| morphology {EBImage} | R Documentation |
Functions to perform morphological operations on binary images.
dilate(x, kern, iter)
erode(x, kern, iter)
opening(x, kern, iter)
closing(x, kern, iter)
makeBrush(size, shape=c('box', 'disc', 'diamond'), step=TRUE)
x |
An Image object or an array.
x is considered as a binary image, whose pixels of value 0
are considered as background ones and other pixels as
foreground ones. |
kern |
An Image object or an array, containing the
structuring element. kern is considered as a binary image, whose
pixels of value 0 are considered as background ones and other pixels as
foreground ones. |
size |
A numeric containing the size of the brush, in pixels. |
shape |
A character vector indicating the shape of the brush. Can
be box, disc or diamond. Default is box. |
step |
a logical indicating if the brush is binary. Default is TRUE. |
iter |
Deprecated argument. |
erode applies the mask positioning its centre over every background pixel
(0), every pixel which is not covered by the mask is reset to foreground (1).
In this way image features grow in size.
dilate applies the mask positioning its centre over every foreground pixel
(!=0), every pixel which is not covered by the mask is reset to background (0).
In this way image features seem shrink in size.
opening is an erosion followed by a dilation and closing is a dilation
followed by an erosion.
makeBrush generates brushes of various sizes and shapes that can be used
as structuring elements.
dilate, erode, opening and closing return the
transformed Image object or array, after the corresponding
morphological operation.
makeBrush generates a 2D matrix containing the desired brush.
Oleg Sklyar, osklyar@ebi.ac.uk, 2006
x = readImage(system.file("images", "shapes.png", package="EBImage"))
if (interactive()) display(x)
kern = makeBrush(5, shape='diamond')
if (interactive()) display(kern, title='Structuring element')
if (interactive()) display(erode(x, kern), title='Erosion of x')
if (interactive()) display(dilate(x, kern), title='Dilatation of x')
## makeBrush
x = makeBrush(100, shape='diamond')
if (interactive()) display(x, title="makeBrush(100, shape='diamond')")
x = makeBrush(100, shape='disc', step=FALSE)
if (interactive()) display(x, title="makeBrush(100, shape='disc', step=FALSE)")