Mr. Nanxiang Zhao Profile

Nanxiang Zhao

at Hefei Electronic Engineering Institute

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Publications (13)

Proceedings Article | 30 April 2024 Paper

Point cloud power line extraction based on improved DBSCAN algorithm in multiweather scenarios

Zhenglei Dou, Yihua Hu, Nanxiang Zhao, Luda Zhao

Proceedings Volume 13157, 1315718 (2024) https://doi.org/10.1117/12.3018773

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With the maturity of LiDAR technology, LiDAR point cloud segmentation has been widely applied in automatic inspection of power lines. However, in weather scenarios such as rain, snow, and dust, lidar data noise and dynamically changing power line data can be generated, resulting in a decrease in power line extraction efficiency. The commonly used airborne LiDAR can only work in sunny weather conditions, and in order to improve the accuracy of point cloud power line extraction, the data collected on board needs to be preprocessed to obtain complete scene point cloud data, which cannot meet the requirement of automatic inspection of power lines.In order to solve the problems of real-time monitoring of airborne LiDAR data and low accuracy in extracting power line point clouds under different weather scenarios, this paper proposes a point cloud power line extraction method based on the improved DBSCAN algorithm, starting from the data features of fixed LiDAR real-time scanning point clouds. Firstly, the cloth filtering method is used to filter out ground points and obtain non ground point clouds; On this basis, based on the spatial relative density characteristics of non-ground point clouds, target data such as traverse points and tower points are roughly extracted from non-ground points; Then, the distribution characteristics of the elevation point cloud are used to identify the tower, and the maximum width of the tower is used to segment the power lines within the range of the tower. Then, based on the data characteristics of the point cloud, the density clustering parameters are continuously modified to further improve the accuracy of power line point cloud segmentation. In order to verify the effectiveness of the algorithm, point cloud power line point cloud segmentation experiments were conducted in different meteorological environments, and compared with European clustering segmentation and regional growth algorithms. The experimental results show that the improved DBSCAN algorithm proposed in this paper has the best segmentation performance for power line point clouds in complex weather scenarios, which is basically consistent with sunny conditions and can meet the actual power inspection needs.

Proceedings Article | 4 April 2023 Paper

Acquisition of moving target structural characteristics via photon detection

A-Hui Hou, Yi-Hua Hu, Nan-Xiang Zhao, Jia-Jie Fang

Proceedings Volume 12617, 126172Q (2023) https://doi.org/10.1117/12.2665108

KEYWORDS: Target detection, LIDAR

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Proceedings Article | 19 December 2022 Poster + Paper

Laser echo decoherence characteristics of rough plane in heterodyne detection with truncated GSM beam

Xiao Dong, Yihua Hu, Nanxiang Zhao, Shilong Xu

Proceedings Volume 12321, 1232118 (2022) https://doi.org/10.1117/12.2643995

KEYWORDS: Laser scattering, Heterodyning, Atmospheric turbulence, LIDAR, Target detection, Scattering, Laser sources, Transceivers

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Proceedings Article | 27 March 2022 Paper

Design of transmitter parameters for multi-beam staring photon detection

Ahui Hou, Yi-Hua Hu, Nan-Xiang Zhao, Jia-Jie Fang

Proceedings Volume 12169, 121692J (2022) https://doi.org/10.1117/12.2622906

KEYWORDS: Photodetectors, Target detection, Pulsed laser operation, LIDAR, Transmitters, Laser range finders, Imaging systems, Photonics systems, Signal detection

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Proceedings Article | 23 October 2018 Paper

Numerical analysis of linewidth demands in heterodyne lidar

Xiao Dong, Yihua Hu, Nanxiang Zhao, Xinying Zhao, Shilong Xu

Proceedings Volume 10821, 1082113 (2018) https://doi.org/10.1117/12.2326907

KEYWORDS: Signal to noise ratio, Heterodyning, LIDAR, Signal detection, Polarization, Fiber lasers, Pulsed laser operation, Digital signal processing, Monte Carlo methods, Sensors

