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A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images

Pylons play an important role in the safe operation of power transmission grids. Directly reconstructing pylons from UAV images is still a great challenge due to problems of weak texture, hollow-carved structure, and self-occlusion. This paper presents an automatic model-driven method for pylon reco...

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Detalles Bibliográficos
Autores principales: Huang, Wei, Jiang, San, Jiang, Wanshou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7038677/
https://www.ncbi.nlm.nih.gov/pubmed/32033044
http://dx.doi.org/10.3390/s20030824
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author Huang, Wei
Jiang, San
Jiang, Wanshou
author_facet Huang, Wei
Jiang, San
Jiang, Wanshou
author_sort Huang, Wei
collection PubMed
description Pylons play an important role in the safe operation of power transmission grids. Directly reconstructing pylons from UAV images is still a great challenge due to problems of weak texture, hollow-carved structure, and self-occlusion. This paper presents an automatic model-driven method for pylon reconstruction from oblique UAV images. The pylons are reconstructed with the aid of the 3D parametric model library, which is represented by connected key points based on symmetry and coplanarity. First, an efficient pylon detection method is applied to detect the pylons in the proposed region, which are obtained by clustering the line segment intersection points. Second, the pylon model library is designed to assist in pylon reconstruction. In the predefined pylon model library, a pylon is divided into two parts: pylon body and pylon head. Before pylon reconstruction, the pylon type is identified by the inner distance shape context (IDSC) algorithm, which matches the shape contours of pylon extracted from UAV images and the projected pylon model. With the a priori shape and coplanar constraint, the line segments on pylon body are matched and the pylon body is modeled by fitting four principle legs and four side planes. Then a Markov Chain Monte Carlo (MCMC) sampler is used to estimate the parameters of the pylon head by computing the maximum probability between the projected model and the extracted line segments in images. Experimental results on several UAV image datasets show that the proposed method is a feasible way of automatically reconstructing the pylon.
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spelling pubmed-70386772020-03-09 A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images Huang, Wei Jiang, San Jiang, Wanshou Sensors (Basel) Article Pylons play an important role in the safe operation of power transmission grids. Directly reconstructing pylons from UAV images is still a great challenge due to problems of weak texture, hollow-carved structure, and self-occlusion. This paper presents an automatic model-driven method for pylon reconstruction from oblique UAV images. The pylons are reconstructed with the aid of the 3D parametric model library, which is represented by connected key points based on symmetry and coplanarity. First, an efficient pylon detection method is applied to detect the pylons in the proposed region, which are obtained by clustering the line segment intersection points. Second, the pylon model library is designed to assist in pylon reconstruction. In the predefined pylon model library, a pylon is divided into two parts: pylon body and pylon head. Before pylon reconstruction, the pylon type is identified by the inner distance shape context (IDSC) algorithm, which matches the shape contours of pylon extracted from UAV images and the projected pylon model. With the a priori shape and coplanar constraint, the line segments on pylon body are matched and the pylon body is modeled by fitting four principle legs and four side planes. Then a Markov Chain Monte Carlo (MCMC) sampler is used to estimate the parameters of the pylon head by computing the maximum probability between the projected model and the extracted line segments in images. Experimental results on several UAV image datasets show that the proposed method is a feasible way of automatically reconstructing the pylon. MDPI 2020-02-04 /pmc/articles/PMC7038677/ /pubmed/32033044 http://dx.doi.org/10.3390/s20030824 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Huang, Wei
Jiang, San
Jiang, Wanshou
A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images
title A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images
title_full A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images
title_fullStr A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images
title_full_unstemmed A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images
title_short A Model-Driven Method for Pylon Reconstruction from Oblique UAV Images
title_sort model-driven method for pylon reconstruction from oblique uav images
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7038677/
https://www.ncbi.nlm.nih.gov/pubmed/32033044
http://dx.doi.org/10.3390/s20030824
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