U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "lidar" Remove constraint Subject: "lidar"
Start Over

Search

5,723  Search Results

« Previous | 1 - 20 of 5,723 |
Number of results to display per page

Search Results

1. Eye-Safe Aerosol and Cloud Lidar Based on Free-Space Intracavity Upconversion Detection

Author:
Wenjie Yue; Tao Chen; Wei Kong; Xin Chen; Genghua Huang; Rong Shu
Source:
Remote Sensing 2022 v.14 no.12 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; aerosols; evolution;     Show all 3 Subjects
Abstract:
... We report an eye-safe aerosol and cloud lidar with an Erbium-doped fiber laser (EDFL) and a free-space intracavity upconversion detector as the transmitter and receiver, respectively. The EDFL was home-made, which could produce linearly-polarized pulses at a repetition rate of 15 kHz with pulse energies of ~70 μJ and pulse durations of ~7 ns centered at 1550 nm. The echo photons were upconverted t ...
DOI:
10.3390/rs14122934

2. Rapid Linear Frequency Swept Frequency-Modulated Continuous Wave Laser Source Using Iterative Pre-Distortion Algorithm

Author:
Peng Li; Yating Zhang; Jianquan Yao
Source:
Remote Sensing 2022 v.14 no.14 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; algorithms; semiconductors;     Show all 3 Subjects
Abstract:
... We present a simple iterative pre-distortion algorithm for achieving a rapid linear frequency sweep of semiconductor lasers. The algorithm achieves the desired frequency swept linearity with only four iterations. We derive a general formula for iterative pre-distortion by establishing the relationship between the laser output frequency and the drive current. The linear frequency-swept laser source ...
DOI:
10.3390/rs14143455

3. Varying Amplitude Vibration Phase Suppression Algorithm in ISAL Imaging

Author:
Hongfei Yin; Liang Guo; Yachao Li; Liang Han; Mengdao Xing; Xiaodong Zeng
Source:
Remote Sensing 2022 v.14 no.5 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; algorithms; vibration;     Show all 3 Subjects
Abstract:
... Platform vibration introduces sinusoidal modulation in inverse synthetic aperture lidar (ISAL) imaging, which causes paired echoes in ISAL imaging. In this paper, a varying amplitude vibration phase suppression algorithm is proposed. Working without prior knowledge, the proposed algorithm can suppress paired echoes under the condition of varying vibration amplitude and will not introduce new phase ...
DOI:
10.3390/rs14051122

4. Changes in Land Relief in Urbanised Areas Using Laser Scanning and Archival Data on the Example of Łódź (Poland)

Author:
Marcin Jaskulski; Iwona Jażdżewska; Aleksander Szmidt
Source:
Remote Sensing 2022 v.14 no.13 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; morphometry; urbanization; Poland;     Show all 4 Subjects
Abstract:
... The authors undertook to examine and analyse the changes in the relief in Łódź city centre over a period of over one hundred years. Archival cartographic resources containing morphometric information and contemporary laser scanning data (LIDAR) are used to analyse changes. This required appropriate transformation of these data to generate a differential relief map. Information on the geographical ...
DOI:
10.3390/rs14132961

5. A New Systematic Framework for Optimization of Multi-Temporal Terrestrial LiDAR Surveys over Complex Gully Morphology

Author:
Fran Domazetović; Ante Šiljeg; Ivan Marić; Lovre Panđa
Source:
Remote Sensing 2022 v.14 no.14 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; landscapes; soil; Croatia;     Show all 4 Subjects
Abstract:
... Terrestrial LiDAR scanning (TLS) has in preceding years emerged as one of the most accurate and reliable geospatial methods for the creation of very-high resolution (VHR) models over gullies and other complex geomorphic features. Rough terrain morphology and rapid erosion induced spatio-temporal changes (STCs) can lead to significant challenges in multi-temporal field TLS surveys. In this study, w ...
DOI:
10.3390/rs14143366

6. Research of Distance-Intensity Imaging Algorithm for Pulsed LiDAR Based on Pulse Width Correction

Author:
Shiyu Yan; Guohui Yang; Qingyan Li; Yue Wang; Chunhui Wang
Source:
Remote Sensing 2022 v.14 no.3 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; algorithms; cost effectiveness;     Show all 3 Subjects
Abstract:
... Walking error has been problematic for pulsed LiDAR based on a single threshold comparator. Traditionally, walk error must be suppressed by some time discrimination methods with extremely complex electronic circuits and high costs. In this paper, we propose a compact and flexible method for reducing walk error and achieving distance-intensity imaging. A single threshold comparator and commercial t ...
DOI:
10.3390/rs14030507

7. A Supervoxel-Based Random Forest Method for Robust and Effective Airborne LiDAR Point Cloud Classification

Author:
Lingfeng Liao; Shengjun Tang; Jianghai Liao; Xiaoming Li; Weixi Wang; Yaxin Li; Renzhong Guo
Source:
Remote Sensing 2022 v.14 no.6 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; data collection; photogrammetry;     Show all 3 Subjects
Abstract:
... As an essential part of point cloud processing, autonomous classification is conventionally used in various multifaceted scenes and non-regular point distributions. State-of-the-art point cloud classification methods mostly process raw point clouds, using a single point as the basic unit and calculating point cloud features by searching local neighbors via the k-neighborhood method. Such methods t ...
DOI:
10.3390/rs14061516

