View source: R/metrics_Terryn_2020.R
vertical_bin_radii_qsm | R Documentation |
Calculates the radii of the three vertical bins fitted to the TreeQSM cylinders.
vertical_bin_radii_qsm(treedata, cylinder)
treedata |
Treedata field of a TreeQSM that is returned by
|
cylinder |
Cylinder field of a TreeQSM that is returned by
|
These radii are the radii of the cylinders whose axis are vertical and goes through the bin centre point, and which contains approximately 90% of the volume of the branch cylinders in that bin. The tree is divided into three vertical bins, and the centre point of each bin is defined as the average of mean points of stem cylinders in the bin. If the bin does not contain stem cylinders the centre of the previous bin is used (Akerblom et al., 2017 & Terryn et al., 2020).
The radii of the three vertical bins.
Akerblom, M., Raumonen, P., Makipaa, R., & Kaasalainen, M. (2017). Automatic tree species recognition with quantitative structure models. Remote Sensing of Environment, 191, 1-12.
Terryn, L., Calders, K., Disney, M., Origo, N., Malhi, Y., Newnham, G., ... & Verbeeck, H. (2020). Tree species classification using structural features derived from terrestrial laser scanning. ISPRS Journal of Photogrammetry and Remote Sensing, 168, 170-181.
## Not run:
# Read tree qsm and calculate the vertical bin radii
qsm <- read_tree_qsm(QSM_path = "path/to/qsm.mat")
radii <- vertical_bin_radii_qsm(
treedata = qsm$treedata,
cylinder = qsm$cylinder
)
## End(Not run)
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