Michael Soibelman <in-the@[EMAIL PROTECTED]
> wrote:
>Ofnuts wrote:
>
>> Ignoramus23731 wrote:
>>> GIMP has some nice selection tools. But how can I make a selection
>>> comprising two disjoint objects?
>>>
>>
>> Press the ****ft key while doing your second selection (this adds a
small
>> "plus" sign next to the cursor). You can also press the control key to
>> substract your selection from the existing one; for instance, to select
>> a ring, first select the outer circle, then Ctrl-select the inner one.
>>
>
>Or select outer ring and then ->select (border, shrink, grow) depending
on
>what you are after..
Just for fun, here's an exercise for Ignoramus23731 to try!
Choose a picture of a person or other object that is
nice, but that has an overly distracting background.
Using the Free Select tool, try to carefully make a
selection that includes the person/object and excludes
the background. Then zoom in very close (enough to see
individual pixels), and use the "Add" and "Subtract"
modes for Select to modify the selected area to make it
as nearly perfect as possible, separating the background
entirely.
At this point running USM, noise reduction, sharpening
or whatever else is desired to perk up the selected area
can be done, but that isn't the point of this exercise.
Go to the Select menu, and invert the selection, and
then feather the selection (at say, 20 pixels). Then go
to Filters->Blur->Gaussian and set the blur to 10 pixels
and blur the selection (which is now the background).
Then iterate through a series of blur commands. Go to
the Select-Reduce menu and reduce the selection by 20
pixels (click on the box to make sure it does not reduce
from the image edges), go to the Select-Feather menu and
feather it by 30 pixels, go to the Filters-Blur-Gaussian
menu and blur it by 20 pixels.
Repeat the above cycle 3 to 5 times, depending on how it
looks to you. Each time increase each parameter, but
keep the feather larger than the increase in size and
perhaps double the amount of blur each time (the
ultimate in "blur" is somewhere from 80 to 200 pixels,
as that will virtually obliterate all detail).
The effect depends on the size of the image, and also on
what is in the image. But the basic idea is to
*totally* blur the background without leaving
demarcation lines for each time an area is blurred, and
in particular to not show too much effect right at the
edge between the desired object and the background.
--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@[EMAIL PROTECTED]
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