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Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images
Continuing population growth will result in increasing global demand for food and fiber for the foreseeable future. During the growing season, variability in the height of crops provides important information on plant health, growth, and response to environmental effects. This paper indicates the fe...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308534/ https://www.ncbi.nlm.nih.gov/pubmed/30469545 http://dx.doi.org/10.3390/s18124092 |
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author | Han, Xiongzhe Thomasson, J. Alex Bagnall, G. Cody Pugh, N. Ace Horne, David W. Rooney, William L. Jung, Jinha Chang, Anjin Malambo, Lonesome Popescu, Sorin C. Gates, Ian T. Cope, Dale A. |
author_facet | Han, Xiongzhe Thomasson, J. Alex Bagnall, G. Cody Pugh, N. Ace Horne, David W. Rooney, William L. Jung, Jinha Chang, Anjin Malambo, Lonesome Popescu, Sorin C. Gates, Ian T. Cope, Dale A. |
author_sort | Han, Xiongzhe |
collection | PubMed |
description | Continuing population growth will result in increasing global demand for food and fiber for the foreseeable future. During the growing season, variability in the height of crops provides important information on plant health, growth, and response to environmental effects. This paper indicates the feasibility of using structure from motion (SfM) on images collected from 120 m above ground level (AGL) with a fixed-wing unmanned aerial vehicle (UAV) to estimate sorghum plant height with reasonable accuracy on a relatively large farm field. Correlations between UAV-based estimates and ground truth were strong on all dates (R(2) > 0.80) but are clearly better on some dates than others. Furthermore, a new method for improving UAV-based plant height estimates with multi-level ground control points (GCPs) was found to lower the root mean square error (RMSE) by about 20%. These results indicate that GCP-based height calibration has a potential for future application where accuracy is particularly important. Lastly, the image blur appeared to have a significant impact on the accuracy of plant height estimation. A strong correlation (R(2) = 0.85) was observed between image quality and plant height RMSE and the influence of wind was a challenge in obtaining high-quality plant height data. A strong relationship (R(2) = 0.99) existed between wind speed and image blurriness. |
format | Online Article Text |
id | pubmed-6308534 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-63085342019-01-04 Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images Han, Xiongzhe Thomasson, J. Alex Bagnall, G. Cody Pugh, N. Ace Horne, David W. Rooney, William L. Jung, Jinha Chang, Anjin Malambo, Lonesome Popescu, Sorin C. Gates, Ian T. Cope, Dale A. Sensors (Basel) Article Continuing population growth will result in increasing global demand for food and fiber for the foreseeable future. During the growing season, variability in the height of crops provides important information on plant health, growth, and response to environmental effects. This paper indicates the feasibility of using structure from motion (SfM) on images collected from 120 m above ground level (AGL) with a fixed-wing unmanned aerial vehicle (UAV) to estimate sorghum plant height with reasonable accuracy on a relatively large farm field. Correlations between UAV-based estimates and ground truth were strong on all dates (R(2) > 0.80) but are clearly better on some dates than others. Furthermore, a new method for improving UAV-based plant height estimates with multi-level ground control points (GCPs) was found to lower the root mean square error (RMSE) by about 20%. These results indicate that GCP-based height calibration has a potential for future application where accuracy is particularly important. Lastly, the image blur appeared to have a significant impact on the accuracy of plant height estimation. A strong correlation (R(2) = 0.85) was observed between image quality and plant height RMSE and the influence of wind was a challenge in obtaining high-quality plant height data. A strong relationship (R(2) = 0.99) existed between wind speed and image blurriness. MDPI 2018-11-22 /pmc/articles/PMC6308534/ /pubmed/30469545 http://dx.doi.org/10.3390/s18124092 Text en © 2018 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 Han, Xiongzhe Thomasson, J. Alex Bagnall, G. Cody Pugh, N. Ace Horne, David W. Rooney, William L. Jung, Jinha Chang, Anjin Malambo, Lonesome Popescu, Sorin C. Gates, Ian T. Cope, Dale A. Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images |
title | Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images |
title_full | Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images |
title_fullStr | Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images |
title_full_unstemmed | Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images |
title_short | Measurement and Calibration of Plant-Height from Fixed-Wing UAV Images |
title_sort | measurement and calibration of plant-height from fixed-wing uav images |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308534/ https://www.ncbi.nlm.nih.gov/pubmed/30469545 http://dx.doi.org/10.3390/s18124092 |
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