Morphological image operations

Apply imaage morphological operations

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

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"))