pliman (version 3.1.0)

mosaic_segment_pick: Segments a mosaic interactively

Description

The function segments a mosaic using an interative process where the user picks samples from background (eg., soil) and foreground (eg., plants).

Usage

mosaic_segment_pick(
  mosaic,
  basemap = NULL,
  g = 2,
  r = 3,
  b = 1,
  max_pixels = 2e+06,
  downsample = NULL,
  quantiles = c(0, 1),
  return = c("mosaic", "mask")
)

Value

An SpatRaster object with the segmented mosaic (if return = 'mosaic') or a mask (if return = 'mask').

Arguments

mosaic

A mosaic of class SpatRaster, generally imported with mosaic_input().

basemap

An optional mapview object.

r, g, b

The layer for the Red, Green and Blue band, respectively. Defaults to 1, 2, and 3.

max_pixels

Maximum number of pixels to render in the map or plot (default: 500000).

downsample

Downsampling factor to reduce the number of pixels (default: NULL). In this case, if the number of pixels in the image (width x height) is greater than max_pixels a downsampling factor will be automatically chosen so that the number of plotted pixels approximates the max_pixels.

quantiles

the upper and lower quantiles used for color stretching.

return

The output of the function. Either 'mosaic' (the segmented mosaic), or 'mask' (the binary mask).

Examples

if (interactive() && requireNamespace("EBImage")) {
 mosaic <- mosaic_input(system.file("ex/elev.tif", package="terra"))
 seg <- mosaic_segment_pick(mosaic)
 mosaic_plot(seg)
}