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Histogram of detection

hist_detection.Rd

Displays the histogram of tree heights of three categories: true detections, omissions, and false detections.

Usage

hist_detection(lr, ld, matched, plot = TRUE)

Arguments

lr

data.frame or matrix. 3D coordinates (X Y Height) of reference positions

ld

data.frame or matrix. 3D coordinates (X Y Height) of detected positions

matched

data.frame. contains pair indices, typically returned by tree_matching

plot

boolean. should the histogram be displayed or not

Value

A list with three numerics: numbers of true detections, omissions and false detections

See also

tree_matching

Examples

# create reference and detected trees
ref_trees <- cbind(c(1, 4, 3, 4, 2), c(1, 1, 2, 3, 4), c(15, 18, 20, 10, 11))
def_trees <- cbind(c(2, 2, 4, 4), c(1, 3, 4, 1), c(16, 19, 9, 15))
#
# tree matching with different buffer size
match1 <- tree_matching(ref_trees, def_trees)
match2 <- tree_matching(ref_trees, def_trees, delta_ground = 2, h_prec = 0)
#
# corresponding number of detections
hist_detection(ref_trees, def_trees, match1)

#> $true_detections
#> [1] 4
#> 
#> $false_detections
#> [1] 0
#> 
#> $omissions
#> [1] 1
#> 
hist_detection(ref_trees, def_trees, match2)

#> $true_detections
#> [1] 3
#> 
#> $false_detections
#> [1] 1
#> 
#> $omissions
#> [1] 2
#>