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1. Make a duplicate image by clicking Window/duplicate
OK |
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2. Go to image/ blur/ and choose gaussien blur.
Choose a radius of 2 or 3. (try 1or none at all and you'll see why
it won't work! The image MUST be blurred for this technique to work.)
OK
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3. Decrease your brightness/contrast by choosing
colors/ adjust/ brightness contrast. Slide the rulers to - 30 for
both brightness and contrast. OK ( I have only been using
-15 for each on my Saturn image) |
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4. Again choose image/ and this time, arithmetic.
Choose the source image #1 as the unaltered image. Choose source
image #2 as the altered image. Pick the subtract option under function.
Under channels I chose the all channels option and under the Modifiers
block I chose a divisor of 1 and a bias of 0. Clip color values is
checked. OK |
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5. You should now have a somewhat anemic looking,
but sharper image than the original. The next step I have not gotten
the hang of yet and that is restoring it to the original intensity.
Go back to Colors/adjust on the menu and choose highlight,midtone,
shadow. I have found that by decreasing the highlight ruler the brightness
of the image increases satisfactorily without sacrificing other features. |
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6. One other step that I found seems to bring
back the original luster is to actually average the two images ( original
and altered) back together again. This sharpens the image, while
retaining most of the qualities of the original. Use median, despeckle,
or soften to lessen any harshness of the image. |
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7. Also, I found that decreasing the amount of
brightness and contrast used has varying effects as well. Keep experimenting,
cause, I am too. I have found different programs react differently to the
same inputs. Jim's article was written for PhotoShop. It should be mentioned
that this technique definitely brings out the crepe ring and Enke division
on my Saturn images. I am still messing around with the Jupiter images. |
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