Re: [APML] Photoshop conversion to jpeg

["Bert Katzung" <katzung1@comcast.net>]

Hi Alan:
You need to use the "Save As" option in Photoshop in order to be offered
different formats. Then select the one you want (JPEG in this case) and type
in the name (if it's not there already).
Bert

Bert Katzung
katzung1@comcast.net
www.astronomy-images.com

----- Original Message ----- 
From: "Alan Voetsch" <alanv12952@yahoo.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, April 27, 2004 9:03 PM
Subject: Re: [APML] Photoshop conversion to jpeg


> Hey Bert,
>
> I'm pretty much done with them, at least what little I can do to them.
> I spent many hours last week working with levels, curves, etc... after
> re-scanning some older negs. First time scanning since I've had the
> newer computer (March '03), which is the reason I got this computer in
> the first place.
>
> The negs have been in 16 bit mode all the time.
> I wouldn't know about normal looking histograms, some of mine end up
> looking pretty strange. 8-)
>
> The other thing I was wondering about is; after converting to 8 bit,
> will the 'save' dialog box offer me the option of saving as a jpeg? Or,
> will I need to look somewhere else?
>
> For those wondering, these were the very first images I've processed in
> 18 months, hence the elementary questions. And let's face it, I've
> never claimed to be a Jerry Lodriguss anyway! 8-)
>
> Thanks Bert,
> Alan
>
> --- Bert Katzung <katzung1@comcast.net> wrote:
> > Hi Alan:
> > Yes, I believe that jpegs cannot be created from 16 bit files --- at
> > least
> > that's what photoshop tells me when I forget to convert from 16 to 8
> > bit
> > before asking it to make the jpegs for my web site. However, keeping
> > the 16
> > bits is really most important when you're stretching (especially) and
> > doing
> > other things in the early stages of processing astro files. Once you
> > have
> > the image worked up to a  normal-looking histogram, converting to 8
> > bits
> > won't have any major impact on the apparent quality of the image.
>
>
>
>
>
>
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