Three colours rather than one: what was found, what was missed, and what was invented. A Dice of 0.85 says nothing about which of the three is costing you, and for most clinical questions they are not interchangeable - a missed lesion and a false alarm are different kinds of wrong.
overlay_agreement(
image,
prediction,
truth,
alpha = drawing_style()\$overlay_alpha,
colours = drawing_style()\$agreement_colours
)
image
|
A height x width x channels array.
|
prediction, truth
|
Class indices, counted from 1. |
alpha
|
How strongly to tint. |
colours
|
Named colours for hit, missed and false_alarm.
|
A height x width x 3 array of 0-255 integers.
library("rplatypus")
image <- array(runif(8 * 8 * 3, 0.2, 0.6), dim = c(8, 8, 3))
truth <- matrix(1L, 8, 8); truth[2:4, 2:4] <- 2L
predicted <- matrix(1L, 8, 8); predicted[3:5, 2:4] <- 2L
shown <- overlay_agreement(image, prediction = predicted, truth = truth)
dim(shown)[1] 8 8 3# Three colours, not one: a missed lesion and a false alarm cost different things,
# and a single overlap score hides which one you have.