erode {imager} | R Documentation |
Erode/dilate image by a structuring element.
Description
Erode/dilate image by a structuring element.
Usage
erode(im, mask, boundary_conditions = TRUE, real_mode = FALSE)
erode_rect(im, sx, sy, sz = 1L)
erode_square(im, size)
dilate(im, mask, boundary_conditions = TRUE, real_mode = FALSE)
dilate_rect(im, sx, sy, sz = 1L)
dilate_square(im, size)
mopening(im, mask, boundary_conditions = TRUE, real_mode = FALSE)
mopening_square(im, size)
mclosing_square(im, size)
mclosing(im, mask, boundary_conditions = TRUE, real_mode = FALSE)
Arguments
im |
an image |
mask |
Structuring element. |
boundary_conditions |
Boundary conditions. If FALSE, pixels beyond image boundaries are considered to be 0, if TRUE one. Default: TRUE. |
real_mode |
If TRUE, perform erosion as defined on the reals. If FALSE, perform binary erosion (default FALSE). |
sx |
Width of the structuring element. |
sy |
Height of the structuring element. |
sz |
Depth of the structuring element. |
size |
size of the structuring element. |
Functions
-
erode_rect()
: Erode image by a rectangular structuring element of specified size. -
erode_square()
: Erode image by a square structuring element of specified size. -
dilate()
: Dilate image by a structuring element. -
dilate_rect()
: Dilate image by a rectangular structuring element of specified size -
dilate_square()
: Dilate image by a square structuring element of specified size -
mopening()
: Morphological opening (erosion followed by dilation) -
mopening_square()
: Morphological opening by a square element (erosion followed by dilation) -
mclosing_square()
: Morphological closing by a square element (dilation followed by erosion) -
mclosing()
: Morphological closing (dilation followed by erosion)
Examples
fname <- system.file('extdata/Leonardo_Birds.jpg',package='imager')
im <- load.image(fname) %>% grayscale
outline <- threshold(-im,"95%")
plot(outline)
mask <- imfill(5,10,val=1) #Rectangular mask
plot(erode(outline,mask))
plot(erode_rect(outline,5,10)) #Same thing
plot(erode_square(outline,5))
plot(dilate(outline,mask))
plot(dilate_rect(outline,5,10))
plot(dilate_square(outline,5))