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[APML] John Laborde's version (Need help with this M81-M82 shot)
Hey John.
I'm sorry I left it in such bad shape. I didn't bother to dust it
because of the print. The neg is being dropped off for cleaning today.
So, I'll probably re-scan when I get it back.
It's neat what you were able to do about the print, i can barely see
it. The steps you used are a mystery to me, as is most of PS. Nice job.
Alan
--- John Laborde <jlaborde@ix.netcom.com> wrote:
> Here are the before and after images:
> http://aisig.sdaa.org/astroblogDetail.asp?imgID=404&UserID=67
>
> All processing was done in PhotoShop 7. Here is what I did:
>
> First I thought it would be possible to flat field the image to
> remove
> vignetting and at the same time remove the thumb print. On a copy of
> the
> original, I removed most of the stars with a mild setting of the
> "dust &
> scratches" noise filter so as not to blur the finger print too much.
> For
> this example I use radius 15, threshold 14.
>
> Removed the rest of the stars with the clone tool and a fussy brush
> at
> about 18 pixels. Next I removed the galaxies also with the clone tool
>
> but a larger brush. Care must be taken to get a smooth and seamless
> background when erasing the galaxies.
>
> Added a slight "gaussian blur" to the image to smooth out cloning
> marks.
> The results is an image with just the background but still showing
> the
> detail of the thumb print.
>
> Opened up the original image and did an "Applied Image" to subtract
> the
> background image from the original using blending mode "subtract"
> with
> an offset of 50.
>
> Removed dust spots and hairs with the clone tool.
>
> Reset dark point with levels for each color and applied curves to
> bring
> out the fainter details and to get the colors and density to match
> the
> original image.
>
> I tweaked "selective colors (mainly blacks and neutrals) to set a
> slightly bluish background sky. I also tweaked the hue/saturation for
>
> red and blue slightly.
>
> I applied Neatimage, a grain smoothing application, to remove some of
>
> the image grain, and finally a small amount of unsharp mask filter.
=====
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