shedding_ratio_qsm: Shedding ratio TreeQSM

In lmterryn/ITSMe: Individual Tree Structural Metrics

Shedding ratio TreeQSM

Description

Calculates the shedding ratio from a TreeQSM.

Usage

shedding_ratio_qsm(branch, cylinder, treedata)

Arguments

branch	Branch field of a TreeQSM that is returned by read_tree_qsm.
cylinder	Cylinder field of a TreeQSM that is returned by read_tree_qsm.
treedata	Treedata field of a TreeQSM that is returned by read_tree_qsm.

Details

The shedding ratio is defined as "The number of stem branches without children divided by the number of all branches in the bottom third" (Akerblom et al., 2017 & Terryn et al., 2020).

Value

The shedding ratio.

References

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.

Examples

## Not run: 
# Read tree qsm and calculate the shedding ratio
qsm <- read_tree_qsm(QSM_path = "path/to/qsm.mat")
sr <- shedding_ratio_qsm(
  branch = qsm$branch, cylinder = qsm$cylinder,
  treedata = qsm$treedata
)

## End(Not run)

lmterryn/ITSMe documentation built on Feb. 4, 2025, 2:21 a.m.