[lug] photo editor

Hugh Brown hugh at math.byu.edu
Mon Mar 6 14:26:49 MST 2000

I was hoping that there would be something easier than that.  I am
putting together a family webpage so I don't have much choice about how
the photo's were taken.  I just get to doctor them up and put them on
the page.  Are there digital cameras out there that don't have the flash
on the main axis of the lens?  How far off the axis does a flash need to
be before the reflection off the retina isn't picked up by the camera?


Wayde Allen wrote:
> On Mon, 6 Mar 2000, Hugh Brown wrote:
> > What specifically are you doing to get rid of the red-eye?  I don't know
> > gimp very well at all, and like I said the site was down earlier.
> As I indicated before, I usually try to eliminate red-eye in the photo
> taking process itself.  That is almost impossible with most of the point
> and shoot camera designs though, and that so-called red-eye reduction
> feature with the double flash really is more of a marketing feature than a
> useful tool in my opinion.  There are quite a few reasons NOT to use on
> axis flash besides red-eye.  At any rate, the main thing to do is to move
> the axis of the flash away from the main axis of the camera lens.  Red-eye
> is caused by the light bouncing off of the retina, and if the flash hits
> the subject at a different angle than you are photographing from, this
> reflection won't be seen by the camera.
> Of course that solution may not be possible, so you scan your image and
> work on it in the Gimp.  What I would probably do, note that I haven't
> actually tried this, is zoom in on each eye, select this region, select
> the occurrence of red in this region and re-map it to the normal eye color
> for the subject.  Another option would be to simply select the subject's
> eye color using the color picker and using a suitable paintbrush simply
> color the red away.  The other possible solution I can think of would be
> to setup the clone tool to copy the good eye coloring over the red
> coloring.
> The "real" Gimp guru on this list is Michael Hammel of Graphic Muse fame
> <http://www.graphics-muse.org/>. He is the author of "The Artists Guide to
> the Gimp"
> http://www1.clbooks.com:80/asp/BookInfo/BookInfo.asp?theisbn=1578310113,
> and can probably give you the click sequence needed to accomplish these
> manipulations.  He quite likely has some other possibly better solutions
> up his sleeve as well.  I know that he has been working on another book on
> the Gimp as well as chairing the CLIQ expo project.  I'm hoping he'd like
> to give us another presentation on this sometime this summer.
> If you are interested in photography and/or digital photography keep an
> eye on the Rocky Mountain Photographers Forum at http://rmp.opusis.com.
> I'm hoping we can build up a collection of digital photography
> information that is not exclusively based on Photoshop.
> - Wayde
>   (wallen at boulder.nist.gov)
> _______________________________________________
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