Gimp - 2.4 Guía Del Usuario
GNU Image Manipulation Program
413 / 653
Figure 15.4: Simple blur
If you only want to blur the image a little bit--to soften it, as it were--you might use the simple "Blur" filter. In GIMP 2.2 this
runs automatically, without creating a dialog. The effect is subtle enough that you might not even notice it, but you can get a
stronger effect by repeating it. In GIMP 2.0 the filter shows a dialog that allows you to set a "repeat count". If you want a strong
blurring effect, this filter is too slow to be a good choice: use a Gaussian blur instead.
runs automatically, without creating a dialog. The effect is subtle enough that you might not even notice it, but you can get a
stronger effect by repeating it. In GIMP 2.0 the filter shows a dialog that allows you to set a "repeat count". If you want a strong
blurring effect, this filter is too slow to be a good choice: use a Gaussian blur instead.
Figure 15.5: Selective blur
The Selective Blur filter allows you to set a threshold so that only pixels that are similar to each other are blurred together. It is
often useful as a tool for reducing graininess in photos without blurring sharp edges. (In the example, note that the graininess of
the background has been reduced.) The implementation is much slower than a Gaussian blur, though, so you should not use it
unless you really need the selectivity.
often useful as a tool for reducing graininess in photos without blurring sharp edges. (In the example, note that the graininess of
the background has been reduced.) The implementation is much slower than a Gaussian blur, though, so you should not use it
unless you really need the selectivity.
Figure 15.6: Pixelize
The Pixelize filter produces the well-known "Abraham Lincoln" effect by turning the image into a set of large square pixels. (The
filter, in the Artistic Filters group, has a similar effect, but with irregular blobs instead of perfectly square pixels.)
Note
You can find a nice explanation of the Abraham Lincoln effect at [
You can find a nice explanation of the Abraham Lincoln effect at [
?
].
Figure 15.7: Motion blur