Segments a mosaic interactively — mosaic_segment

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")
)

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).

Value

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

Examples

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