morphology: Morphological image operations

In stnava/ANTsR: ANTs in R: Quantification Tools for Biomedical Images

Morphological image operations

Description

Apply imaage morphological operations

Usage

morphology(
  input,
  operation,
  radius,
  type = "binary",
  value = 1,
  shape = "ball",
  radiusIsParametric = FALSE,
  thickness = 1,
  lines = 3,
  includeCenter = FALSE
)

Arguments

input	input image
operation	operation to apply "close" Morpholgical closing "dilate" Morpholgical dilation "erode" Morpholgical erosion "open" Morpholgical opening
radius	radius of structuring element
type	type of morphology "binary" Binary operation on a single value "grayscale" Grayscale operations
value	value to operation on (type='binary' only)
shape	shape of the structuring element ( type='binary' only ) "ball" spherical structuring element "box" box shaped structuring element "cross" cross shaped structuring element "annulus" annulus shaped structuring element "polygon" polygon structuring element
radiusIsParametric	used parametric radius boolean (shape='ball' and shape='annulus' only)
thickness	thickness (shape='annulus' only)
lines	number of lines in polygon (shape='polygon' only)
includeCenter	include center of annulus boolean (shape='annulus' only)

Value

antsImage is output

Author(s)

Avants BB

Examples

fi <- antsImageRead(getANTsRData("r16"), 2)
mask <- getMask(fi)
dilatedBall <- morphology(mask,
  operation = "dilate", radius = 3,
  type = "binary", shape = "ball"
)
erodedBox <- morphology(mask,
  operation = "erode", radius = 3,
  type = "binary", shape = "box"
)
openedAnnulus <- morphology(mask,
  operation = "open", radius = 5,
  type = "binary", shape = "annulus", thickness = 2
)
out <- morphology(mask, operation = "open", radius = 5, type = "binary", shape = "polygon")
out <- morphology(mask, operation = "open", radius = 5, type = "binary", shape = "cross")
out <- morphology(mask, operation = "close", radius = 5, type = "binary", shape = "polygon")
out <- morphology(mask, operation = "erode", radius = 5, type = "binary", shape = "polygon")
out <- morphology(mask, operation = "dilate", radius = 5, type = "binary", shape = "polygon")
testthat::expect_error(morphology(mask, operation = "open", radius = 5, shape = "hey"))

stnava/ANTsR documentation built on April 13, 2025, 4:10 a.m.