rPatches: Determine foreground patches in a raster

In EhrmannS/rasterTools: Obtain and process earth observation data

Description

(Foreground) Patches are sets of cells which are connected either directly or via other cells in a binarised raster and which should hence be treated as distinct objects.

Usage

rPatches(obj, kernel = NULL, background = NULL)

Arguments

obj	[RasterLayer(1)] The object to modify.
kernel	[matrix(1)] scan the raster with this kernel (default is a 3 by 3 cells diamond kernel).
background	[integerish(1)] the value any cell with value NA should have.

Value

A RasterLayer of the same dimension as obj, in which neighbouring cells of the foreground have been assigned the same value, forming patches.

See Also

Other operators to determine objects: rCentroid, rSkeletonise

Examples

input <- rtRasters$continuous
binarised <- rBinarise(input, thresh = 30)
visualise(rPatches(binarised))

EhrmannS/rasterTools documentation built on Sept. 4, 2019, 10:34 a.m.