8. Aeronautics Application of Direct-Detection Doppler Wind Lidar: An Adapted Design Based on a Fringe-Imaging Michelson Interferometer as Spectral Analyzer

Author:
Patrick Vrancken; Jonas Herbst
Source:
Remote Sensing 2022 v.14 no.14 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; instrumentation; interferometers; wind;     Show all 4 Subjects
Abstract:
... We report on the development of a novel direct-detection Doppler wind lidar (DD-DWL) within the strong requirements of an aeronautic feed-forward control application for gust load alleviation (GLA). This DD-DWL is based on fringe imaging of the Doppler-shifted backscatter of ultraviolet laser pulses in a field-widened Michelson interferometer (FW-FIMI) using a fast linear photodetector. The double ...
DOI:
10.3390/rs14143356

9. LIDAR-Inertial Real-Time State Estimator with Rod-Shaped and Planar Feature

Author:
Hong Liu; Shuguo Pan; Wang Gao; Chun Ma; Fengshuo Jia; Xinyu Lu
Source:
Remote Sensing 2022 v.14 no.16 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; data collection; models;     Show all 3 Subjects
Abstract:
... State estimation and mapping based on Light Detection and Ranging (LIDAR) are important for autonomous systems. Point cloud registration is a crucial module affecting the accuracy and real-time performance of LIDAR simultaneous localization and mapping (SLAM). In this paper, a novel point cloud feature selection for LIDAR-inertial tightly coupled systems is proposed. In the front-end, a point clou ...
DOI:
10.3390/rs14164031

10. On-Orbit Calibration for Spaceborne Line Array Camera and LiDAR

Author:
Xiangpeng Xu; Sheng Zhuge; Banglei Guan; Bin Lin; Shuwei Gan; Xia Yang; Xiaohu Zhang
Source:
Remote Sensing 2022 v.14 no.12 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; cameras; models; satellites;     Show all 4 Subjects
Abstract:
... For a multi-mode Earth observation satellite carrying a line array camera and a multi-beam line array LiDAR, the relative installation attitude of the two sensors is of great significance. In this paper, we propose an on-orbit calibration method for the relative installation attitude of the camera and the LiDAR with no need for the calibration field and additional satellite attitude maneuvers. Fir ...
DOI:
10.3390/rs14122949

11. Evaluation of LiDAR for the Free Navigation in Agriculture

Author:
Matthias Reger; Jörn Stumpenhausen; Heinz Bernhardt
Source:
AgriEngineering 2022 v.4 no.2 pp. 489-506
ISSN:
2624-7402
Subject:
lidar,   etc   ; automation; risk reduction; weather;     Show all 4 Subjects
Abstract:
... Driverless transport systems (DTS) or automated guided vehicles (AGV) have been part of intralogistics for over six decades. The uniform and structured environment conditions in industrial halls provided the ideal conditions for simple automation, such as in goods transport. Initially, implementing simply-designed safety devices, e.g., bumpers, could reduce risk to an acceptable level. However, th ...
DOI:
10.3390/agriengineering4020033

12. GTASynth: 3D synthetic data of outdoor non-urban environments.

Author:
Giovanni Curnis; Simone Fontana; Domenico G. Sorrenti
Source:
Data in Brief 2022 v.43 pp. 108412
ISSN:
2352-3409
Subject:
lidar,   etc   ; cameras; data collection; games;     Show all 4 Subjects
Abstract:
... Developing point clouds registration, SLAM or place recognition algorithms requires data with a high quality ground truth (usually composed of a position and orientation). Moreover, many machine learning algorithms require large amounts of data for training. However, acquiring this kind of data in non-urban outdoor environments poses several challenges. First of all, off-road robots are usually ve ...
DOI:
10.1016/j.dib.2022.108412

13. LiDAR Reveals the Process of Vision-Mediated Predator–Prey Relationships

Author:
Yanwen Fu; Guangcai Xu; Shang Gao; Limin Feng; Qinghua Guo; Haitao Yang
Source:
Remote Sensing 2022 v.14 no.15 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; animal behavior; biodiversity; nests;     Show all 4 Subjects
Abstract:
... Exploring the processes of interspecific relationships is crucial to understanding the mechanisms of biodiversity maintenance. Visually detecting interspecies relationships of large mammals is limited by the reconstruction accuracy of the environmental structure and the timely detection of animal behavior. Hence, we used backpack laser scanning (BLS) to reconstruct the high-resolution three-dimens ...
DOI:
10.3390/rs14153730

