denoise {EBImage}R Documentation

Blurring images

Description

Blurs an image with ImageMagick functions.

Usage

  blur(x, r=0, s=0.5)
  gblur(x, r=0, s=0.5)

Arguments

x

An Image object or an array.

r

A numeric value for the radius of the pixel neighbourhood. The default value 0 enables automatic radius selection.

s

The standard deviation of the Gaussian filter used for blurring. For reasonable results, r must be larger than s.

Details

blur uses an unspecified separable kernel. gblur uses a Gaussian kernel. The algorithms used by these ImageMagick functions are not well defined and hence, the usage of filter2 is preferable to blur or gblur.

Value

An Image object or an array, containing the blurred version of x.

Author(s)

Oleg Sklyar, osklyar@ebi.ac.uk, 2005-2007

References

ImageMagick: http://www.imagemagick.org.

See Also

filter2

Examples

   x = readImage(system.file("images", "lena.gif", package="EBImage"))
   if (interactive()) display(x)

   y = blur(x, r=3, s=2)
   if (interactive()) display(y, title='blur(x, r=3, s=2)')

   y = gblur(x, r=3, s=2)
   if (interactive()) display(y, title='gblur(x, r=3, s=2)')
[Package EBImage version 3.10.0 Index]