Results 31 to 40 of about 2,014,996 (306)

Fast and Automatic Reconstruction of Semantically Rich 3D Indoor Maps from Low-quality RGB-D Sequences

Sensors, 2019
Semantically rich indoor models are increasingly used throughout a facility’s life cycle for different applications. With the decreasing price of 3D sensors, it is convenient to acquire point cloud data from consumer-level scanners.
Shengjun Tang, Yunjie Zhang, You Li, Zhilu Yuan, Yankun Wang, Xiang Zhang, Xiaoming Li, Yeting Zhang, Renzhong Guo, Weixi Wang   +9 more
doaj   +1 more source

Learning Adjustable Reduced Downsampling Network for Small Object Detection in Urban Environments

Remote Sensing, 2021
Detecting small objects (e.g., manhole covers, license plates, and roadside milestones) in urban images is a long-standing challenge mainly due to the scale of small object and background clutter.
Huijie Zhang, Li An, Vena W. Chu, Douglas A. Stow, Xiaobai Liu, Qinghua Ding   +5 more
doaj   +1 more source

A Novel Approach to Global Positioning System Accuracy Assessment, Verified on LiDAR Alignment of One Million Kilometers at a Continent Scale, as a Foundation for Autonomous DRIVING Safety Analysis

Sensors, 2021
This paper concerns a new methodology for accuracy assessment of GPS (Global Positioning System) verified experimentally with LiDAR (Light Detection and Ranging) data alignment at continent scale for autonomous driving safety analysis.
Janusz Bedkowski, Hubert Nowak, Blazej Kubiak, Witold Studzinski, Maciej Janeczek, Szymon Karas, Adam Kopaczewski, Przemyslaw Makosiej, Jaroslaw Koszuk, Michal Pec, Krzysztof Miksa   +10 more
doaj   +1 more source

Area extraction and growth monitoring of sugarcane from multi-source remote sensing images under a polarimetric SAR data compensation based on buildings

Geo-spatial Information Science
Aiming at the issue of low accuracy in crop mapping and growth monitoring caused by imprecise calibration of radar time-series data, this paper proposed a Synthetic Aperture Radar (SAR) spatio-temporal error compensation method.
Yong Hong, Tianjin Xie, Lengkun Luo, Mi Wang, Deren Li, Qing Zhang, Ting Xu   +6 more
doaj   +1 more source

Multidimensional mobile mapping and integrated approach for the digitalisation of underground transport infrastructure

Acta Polytechnica, 2023
The tunnel industry has started focusing on the maintenance and management challenges of an existing infrastructure. It is an urgent matter in industrialised countries, where the stakeholders’ attention is increasing at a fast pace considering the ...
Federico Foria, Mario Calicchio, Laura Moretti, Giuseppe Loprencipe   +3 more
doaj   +1 more source

An approach to mobile collaborative mapping [PDF]

Proceedings of the 2008 ACM symposium on Applied computing, 2008
With the advent of Web 2.0, users now expect to be able to customise, edit and share information from any online device. These capabilities are unavailable in many geographic information applications and where it is, it is far too difficult to use. Satellite navigation devices and software are also not flexible enough in this regard.
Soon, Chien, Roe, Paul, Tjondronegoro, Dian   +2 more
openaire   +3 more sources

Mobile Mapping Technologies [PDF]

, 2021
AbstractThis chapter introduces the historic development as well as the latest progress of mobile mapping systems. First, mobile mapping technologies, including the introduction of positioning and mapping sensors, and how they can be integrated together, are briefly reviewed.
Kai Wei Chiang, Guang-Je Tsai, Jhih Cing Zeng   +2 more
openaire   +1 more source

Strategy for Determining the Stochastic Distance Characteristics of the 2D Laser Scanner Z + F Profiler 9012A with Special Focus on the Close Range

Sensors, 2018
Kinematic laser scanning with moving platforms has been used for the acquisition of 3D point clouds of our environment for many years. A main application of these mobile systems is the acquisition of the infrastructure, e.g., the road surface and ...
Erik Heinz, Markus Mettenleiter, Heiner Kuhlmann, Christoph Holst   +3 more
doaj   +1 more source

Microdrone-Based Indoor Mapping with Graph SLAM

Drones, 2022
Unmanned aerial vehicles offer a safe and fast approach to the production of three-dimensional spatial data on the surrounding space. In this article, we present a low-cost SLAM-based drone for creating exploration maps of building interiors.
Samer Karam, Francesco Nex, Bhanu Teja Chidura, Norman Kerle   +3 more
doaj   +1 more source

Extrinsic Calibration of 2D Laser Rangefinders Using an Existing Cuboid-Shaped Corridor as the Reference

Sensors, 2018
Laser rangefinders (LRFs) are widely used in autonomous systems for indoor positioning and mobile mapping through the simultaneous localization and mapping (SLAM) approach. The extrinsic parameters of multiple LRFs need to be determined, and they are one
Deyu Yin, Jingbin Liu, Teng Wu, Keke Liu, Juha Hyyppä, Ruizhi Chen   +5 more
doaj   +1 more source