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Proceedings Article | 19 October 2016 Paper

Research on effect of reconstructed image quality in laser reflective tomography imaging

Liang Shi, Yi-hua Hu, Nan-xiang Zhao, Lei Yu

Proceedings Volume 10155, 101551P (2016) https://doi.org/10.1117/12.2246633

KEYWORDS: Reconstruction algorithms, Reflectivity, Tomography, Image filtering, Image quality, Laser imaging, Optical filters, Image restoration

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Proceedings Article | 15 October 2015 Paper

Study on feasibility of laser reflective tomography with satellite-accompany

Yu Gu, Yi-hua Hu, Shi-qi Hao, You-lin Gu, Nan-xiang Zhao, Yang-yang Wang

Proceedings Volume 9674, 96742T (2015) https://doi.org/10.1117/12.2202763

KEYWORDS: Satellites, Tomography, Reflectivity, Satellite imaging, Imaging systems, Ultrasound reflection tomography, Target detection, Laser applications, LIDAR, Pulsed laser operation

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Proceedings Article | 8 October 2015 Paper

Analysis of the super-sensitivity of N00N and M-and-M' states under atmospheric influence

Shi-long Xu, Yi-hua Hu, Nan-xiang Zhao, Le Li, Xin-ying Zhao

Proceedings Volume 9677, 96772J (2015) https://doi.org/10.1117/12.2202932

KEYWORDS: Photons, Signal attenuation, Transmittance, Interferometers, Sensors, Entangled states, Atmospheric sensing, Atmospheric modeling, Metrology, Electronics engineering

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Proceedings Article | 8 September 2011 Paper

Analysis and simulation of the infrared characteristics of the aerial target

Sen Ma, Xiao-xia Li, Nan Zhao

Proceedings Volume 8193, 819343 (2011) https://doi.org/10.1117/12.901000

KEYWORDS: Infrared radiation, Infrared imaging, 3D modeling, Aerodynamics, Thermography, OpenGL, Finite element methods, Convection, Sun, Missiles

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Proceedings Article | 20 August 2011 Paper

The research of the CO2 differential absorption coherent lidar technology

Nanxiang Zhao, Qun Zhan, Yihua Hu

Proceedings Volume 8192, 819222 (2011) https://doi.org/10.1117/12.900313

KEYWORDS: Carbon dioxide, Absorption, LIDAR, Carbon dioxide lasers, Sensors, Polarization, Signal detection, Control systems, Oscillators, Signal processing

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Proceedings Article | 20 August 2011 Paper

Product surface roughness measurement based on the fractal feature of the laser speckle image

Qun Zhan, Nanxiang Zhao

Proceedings Volume 8192, 819221 (2011) https://doi.org/10.1117/12.900311

KEYWORDS: Fractal analysis, Speckle, Surface roughness, Feature extraction, Principal component analysis, Laser scattering, Laser applications, Light scattering, Laser processing, Image processing

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Proceedings Article | 13 October 2010 Paper

Research on aircraft trailing vortex detection based on laser's multiplex information echo

Nan-xiang Zhao, Yong-hua Wu, Yi-hua Hu, Wu-hu Lei

Proceedings Volume 7656, 76564J (2010) https://doi.org/10.1117/12.865574

KEYWORDS: Light scattering, Doppler effect, Atmospheric particles, Photodetectors, Molecules, Aerosols, Information security, Laser applications, Optical simulations, Laser scanners

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Proceedings Article | 29 August 2009 Paper

Target detection method based on the single laser return waveform

Nanxiang Zhao, Yihua Hu, Min He

Proceedings Volume 7382, 73822A (2009) https://doi.org/10.1117/12.836263

KEYWORDS: Laser imaging, Target detection, Pulsed laser operation, Imaging systems, Laser systems engineering, Spectral resolution, Data processing, Reflectivity, Sensors, Laser applications

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Showing 5 of 13 publications

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