Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud
This study explores the use of structure from motion (SfM), a computer vision technique, to model vine canopy structure at a study vineyard in the Texas Hill Country. Using an unmanned aerial vehicle (UAV) and a digital camera, 201 aerial images (nadir and oblique) were collected and used to create...
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2013-05-01
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Online Access: | http://www.mdpi.com/2072-4292/5/5/2164 |
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doaj-74a4b9a6eaa94bc5afa6632839aaddbc2020-11-24T21:06:34ZengMDPI AGRemote Sensing2072-42922013-05-01552164218310.3390/rs5052164Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point CloudJennifer L. R. JensenAdam J. MathewsThis study explores the use of structure from motion (SfM), a computer vision technique, to model vine canopy structure at a study vineyard in the Texas Hill Country. Using an unmanned aerial vehicle (UAV) and a digital camera, 201 aerial images (nadir and oblique) were collected and used to create a SfM point cloud. All points were classified as ground or non-ground points. Non-ground points, presumably representing vegetation and other above ground objects, were used to create visualizations of the study vineyard blocks. Further, the relationship between non-ground points in close proximity to 67 sample vines and collected leaf area index (LAI) measurements for those same vines was also explored. Points near sampled vines were extracted from which several metrics were calculated and input into a stepwise regression model to attempt to predict LAI. This analysis resulted in a moderate R2 value of 0.567, accounting for 57 percent of the variation of LAISQRT using six predictor variables. These results provide further justification for SfM datasets to provide three-dimensional datasets necessary for vegetation structure visualization and biophysical modeling over areas of smaller extent. Additionally, SfM datasets can provide an increased temporal resolution compared to traditional three-dimensional datasets like those captured by light detection and ranging (lidar).http://www.mdpi.com/2072-4292/5/5/2164structure from motionSfMbundle adjustmentpoint cloudLAIvegetationUAVvineyard |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jennifer L. R. Jensen Adam J. Mathews |
spellingShingle |
Jennifer L. R. Jensen Adam J. Mathews Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud Remote Sensing structure from motion SfM bundle adjustment point cloud LAI vegetation UAV vineyard |
author_facet |
Jennifer L. R. Jensen Adam J. Mathews |
author_sort |
Jennifer L. R. Jensen |
title |
Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud |
title_short |
Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud |
title_full |
Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud |
title_fullStr |
Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud |
title_full_unstemmed |
Visualizing and Quantifying Vineyard Canopy LAI Using an Unmanned Aerial Vehicle (UAV) Collected High Density Structure from Motion Point Cloud |
title_sort |
visualizing and quantifying vineyard canopy lai using an unmanned aerial vehicle (uav) collected high density structure from motion point cloud |
publisher |
MDPI AG |
series |
Remote Sensing |
issn |
2072-4292 |
publishDate |
2013-05-01 |
description |
This study explores the use of structure from motion (SfM), a computer vision technique, to model vine canopy structure at a study vineyard in the Texas Hill Country. Using an unmanned aerial vehicle (UAV) and a digital camera, 201 aerial images (nadir and oblique) were collected and used to create a SfM point cloud. All points were classified as ground or non-ground points. Non-ground points, presumably representing vegetation and other above ground objects, were used to create visualizations of the study vineyard blocks. Further, the relationship between non-ground points in close proximity to 67 sample vines and collected leaf area index (LAI) measurements for those same vines was also explored. Points near sampled vines were extracted from which several metrics were calculated and input into a stepwise regression model to attempt to predict LAI. This analysis resulted in a moderate R2 value of 0.567, accounting for 57 percent of the variation of LAISQRT using six predictor variables. These results provide further justification for SfM datasets to provide three-dimensional datasets necessary for vegetation structure visualization and biophysical modeling over areas of smaller extent. Additionally, SfM datasets can provide an increased temporal resolution compared to traditional three-dimensional datasets like those captured by light detection and ranging (lidar). |
topic |
structure from motion SfM bundle adjustment point cloud LAI vegetation UAV vineyard |
url |
http://www.mdpi.com/2072-4292/5/5/2164 |
work_keys_str_mv |
AT jenniferlrjensen visualizingandquantifyingvineyardcanopylaiusinganunmannedaerialvehicleuavcollectedhighdensitystructurefrommotionpointcloud AT adamjmathews visualizingandquantifyingvineyardcanopylaiusinganunmannedaerialvehicleuavcollectedhighdensitystructurefrommotionpointcloud |
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