Results 31 to 40 of about 513 (126)

Developing innovative and cost-effective UAS-PPK module for generating high-accuracy digital surface model

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2023
Traditional indirect georeferencing requires time-consuming and labor-intensive field surveys to obtain ground control points (GCPs), making it challenging to apply in high-risk areas with limited accessibility.
Cheng-Hao Lu   +3 more
doaj   +1 more source

Object Recognition of a GCP Design in UAS Imagery Using Deep Learning and Image Processing—Proof of Concept Study

open access: yesDrones, 2023
Image-based unmanned aircraft systems (UASs) are used in a variety of geodetic applications. Precise 3D terrain surface mapping requires ground control points (GCPs) for scaling and (indirect) georeferencing.
Denise Becker, Jörg Klonowski
doaj   +1 more source

Analiza vplivov na kakovost izdelkov UAV (= Analysis of the impacts on the quality of UAV photogrammetric products) [PDF]

open access: yesGeodetski Vestnik, 2020
Unmanned aerial vehicles, equipped with various sensors and devices, are increasingly used to acquire geospatial data in geodesy, geoinformatics, and environmental studies.
Mojca Kosmatin Fras   +3 more
doaj   +1 more source

THE INFLUENCE OF GROUND CONTROL POINTS CONFIGURATION AND CAMERA CALIBRATION FOR DTM AND ORTHOMOSAIC GENERATION USING IMAGERY OBTAINED FROM A LOW-COST UAV [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Technological improvement of Unmanned Aerial Vehicles (UAVs) and computer vision algorithms, such as Structured-from-Motion (SfM) and Multi-view Stereo (MVS) have provided the possibility for high-resolution mapping and high-density point cloud ...
M. V. Y. Garcia, H. C. Oliveira
doaj   +1 more source

MULTI-SCALE MATCHING FOR THE AUTOMATIC LOCATION OF CONTROL POINTS IN LARGE SCALE AERIAL IMAGES USING TERRESTRIAL SCENES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
A technique to automatically locate Ground Control Points (GCPs) in large aerial images is presented considering the availability of low accuracy direct georeferencing data. The approach is based on image chips of GCPs extracted from vertical terrestrial
A. Berveglieri, A. M. G. Tommaselli
doaj   +1 more source

ANALYSIS OF MOBILE LASER SCANNING DATA AND MULTI-VIEW IMAGE RECONSTRUCTION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
The combination of laser scanning (LS, active, direct 3D measurement of the object surface) and photogrammetry (high geometric and radiometric resolution) is widely applied for object reconstruction (e.g.
C. Briese   +10 more
doaj   +1 more source

ANALYZING OF THE TERRESTRIAL LASER SCANNER GEOREFERENCING USING GNSS

open access: yesMağallaẗ Al-kūfaẗ Al-handasiyyaẗ, 2018
Recent years have witnessed emerging the cutting-edge method for point cloud creation using terrestrial laser scanner (TLS). The TLS manufacturers declare accuracies of their instruments up to the millimeter level.
Hasan A. Jaafar
doaj   +1 more source

AEROTRIANGULATION SUPPORTED BY CAMERA STATION POSITION DETERMINED VIA PHYSICAL INTEGRATION OF LIDAR AND SLR DIGITAL CAMERA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Nowadays lidar and photogrammetric surveys have been used together in many mapping procedures due to their complementary characteristics. Lidar survey is capable to promptly acquire reliable elevation information that is sometimes difficult via ...
E. Mitishita   +3 more
doaj   +1 more source

Development and Evaluation of a UAV-Photogrammetry System for Precise 3D Environmental Modeling

open access: yesSensors, 2015
The specific requirements of UAV-photogrammetry necessitate particular solutions for system development, which have mostly been ignored or not assessed adequately in recent studies.
Mozhdeh Shahbazi   +3 more
doaj   +1 more source

A Comparative Analysis of Unmanned Aircraft Systems in Low Altitude Photogrammetric Surveys

open access: yesRemote Sensing, 2022
Comparing photogrammetric performances of four user-grade unmanned aircraft systems (UAS) is the main aim of this paper. This study investigates what is the more suitable UAS for specific applications considering the required scale factor, such as for ...
Francesco Mugnai, Grazia Tucci
doaj   +1 more source

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