14. The “Fuzzy” Repair of Urban Building Facade Point Cloud Based on Distribution Regularity

Author:
Zijian Zhang; Xiaojun Cheng; Jicang Wu; Lei Zhang; Yanyi Li; Zhenlun Wu
Source:
Remote Sensing 2022 v.14 no.5 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; algorithms; data collection; humans;     Show all 4 Subjects
Abstract:
... The integrity of point cloud is the basis for smoothly ensuring subsequent data processing and application. For “Smart City” and “Scan to Building Information Modeling (BIM)”, complete point cloud data is essential. At present, the most commonly used methods for repairing point cloud holes are multi-source data fusion and interpolation. However, these methods either make it difficult to obtain dat ...
DOI:
10.3390/rs14051090

15. LiDAR Odometry by Deep Learning-Based Feature Points with Two-Step Pose Estimation

Author:
Tianyi Liu; Yan Wang; Xiaoji Niu; Le Chang; Tisheng Zhang; Jingnan Liu
Source:
Remote Sensing 2022 v.14 no.12 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; algorithms; data collection; lighting;     Show all 4 Subjects
Abstract:
... An accurate ego-motion estimation solution is vital for autonomous vehicles. LiDAR is widely adopted in self-driving systems to obtain depth information directly and eliminate the influence of changing illumination in the environment. In LiDAR odometry, the lack of descriptions of feature points as well as the failure of the assumption of uniform motion may cause mismatches or dilution of precisio ...
DOI:
10.3390/rs14122764

16. RANSAC-based multi primitive building reconstruction from 3D point clouds

Author:
Zhixin Li; Jie Shan
Source:
ISPRS journal of photogrammetry and remote sensing 2022 v.185 pp. 247-260
ISSN:
0924-2716
Subject:
lidar,   etc   ; data collection; models; photogrammetry;     Show all 4 Subjects
Abstract:
... Building model reconstruction from 3D point clouds has been investigated for several decades with increasing interests. Building models represented by one or more parametric primitives can assure regularity and provide semantic information for the reconstructed buildings. However, there exist challenges in reliably determining building primitives, especially for compound buildings with multiple pr ...
DOI:
10.1016/j.isprsjprs.2021.12.012

17. Use of Sentinel 2 imagery to estimate vegetation height in fragments of Atlantic Forest

Author:
Gabriel Guariglia Perez; Vandoir Bourscheidt; Luciano Elsinor Lopes; Juliana Toshie Takata; Patrícia Alves Ferreira; Danilo Boscolo
Source:
Ecological informatics 2022 v.69 pp. 101680
ISSN:
1574-9541
Subject:
lidar,   etc   ; forests; wet season; Brazil;     Show all 4 Subjects
Abstract:
... Information on vegetation height can be used in a variety of applications, but the high cost to obtain it in large areas using field sampling and the latest remote sensing technologies is still a barrier for low-income countries and organizations. In an attempt to overcome these limitations, we explored the possibility to estimate vegetation height in fragments of Atlantic Forest (São Paulo - Braz ...
DOI:
10.1016/j.ecoinf.2022.101680
CHORUS:
10.1016/j.ecoinf.2022.101680

18. Automatic Generation of Urban Road 3D Models for Pedestrian Studies from LiDAR Data

Author:
David Fernández-Arango; Francisco-Alberto Varela-García; Diego González-Aguilera; Susana Lagüela-López
Source:
Remote Sensing 2022 v.14 no.5 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; data collection; models; scanners;     Show all 4 Subjects
Abstract:
... The point clouds acquired with a mobile LiDAR scanner (MLS) have high density and accuracy, which allows one to identify different elements of the road in them, as can be found in many scientific references, especially in the last decade. This study presents a methodology to characterize the urban space available for walking, by segmenting point clouds from data acquired with MLS and automatically ...
DOI:
10.3390/rs14051102

19. An Investigation of the Ice Cloud Detection Sensitivity of Cloud Radars Using the Raman Lidar at the ARM SGP Site

Author:
Mingcheng Wang; Kelly A. Balmes; Tyler J. Thorsen; Dylan Willick; Qiang Fu
Source:
Remote Sensing 2022 v.14 no.14 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; detection limit; ice; radar;     Show all 4 Subjects
Abstract:
... The ice cloud detection sensitivity of the millimeter cloud radar (MMCR) and the Ka-band Zenith radar (KAZR) is investigated using a collocated Raman lidar (RL) at the Atmospheric Radiation Measurement Program Southern Great Plains site. Only profiles that are transparent to the RL with ice clouds only are considered in this study. The MMCR underestimates the RL ice cloud optical depth (COD) by 20 ...
DOI:
10.3390/rs14143466

20. Reflective Noise Filtering of Large-Scale Point Cloud Using Transformer

Author:
Rui Gao; Mengyu Li; Seung-Jun Yang; Kyungeun Cho
Source:
Remote Sensing 2022 v.14 no.3 pp. -
ISSN:
2072-4292
Subject:
lidar,   etc   ; algorithms; data collection; glass;     Show all 4 Subjects
Abstract:
... Point clouds acquired with LiDAR are widely adopted in various fields, such as three-dimensional (3D) reconstruction, autonomous driving, and robotics. However, the high-density point cloud of large scenes captured with Lidar usually contains a large number of virtual points generated by the specular reflections of reflective materials, such as glass. When applying such large-scale high-density po ...
DOI:
10.3390/rs14030577