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Unsupervised Bayesian learning for rice panicle segmentation with UAV images

BACKGROUND: In this paper, an unsupervised Bayesian learning method is proposed to perform rice panicle segmentation with optical images taken by unmanned aerial vehicles (UAV) over paddy fields. Unlike existing supervised learning methods that require a large amount of labeled training data, the un...

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Autores principales: Hayat, Md Abul, Wu, Jingxian, Cao, Yingli
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7035759/
https://www.ncbi.nlm.nih.gov/pubmed/32123536
http://dx.doi.org/10.1186/s13007-020-00567-8
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author Hayat, Md Abul
Wu, Jingxian
Cao, Yingli
author_facet Hayat, Md Abul
Wu, Jingxian
Cao, Yingli
author_sort Hayat, Md Abul
collection PubMed
description BACKGROUND: In this paper, an unsupervised Bayesian learning method is proposed to perform rice panicle segmentation with optical images taken by unmanned aerial vehicles (UAV) over paddy fields. Unlike existing supervised learning methods that require a large amount of labeled training data, the unsupervised learning approach detects panicle pixels in UAV images by analyzing statistical properties of pixels in an image without a training phase. Under the Bayesian framework, the distributions of pixel intensities are assumed to follow a multivariate Gaussian mixture model (GMM), with different components in the GMM corresponding to different categories, such as panicle, leaves, or background. The prevalence of each category is characterized by the weights associated with each component in the GMM. The model parameters are iteratively learned by using the Markov chain Monte Carlo (MCMC) method with Gibbs sampling, without the need of labeled training data. RESULTS: Applying the unsupervised Bayesian learning algorithm on diverse UAV images achieves an average recall, precision and F(1) score of 96.49%, 72.31%, and 82.10%, respectively. These numbers outperform existing supervised learning approaches. CONCLUSIONS: Experimental results demonstrate that the proposed method can accurately identify panicle pixels in UAV images taken under diverse conditions.
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spelling pubmed-70357592020-03-02 Unsupervised Bayesian learning for rice panicle segmentation with UAV images Hayat, Md Abul Wu, Jingxian Cao, Yingli Plant Methods Research BACKGROUND: In this paper, an unsupervised Bayesian learning method is proposed to perform rice panicle segmentation with optical images taken by unmanned aerial vehicles (UAV) over paddy fields. Unlike existing supervised learning methods that require a large amount of labeled training data, the unsupervised learning approach detects panicle pixels in UAV images by analyzing statistical properties of pixels in an image without a training phase. Under the Bayesian framework, the distributions of pixel intensities are assumed to follow a multivariate Gaussian mixture model (GMM), with different components in the GMM corresponding to different categories, such as panicle, leaves, or background. The prevalence of each category is characterized by the weights associated with each component in the GMM. The model parameters are iteratively learned by using the Markov chain Monte Carlo (MCMC) method with Gibbs sampling, without the need of labeled training data. RESULTS: Applying the unsupervised Bayesian learning algorithm on diverse UAV images achieves an average recall, precision and F(1) score of 96.49%, 72.31%, and 82.10%, respectively. These numbers outperform existing supervised learning approaches. CONCLUSIONS: Experimental results demonstrate that the proposed method can accurately identify panicle pixels in UAV images taken under diverse conditions. BioMed Central 2020-02-22 /pmc/articles/PMC7035759/ /pubmed/32123536 http://dx.doi.org/10.1186/s13007-020-00567-8 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Hayat, Md Abul
Wu, Jingxian
Cao, Yingli
Unsupervised Bayesian learning for rice panicle segmentation with UAV images
title Unsupervised Bayesian learning for rice panicle segmentation with UAV images
title_full Unsupervised Bayesian learning for rice panicle segmentation with UAV images
title_fullStr Unsupervised Bayesian learning for rice panicle segmentation with UAV images
title_full_unstemmed Unsupervised Bayesian learning for rice panicle segmentation with UAV images
title_short Unsupervised Bayesian learning for rice panicle segmentation with UAV images
title_sort unsupervised bayesian learning for rice panicle segmentation with uav images
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7035759/
https://www.ncbi.nlm.nih.gov/pubmed/32123536
http://dx.doi.org/10.1186/s13007-020-00567-8
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