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<TITLE>sane-devel: Re: Which scanners REALLY provide 36 bit output? HP?</TITLE>
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<META NAME="Author" CONTENT="Steve Underwood (steveu@coppice.org)">
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<META NAME="Subject" CONTENT="Re: Which scanners REALLY provide 36 bit output? HP?">
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<H1>Re: Which scanners REALLY provide 36 bit output? HP?</H1>
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<!-- received="Wed Dec 13 17:50:37 2000" -->
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<!-- name="Steve Underwood" -->
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<!-- subject="Re: Which scanners REALLY provide 36 bit output? HP?" -->
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<STRONG>From:</STRONG> Steve Underwood (<A HREF="mailto:steveu@coppice.org?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<3A38292F.CB4E5C8F@coppice.org>"><EM>steveu@coppice.org</EM></A>)<BR>
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<STRONG>Date:</STRONG> Wed Dec 13 2000 - 17:58:07 PST
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<P>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0155.html">Tobias Nijweide: "Re: HP5300C mini HowTo"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0153.html">Stephen Williams: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0153.html">Stephen Williams: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0156.html">Nick Lamb: "offtopic/ document storage (was Re: Which scanners REALLY provide 36 bit output? HP?)"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0071.html">Steve Underwood: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0156.html">Nick Lamb: "offtopic/ document storage (was Re: Which scanners REALLY provide 36 bit output? HP?)"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0159.html">Bob Washburne: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<HR NOSHADE><P>
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<P>
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Stephen Williams wrote:
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<BR>
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<P><EM>> And none of this is good news to someone who wants to create archival
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</EM><BR>
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<EM>> images of precious documents. We've been there, too, and the conclusion
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</EM><BR>
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<EM>> is that for all but the most extreme cases, good ol' 12bit JPEG (and an
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</EM><BR>
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<EM>> environmentally controlled vault) are about as good as is worth the
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</EM><BR>
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<EM>> effort. If some hot new image processing technique comes to light, you
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</EM><BR>
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<EM>> are just going to have to accept the reality that you will need to open
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</EM><BR>
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<EM>> the vault and rescan the document with the lighting/sensors required
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</EM><BR>
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<EM>> of the technique.
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</EM><BR>
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<P>If you want to do archival storage of documents, do it on paper. This will
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<BR>
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greatly outlast any digital storage medium. CDs can fail in as little as a year
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<BR>
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(any make) despite the claims of 25 years for a pressed CD (which isn't that
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<BR>
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impressive anyway) and 70-100 years for CDR (which seems completely bogus). I
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<BR>
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live in a sauna, and things tend to fail fast, but even in dryer climates you
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<BR>
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can never rely of any digital medium. Some years ago in the UK we stored
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<BR>
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precious reels of data tape in a fully controlled environment to the makers
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<BR>
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(Ampex) spec. In just two years the layers of tape had coalesced so well we
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<BR>
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could saw through the block of tape like it was a block of wood. Of course such
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<BR>
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extreme failure doesn't always happen. However, since you cannot tell when it
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<BR>
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will, you cannot rely of these media. Close monitoring and recopying seems a
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<BR>
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useless precaution, when degradation can occur so fast.
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<BR>
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<P>Regards,
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<BR>
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Steve
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<BR>
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<P><P><P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<3A38292F.CB4E5C8F@coppice.org>">majordomo@mostang.com</A>
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</PRE>
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<UL>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0155.html">Tobias Nijweide: "Re: HP5300C mini HowTo"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0153.html">Stephen Williams: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0153.html">Stephen Williams: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<!-- nextthread="start" -->
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0156.html">Nick Lamb: "offtopic/ document storage (was Re: Which scanners REALLY provide 36 bit output? HP?)"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0071.html">Steve Underwood: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0156.html">Nick Lamb: "offtopic/ document storage (was Re: Which scanners REALLY provide 36 bit output? HP?)"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0159.html">Bob Washburne: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Wed Dec 13 2000 - 18:35:56 PST</EM>
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