Re: [APML] O.T.: batch conversion of Tiff to JPG

["Michael Stecker" <mstecker@dslextreme.com>]

Hi Jerry and others in the Group:

My main reason for making a secondary mildly compressed back-up on DVD was
my concern regarding the longevity of these disks.  I have heard that the
dye in them can fade with time making the disk unreadable.  When I archived
my 70 GB of data that was on a whole draw filled with CD's, I noted that 4
of them had defective data.  Fortunately these were also on my hard drive so
I did not loose any files.  Any comments on the longevity of DVD's or
alternate ways to back-up would be appreciated.


Michael Stecker
mstecker@dslextreme.com

My Web Site:
http://www.homestead.com/mstecker/index.html (INDEX)
http://www.homestead.com/mstecker/astrogallery.html (Astroimage Index)
http://www.homestead.com/mstecker/placesindex.html (Places Index)



----- Original Message ----- 
From: "Jerry Lodriguss" <jerryapml@astropix.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Saturday, June 12, 2004 10:25 AM
Subject: RE: [APML] O.T.: batch conversion of Tiff to JPG


>
> Yea, I don't like them either, but for what Michael wants them for, I
think
> it's fine.  I plan on doing something similar, so that I can archive a
> whole library on just a couple of disks and then put them in widely
> separated geographical locations as a last-resort emergency backup.
>
> If you save the image at a setting of 10, 11 or 12 in Photoshop, you will
> be hard pressed to see any perceptible difference, even if you look at the
> image at 200 percent enlargement.
>
> Jerry
>
> At 11:48 AM 6/12/2004 -0500, you wrote:
> >Agreed.  I'd guess that 2:1 is probably the best you could average, tho'
> >astro images having a predominantly black background might do a little
> >better.
> >
> >But, you guys keep digging new galaxies out of the darkness, you're not
> >leaving much black background.
> >
> >I still don't like lossy compression that adds artifacts to my images!
8-)
>
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>
>
>


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