Results 21 to 30 of about 39,346 (163)

TOPOLOGICAL 3D MODELING USING INDOOR MOBILE LIDAR DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
We focus on a region-based point clustering to extract a polygon from a massive point cloud. In the region-based clustering, RANSAC is a suitable approach for estimating surfaces. However, local workspace selection is required to improve a performance in
M. Nakagawa, T. Yamamoto, S. Tanaka, M. Shiozaki, T. Ohhashi   +4 more
doaj   +1 more source

Point Cloud Data Processing Optimization in Spectral and Spatial Dimensions Based on Multispectral Lidar for Urban Single-Wood Extraction

ISPRS International Journal of Geo-Information, 2023
Lidar can effectively obtain three-dimensional information on ground objects. In recent years, lidar has developed rapidly from single-wavelength to multispectral hyperspectral imaging.
Shuo Shi, Xingtao Tang, Bowen Chen, Biwu Chen, Qian Xu, Sifu Bi, Wei Gong   +6 more
doaj   +1 more source

SS-IPLE: Semantic Segmentation of Electric Power Corridor Scene and Individual Power Line Extraction From UAV-Based Lidar Point Cloud

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Key objects’ semantic segmentation and power line extraction from the electric power corridor point cloud are critical steps in power line inspection.
Xiuning Liu, Feng Shuang, Yong Li, Liqiang Zhang, Xingwen Huang, Jianchuang Qin   +5 more
doaj   +1 more source

Secondary Extraction Algorithm for Scattered Point Cloud Surface Boundary [PDF]

Jisuanji gongcheng, 2017
To overcome the defects of large amounts of calculation and long duration time consuming and calculation amount of current point cloud surface boundary extraction algorithms,a point cloud surface secondary boundary extraction algorithm is put forward ...
TONG Lijing,ZHENG Junchao
doaj   +1 more source

AUTOMATIC EXTRACTION OF POWER LINES FROM UAV LIDAR POINT CLOUDS USING A NOVEL SPATIAL FEATURE [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
UAV LiDAR systems have unique advantage in acquiring 3D geo-information of the targets and the expenses are very reasonable; therefore, they are capable of security inspection of high-voltage power lines.
M. Zhou, K. Y. Li, K. Y. Li, J. H. Wang, C. R. Li, G. E. Teng, L. Ma, H. H. Wu, W. Li, H. J. Zhang, J. Y. Chen, L. S. Chen, L. S. Chen   +12 more
doaj   +1 more source

Point Cloud Classification Algorithm Based on the Fusion of the Local Binary Pattern Features and Structural Features of Voxels

Remote Sensing, 2021
Point cloud classification is a key technology for point cloud applications and point cloud feature extraction is a key step towards achieving point cloud classification.
Yong Li, Yinzheng Luo, Xia Gu, Dong Chen, Fang Gao, Feng Shuang   +5 more
doaj   +1 more source

Interactive Trunk Extraction from Forest Point Cloud [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
For forest management or monitoring, it is required to constantly measure several parameters of each tree, such as height, diameter at breast height, and trunk volume.
T. Mizoguchi, Y. Kobayashi
doaj   +1 more source

A microhardness indentation point cloud segmentation method based on voxel cloud connectivity segmentation

Measurement: Sensors, 2021
In order to accurately extract the effective area of microhardness indentation obtained by laser scanning confocal microscope, the indentation point cloud segmentation method is studied based on over-segmentation using voxel cloud connectivity ...
Shi Wei, Shi Chengyao, Chen Shilin, Zhang Kailin   +3 more
doaj   +1 more source

Use of Cloud Point Extraction with Derivatizing Reagent for the Extraction and Determination of Isoniazid [PDF]

Journal of Chromatographic Science, 2011
A simple and sensitive cloud point extraction high-performance liquid chromatography method is proposed for the determination of isoniazid in blood. The procedure is based on the product of the reaction of isoniazid with benzaldehyde. It can be validated that there is a linear relationship between the signal of isonicotinyl hydrazone and the ...
Wei-jun, Zhao, Wei, Liu, Jian-bo, Chen, Zhi-ming, Zhou, Ming-min, Yang   +4 more
openaire   +2 more sources

Cloud Point Extraction in the Determination of Drugs in Biological Matrices [PDF]

Journal of Chromatographic Science, 2019
AbstractCloud point extraction (CPE) is a simple, safe and environment-friendly technique used in the preparation of various samples. It was primarily developed for the assessment of environmental samples, especially analyzed for metals. Recently, this technique has been used in the extraction and determination of various chemical compounds (e.g ...
Piotr Wroczyński, Grzegorz Kojro
openaire   +2 more sources