Re: [APML] Photoshop conversion to jpeg

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

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.
Bert

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

----- Original Message ----- 
From: "Alan Voetsch" <alanv12952@yahoo.com>
To: "APML" <astro-photo@seds.org>
Sent: Tuesday, April 27, 2004 7:57 PM
Subject: [APML] Photoshop conversion to jpeg


> I have some large image files (30-50 mb) that I would like to reduce in
> size. Do I need to convert to 8 bit to convert copies of those images
> to jpegs?
>
> And, in doing so, would this compromise their questionable quality for
> display from CDrom as slides? Or, is there another option to reduce the
> sizes to managable levels?
>
> Thanks,
> Alan
>
>
>
>
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