mkwired@[EMAIL PROTECTED]
wrote:
>On Jul 9, 8:01 pm, Owen <xem...@[EMAIL PROTECTED]
> wrote:
>> On Jul 10, 4:46 am, mkwi...@[EMAIL PROTECTED]
wrote:
>>
>>
>>
>> > On Jul 9, 9:08 am, Owen <xem...@[EMAIL PROTECTED]
> wrote:
>>
>> > > On Jul 8, 10:51 pm, mkwi...@[EMAIL PROTECTED]
wrote:
>>
>> > > > How can one remove the color of the background from the
foreground
>> > > > object? When someone stands to close to a green/blue screen when
a
>> > > > picture is taken, the color of the screen is mixed with the edges
of
>> > > > the object. I think this is called "color spill." I think
somehow
>> > > > using the color channels of GIMP will help.
....
>Original image:
http://www.2shared.com/file/3571495/e6f0e866/IMG_0656.html
You are in luck, and that one is easy to do. If it were
anything other than a gray colorless object it would be
exceedingly difficult to keep other colors and only
delete a single hue. But in this case all you really
need to do is delete *all* color!
Use paths, or the lasso selection tool, to select the
area of that object. Go all the way to the top of it,
because you don't want any lines marking affected areas
from those not affected. If you zoom in it will be much
easier to get it right. Note that the transition from
foreground to background is never just a one pixel is
and the adjacent pixel is not, but rather a 3 to 6 pixel
gradient. Try to select at about 1 or 2 pixels into the
gradient, towards that forground object. (Experience is
a good teacher, so try the whole thing three or four
times, and you'll get better results each time.)
Once you have a good selection area, go to the Colors
menu and select "Hue-Saturation". Then you have some
options on what you want. If you desaturate with it set
to "Master", all color is removed (it looks pretty good
too!). If you pick blue first and then cyan, you can
remove only the reflection of the blue foreground, and
leave that little bit of red along the left side in. Or
you could desaturate the red and leave the blue in. And
you can pick just how much of it is gone too.
--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@[EMAIL PROTECTED]
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