Re: [APML] Histograms

["Eddie Guscott" <eddie.guscott@blueyonder.co.uk>]

Alan

You're not alone. My histograms are similar to your description after
messing with levels
& curves, and yes, the images are improving, same as you say, but  don't
really know
if what I'm doing is right or if the histograms should be changing in this
manner - Thanks for the advice Chris.

I'm probably way behind you anyway (my first photo's are not focussed
properly or tracked properly) but
with trial and error I think I've solved these problems - getting to know
knife edge focussing and
understanding all the settings on the ST4).

My wife is certainly impressed with some of my results even if they're
nowhere near the standard produced
by members of this list.

Thanks to Chris Schur, I've also mamged to stack some I-Z photos. From 5
scans showing just the nucleus,
I now have a nice long blue ion tail (these photos taken through high cloud
& mist).

However, I agree with your comments - it would be nice to see the basic
steps needed spelled
out. For example - when using curves - how do you know whereabouts on the
diagonal line to
start making curves?

Alan, I'm sure we'll get there in the end - just very frustrating with a lot
of trial and error in the meantime.

Eddie Guscott

----- Original Message -----
From: "Alan Voetsch" <critter12952@yahoo.com>
To: "APML" <astro-photo@seds.org>
Sent: Sunday, April 28, 2002 9:43 PM
Subject: [APML] Histograms


> Hi all,
>
> As I've been playing around with Photoshop stuff:
> contrast/brightness; hue/saturation; color balance;
> levels; and curves, I've noticed the histogram changes
> from what looks like the silhouette of a hill, to
> something that looks like a picket fence if the pieces
> of wood were placed about an inch apart and viewed
> from about thirty feet away. In other words, lots of
> steep, narrow spikes. The images are improving, but is
> this what I want?
>
> You know what I'd really like to see? I'd like to see
> someone who knows what they're doing go through the
> basic processing steps. One at a time, right before my
> eyes. You all have filled in a lot of blanks for me
> but there are still gaps as wide as the Pacific Ocean
> in my hands-on knowledge.
>
> Thanks,
> Alan
>
>
>
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