Mosaic to RGB — mosaic_to

Convert an SpatRaster to a three-band RGB image of class Image.

Usage

mosaic_to_rgb(mosaic, r = 3, g = 2, b = 1, coef = 0, plot = TRUE)

Arguments

mosaic: A mosaic of class SpatRaster, generally imported with mosaic_input().
r, g, b: The red, green, blue bands.
coef: An addition coefficient applied to the resulting object. This is useful to adjust the brightness of the final image. Defaults to 0.
plot: Logical, whether to display the resulting RGB image (default: TRUE).

Value

A three-band RGB image represented as a pliman (EBImage) object.

Details

This function converts SpatRaster that contains the RGB bands into a three-band RGB image using pliman (EBImage). It allows you to specify the band indices for the red, green, and blue channels, as well as apply a scaling coefficient to the final image. By default, the resulting RGB image is displayed, but this behavior can be controlled using the plot parameter.

Examples

if (interactive() && requireNamespace("EBImage")) {

library(pliman)
# Convert a mosaic raster to an RGB image and display it
mosaic <- mosaic_input(system.file("ex/elev.tif", package="terra"))

# Convert a mosaic raster to an RGB image without displaying it
rgb_image <- mosaic_to_rgb(c(mosaic * 2, mosaic - 0.3, mosaic * 0.8))
plot(rgb_image)
}
#> Warning: The current raster is in the lat/lon coordinate system, which may result in processing errors when trying to segment individuals in the `mosaic_analyze()` function. It is highly suggested to reproject the raster using mosaic_project() with EPSG:32632
#> class       : SpatRaster 
#> dimensions  : 90, 95, 1  (nrow, ncol, nlyr)
#> resolution  : 0.008333333, 0.008333333  (x, y)
#> extent      : 5.741667, 6.533333, 49.44167, 50.19167  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326) 
#> source      : elev.tif 
#> name        : elevation 
#> min value   :       141 
#> max value   :       547