Re: [APML] Tony's Green Gun

[Joe Mize <jmize@globe-net.net>]

Thkx Jeff, Thkx Tony.

     'Always like brain picking the experts.  This procedure is a definite must
do sometime soon.  Hey!  There's two Step-10's  <VBG>  ...joe  :)

Jeff Ball wrote:

> Here is Tony's green gun repost.
>
>  Here is the anti-noise, anti-green pixel technique:
>
>      Overview:   We will get PS to select the little bastards and then
> neutralize them
> with our ray gun!
>
> 1.   Blow up your image so that you can see the pixels easily.
> 2.  Eyedropper tool> point sample
> 3.  Select>color range> sampled colors
> 4.  Fuzziness= 50
> 5.  Clear the image box that shows your selection progress by clicking on
> the
> first
> eyedropper and selecting a red or magenta pixel.
> 6. Now click on a green pixel.. Switch to the eyedropper that has a " + "
> next to it...
> you will be accumilating your selections from now on.
> 7.  Choose a variety of the green weenies making sure you are going after
> green pixels only!
> Press the space bar to move around the image to choose them.
> 8.  After about 10-20 selections press OK.
> 9.   If you have something that is really green in the picture like the
> Dumbell Nebula,
> zoom back to full page (command/control 0) and using the lassoo tool with
> the
> option
> key depressed, subtract any selection from the green areas you want to keep.
> 10.  Go back to pixel magnification- hit command/control M for curves- go to
> the green
> curve and drag that puppy down until all the selected green pixels become
> neutralized
> with your anti-green ray gun. By subtracting green, you are in effect adding
> magenta,
> don't go too far, just neutralize the green to the surrounding pixel colors.
> 10.  Go back to full screen, hit command/control Z to toggle back and forth
> between
> the zapped version and the unzapped. Is it enough? Need more or less? Just
> go
> back
> to curves until you get what you want.
> 11.   Hit command/control D to deselct everything. All done. Green pixels
> got
> smoked...
>
> Footnotes:   Some times you might have to do this twice if you did not
> select
> enough green
> pixels the first time. You can also adjust the density of the selected
> pixels
> by switching
> from the green curve to the RGB curve. Some times you have to adjust the
> fuzziness
> up or down to get the right amount of "color choice" in the eyedropper tool.
>
>     I hope I have not omitted anything...
>
>      Have a good one,
>
>       Tony
>
> > -----Original Message-----
> > From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> > Behalf Of Joe Mize
> > Sent: Friday, August 31, 2001 9:57 AM
> > To: astro-photo@seds.org
> > Subject: Re: [APML] Tony's Green Gun
> >
> >
> > Tony;
> >
> >      How about creating a step-by-step procedure?...joe  :)
> >
> > Tonyhallas@aol.com wrote:
> >
> > > Dear Michael,
> > >
> > >      It's  not my name for this... but it fits. I outlined in
> > detail a few
> > > weeks ago a method to have Photoshop select the green "noise"
> > pixels in an
> > > astrophoto... these can come from various sources, most notably
> > old PPF or a
> > > noisy scanner. Once selected, these pixels can be "neutralized"
> > to create a
> > > smoother image with better color.
> > >
> > >       Have a good one,
> > >
> > >            Tony
> > >
> > > --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
> > >              Unsubscribe at <majordomo@seds.org>
> >
> > --
> >        "May You Go Among The Imperishable Stars"
> >
> >                               Joe Mize
> >                       http://sfo.sciastro.net
> >                   mailto:jmize@globe-net.net
> >                        Current Moon Phase
> >        http://tycho.usno.navy.mil/cgi-bin/phase.gif
> >
> >
> >
> > --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
> >              Unsubscribe at <majordomo@seds.org>
> >
>
> --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
>              Unsubscribe at <majordomo@seds.org>

--
       "May You Go Among The Imperishable Stars"

                              Joe Mize
                      http://sfo.sciastro.net
                  mailto:jmize@globe-net.net
                       Current Moon Phase
       http://tycho.usno.navy.mil/cgi-bin/phase.gif



--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>