Dilation of the erosion with a flat structuring element; positions outside
the image are ignored (+Inf for erosion, -Inf for dilation). Binary 0/1
images give the binary opening; the result is anti-extensive and idempotent.
Usage
MorphologicalOpening(image, structure = matrix(1, 3, 3), origin = NULL)
Arguments
- image
Numeric matrix.
- structure
0/1 matrix (default 3 x 3 square).
- origin
c(row, col), 1-based (default the centre).
Value
list(opened, eroded).
References
Serra, J. (1982). Image Analysis and Mathematical Morphology.
Academic Press. Soille, P. (2003). Morphological Image Analysis, 2nd ed.
Springer.
Examples
img <- matrix(0, 5, 5)
img[2:3, 2:3] <- 1
img[4, 4] <- 1
MorphologicalOpening(img, matrix(1, 2, 2), c(1, 1))$opened
#> [,1] [,2] [,3] [,4] [,5]
#> [1,] 0 0 0 0 0
#> [2,] 0 1 1 0 0
#> [3,] 0 1 1 0 0
#> [4,] 0 0 0 0 0
#> [5,] 0 0 0 0 0
