Re: [APML] Processing comet

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

"At the night of photographing there was a very thin red glowing cloud in the front of the comet. "

Congratulations, you have taken a picture of Comet I-Z 'through' an Aurora image...joe  :)

Hrvoje Posilovic wrote:

>         Dear APML List this is my first posting to the list, and first I will like to apologize because of my bad english, but hope that you will understand me.
> For some time  reading yours discussions and looking beautiful images of the sky. And so decided to try mysef, a couple weeks ago I photographed the Ikeya-Zhang comet with 250 mm lens mounted on the small scope.
> At the night of photographing there was a very thin red glowing cloud in the front of the comet. And here starting my problems, after printing photographs
> there is terrible red "mist" all over the photography. The comet is very bright and with long tail.I scanned the photo and tryed to remove red "mist" in photoshop.First I completely deleted red channel and that significant improve
>  the image, but there is also some artifacts in blue and green channel. That blue and green artifacts is impossible to remove without affecting comet tail.
>         I thinking about that problem and concluded following : the "mist"
> pixels are randomly distributed in the image, but pixels that belong to the comet tail are distributed in some linear trend.
> I wonder is it possible to separate randomly and linear trended pixels and in similar way to clean the comet tail of the "mist".
>         I will like to improve that image if is possible, becouse that is my first image of the sky and I like it.
>
> I will appreciate any  help.
>
> Best Regards
> Hrvoje Posilovic
> from Croatia
>
>
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       "May You Go Among The Imperishable Stars"

                              Joe Mize
                      http://sfo.sciastro.net
                  mailto:jmize@globe-net.net
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