Morphological transformations using terra (optimized for VisiumHD)

Terra-only implementation of focal operations for connecting outlier regions.

Usage

focal_transformations_terra(r, min_cluster_size = 5)

Arguments

r

A SpatRaster object with binary values (1=outlier, 0=normal).

min_cluster_size

Minimum size (in bins) for small hole removal.

Value

A SpatRaster object after applying focal transformations (fill, outline, star) and small hole removal.

Examples

# Create a dummy binary SpatRaster for demonstration
if (requireNamespace("terra", quietly = TRUE)) {
  r <- terra::rast(matrix(c(0, 0, 0, 0, 1, 0, 0, 0, 0), nrow = 3),
    extent = terra::ext(0, 3, 0, 3)
  )
  # Run the focal transformations
  # result <- focal_transformations_terra(r, min_cluster_size = 5)
}