttoral Observations) is a custom, mini-UAV (unmanned aerial vehicle) platform (<20 kg), equipped with a light push broom hyperspectral sensor combined with a navigation module measuring position and orientation. Because of the particularities of UAV surveys (low flight altitude, small spatial scale, and high resolution), dedicated pre-processing methods have to be developed when reconstructing hyperspectral imagery. This article presents light, easy-implementation, in situ methods, using only two Spectralon® and a field spectrometer, allowing performance of an initial calibration of the sensor in order to correct “vignetting effects” and a field standardization to convert digital numbers (DN) collected by the hyperspectral camera to reflectance, taking into account the time-varying illumination conditions. Radiometric corrections are applied to a subset of a dataset collected above mudflats colonized by pioneer mangroves in French Guiana. The efficiency of the radiometric corrections is assessed by comparing spectra from Hyper-DRELIO imagery to in situ spectrometer measurements above the intertidal benthic biofilm and mangroves. The shapes of the spectra were consistent, and the spectral angle mapper (SAM) distance was 0.039 above the benthic biofilm and 0.159 above the mangroves. These preliminary results provide new perspectives for quantifying and mapping the benthic biofilm and mangroves at the scale of the Guianese intertidal mudbanks system, given their importance in the coastal food webs, biogeochemical cycles, and the sediment stabilization.

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High Resolution Airborne Laser Scanning and Hyperspectral Imaging With a Small Uav Platform

Cited by 12 publications

References 10 publications

Remote sensing of river corridors: A review of current trends and future directions

Remote sensing of river corridors: A review of current trends and future directions

Intelligent Navigation Design of Fully Autonomous Unmanned Aerial Vehicle Based on Laser Positioning

Easily Implemented Methods of Radiometric Corrections for Hyperspectral–UAV—Application to Guianese Equatorial Mudbanks Colonized by Pioneer Mangroves

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