White-eye removal
Tristan Miller
I have some photos of my pet where the camera flash has caused "green-eye"
or "white-eye" (as opposed to the "red-eye" commonly seen with humans). My
father was able to remove it using the red-eye removal feature of some
photo editor from Microsoft, and the results looked great. I'd like to be
able to do this myself with the Gimp. Can someone suggest how?
I tried variations on the technique for red-eye removal suggested on
gimp.org (http://mmmaybe.gimp.org/tutorials/Red_Eye_Removal/) but wasn't
able to achieve anything natural-looking like the Microsoft-retouched
images.
For reference here are a couple of the photos:
http://www.dfki.uni-kl.de/~miller/tmp/Frettchen/Frettchen.2003-12-11.03.jpg
http://www.dfki.uni-kl.de/~miller/tmp/Frettchen/Frettchen.2003-11-23.03.jpg
Regards,
Tristan
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Ingo Guenther
> I tried variations on the technique for red-eye removal suggested on
> gimp.org (http://mmmaybe.gimp.org/tutorials/Red_Eye_Removal/) but wasn't
> able to achieve anything natural-looking like the Microsoft-retouched
> images.
Maybe, you should have put an example of the retouched fotos online, too.
At the moment I can only guess, what you have in mind...
Regards,
Ingo. -> ingoASCII(64)freio.de
Tristan Miller
In article <20040110185755...@stardock.com>, Ingo Guenther wrote:
>> I tried variations on the technique for red-eye removal suggested on
>> gimp.org (http://mmmaybe.gimp.org/tutorials/Red_Eye_Removal/) but wasn't
>> able to achieve anything natural-looking like the Microsoft-retouched
>> images.
>
> Maybe, you should have put an example of the retouched fotos online, too.
> At the moment I can only guess, what you have in mind...
Sure thing... here's the photo my Dad retouched.
http://www.dfki.uni-kl.de/~miller/tmp/Frettchen/Frettchen_Microsoft.jpg
robertS
The trick is a slight modification of the red eye removal technique you
cited. In this case, if you use color picker, you will notice that all
the colors (3 primaries that is) are present in the white eye at almost
equal amounts. Therefore, you want to burn all the colors, so skip the
"select the red channel" step and just follow the rest of the tutorial.
If you want that white spot (not owning a ferret, I don't know if looks
more natural with or without it), after you are through darkening the eye,
change burn to dogde and repeatly click in one spot.
Ingo Guenther
> >> I tried variations on the technique for red-eye removal suggested on
> >> gimp.org (http://mmmaybe.gimp.org/tutorials/Red_Eye_Removal/) but
> >wasn't> able to achieve anything natural-looking like the
> >Microsoft-retouched> images.
> >
> > Maybe, you should have put an example of the retouched fotos online,
> > too. At the moment I can only guess, what you have in mind...
>
> Sure thing... here's the photo my Dad retouched.
>
> http://www.dfki.uni-kl.de/~miller/tmp/Frettchen/Frettchen_Microsoft.jpg
I see, what the filter basically does is to replace the white eye with a
dark one that has got a white "phong" spot on it. This is to simulate the
reflection of the light on the eye itself - not the retina, which is
causing the red/white eye effect.
You can achive this with Gimp quite easily by doing the following:
- Select the eye with the "Select elliptical regions" tool, with activated
Antialiasing and Feather set to 1.5 or 3..0 in the "Tool Options"
- Use the "Pick colors" tool to get the brightest color in the image as
your current foreground, the darkest one as your current background color.
- Choose the "Fill with a color gradient" tool and change its settings to
Blend: FG to BG
Gradient: Radial
Repeat: None
- Fill the selection by clicking into the region and moving the mouse by
about 2 or 3 pixels. The starting point should be the point where you want
the highlight to appear, the ending point depends on the size of the eye.
In your Frettchen.2003-12-11.03.jpg image the highlight on the orange gives
you a good hint on where the eye has to get its one.
See http://www.freio.de/ingo/files/Frettchen.jpg for the result.
Regards,
Ingo. -> ingoASCII(64)freio.de
Tsu Dho Nimh
>Greetings.
>
>I have some photos of my pet where the camera flash has caused "green-eye"
>or "white-eye" (as opposed to the "red-eye" commonly seen with humans).
That's a common problem with non-human subjects. It's the
light-reflective layer that most of them have at the back of
their eyes.
>father was able to remove it using the red-eye removal feature of some
>photo editor from Microsoft, and the results looked great. I'd like to be
>able to do this myself with the Gimp. Can someone suggest how?
>
>I tried variations on the technique for red-eye removal suggested on
>gimp.org (http://mmmaybe.gimp.org/tutorials/Red_Eye_Removal/) but wasn't
>able to achieve anything natural-looking like the Microsoft-retouched
>images.
Cute ferret!
Eye retouching is easy ...
Select a color from the normal-colored part, use the "magic wand"
that selects by color, select the white part of the eye and fill
it with the selected color from the dark part.
I haven't looked at ferrets closely, but I don't think they have
a prominent pupil - th eonly one I have available seems to have
small beady dark eyes.
Tsu Dho Nimh
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