Results 51 to 60 of about 1,583 (210)

Assessing the Accuracy of Digital Surface Models Derived from Optical Imagery Acquired with Unmanned Aerial Systems

Drones, 2019
Small unmanned aerial systems (UASs) equipped with an optical camera are a cost-effective strategy for topographic surveys. These low-cost UASs can provide useful information for three-dimensional (3D) reconstruction even if they are equipped with a low ...
Salvatore Manfreda, Petr Dvorak, Jana Mullerova, Sorin Herban, Pietro Vuono, José Juan Arranz Justel, Matthew Perks   +6 more
doaj   +1 more source

HYBRID GEOMETRIC CALIBRATION METHOD FOR MULTI-PLATFORM SPACEBORNE SAR IMAGE WITH SPARSE GCPS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Geometric calibration is able to provide high-accuracy geometric coordinates of spaceborne SAR image through accurate geometric parameters in the Range-Doppler model by ground control points (GCPs).
G. Lv, G. Lv, X. Tang, B. Ai, T. Li, Q. Chen   +5 more
doaj   +1 more source

Real world testing and cost‐effectiveness analysis of subcutaneous EEG (REAL‐ASE): Protocol for a prospective multicentre interventional trial

Epilepsia Open, EarlyView.
Abstract Objective Epilepsy is a common condition associated with significant morbidity, mortality, and costs. Poor documentation of seizures is a major challenge in epilepsy care. Objective seizure counting with mobile devices may mitigate this challenge and improve patient management.
Matthew McWilliam, Pedro F. Viana, Eren Dursun, Joe Davies, Joel S. Winston, Jessica Agren, Harutomo Hasegawa, Jonas Duun‐Henriksen, Mark P. Richardson   +8 more
wiley   +1 more source

Accuracy assessment of RTK/PPK UAV-photogrammetry projects using differential corrections from multiple GNSS fixed base stations

Geocarto International, 2023
Unmanned aerial vehicles (UAVs) equipped with global navigation satellite system-real-time kinematic (GNSS RTK) receivers allow direct georeferencing of the photogrammetric project without using ground control points (GCPs).
Patricio Martínez-Carricondo, Francisco Agüera-Vega, Fernando Carvajal-Ramírez   +2 more
doaj   +1 more source

Accuracy Assessment of a UAV Direct Georeferencing Method and Impact of the Configuration of Ground Control Points

Drones, 2022
Unmanned aerial vehicles (UAVs) can obtain high-resolution topography data flexibly and efficiently at low cost. However, the georeferencing process involves the use of ground control points (GCPs), which limits time and cost effectiveness.
Xiaoyu Liu, Xugang Lian, Wenfu Yang, Fan Wang, Yu Han, Yafei Zhang   +5 more
doaj   +1 more source

Chiral perovskites for next‐generation chiral optoelectronics and spintronics

FlexMat, EarlyView.
Benefiting from structural inversion symmetry breaking and strong spin‐orbit coupling, chiral perovskites possess intriguing chiral optical and spin properties. We overview their advances and core applications in perovskite solar cells, circularly polarized light detectors and spin circularly polarized‐light‐emitting diodes, offering great potential ...
Mengyao Zhang, Rui Xu, Xueyan Hou, Sihan Du, Mengting Xu, Jia Wu, Zhichao Lin, Pei Liu, Qiang Zhuang, Xiaoming Zhao, Yang Yang, Wenda Shi, Wanlin Guo, Jie Kong   +13 more
wiley   +1 more source

Automating Ground Control Point Detection in Drone Imagery: From Computer Vision to Deep Learning

Remote Sensing
Drone-based photogrammetry typically requires the task of georeferencing aerial images by detecting the center of Ground Control Points (GCPs) placed in the field. Since this is a very labor-intensive task, it could benefit greatly from automation.
Gonzalo Muradás Odriozola, Klaas Pauly, Samuel Oswald, Dries Raymaekers   +3 more
doaj   +1 more source

Measurement of surface velocity in open channels using a lightweight remotely piloted aircraft system

Geomatics, Natural Hazards & Risk, 2017
In this paper, a low-cost remotely piloted aircraft system (RPAS) technique is proposed for measurement of the surface velocity in rivers or channels with low surface velocity and small discharge.
M. Bolognesi, G. Farina, S. Alvisi, M. Franchini, A. Pellegrinelli, P. Russo   +5 more
doaj   +1 more source

A Region Growing controlled by Edge Map technique (RGCE) for Automatic Registration of Satellite Images [PDF]

Journal of the ACS Advances in Computer Science, 2019
Image registration is a basic and troublesome assignment where managingremotely sensed satellite images. The registration of different platform images has turnedinto a critical issue with an expanding number of images gathered each day from ...
doaj   +1 more source

Pediatric home‐based central venous access device dressings: Medical liquid adhesive versus standard care to reduce dressing disruption: The STICKY‐kids RCT protocol

Journal of Hospital Medicine, EarlyView.
Abstract Background Central venous access devices (CVADs) are frequently used in Hospital‐At‐Home models to facilitate prolonged intravenous treatment for children. Premature CVAD dressing disruption is common and contributes to device failure. This protocol describes a trial evaluating the adjunctive use of medical liquid adhesive at the dressing–skin
Tricia M. Kleidon, Mari Takashima, Victoria Gibson, Robert S. Ware, R. N. Nicole Marsh, Amanda J Ullman   +5 more
wiley   +1 more source