Re: [APML]: Star Trailing Reduced by Image Processing

["Robin Casady" <rcasady@CarmelCoast.com>]

The Astro-Photography Mailing List
------------------------------------

>If you take a look at the image I think you'll see what I mean. The original
>image is smeared slightly but the trailing removal technique smears the
>image much more. Although the stars look better the nebulosity in the image
>looks much worse, to me at any rate.  You need to study the removal
>technique in PW to understand why it happens this way.

I agree that the purple texture appears blurred in the processed image, but
I assumed that to be film grain, not nebula detail. In looking at filaments
of the nebula, I see them to be slightly thinner along the trailing
direction in the processed image. I assume that to mean the nebula is less
smeared in the processed image.

I don't currently have PW, so can't check it out.

Robin Casady
http://www.CarmelCoast.com

Casady & Greene, Inc.
http://www.casadyg.com