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<TITLE>sane-devel: RE: Getting compressed B/W image data from Fujitsu</TITLE>
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<META NAME="Author" CONTENT="Armistead, Jason (armistej@oeca.otis.com)">
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<META NAME="Subject" CONTENT="RE: Getting compressed B/W image data from Fujitsu M3096GXm scann er">
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<H1>RE: Getting compressed B/W image data from Fujitsu M3096GXm scann er</H1>
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<!-- received="Sun Feb 4 22:00:49 2001" -->
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<!-- name="Armistead, Jason" -->
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<!-- email="armistej@oeca.otis.com" -->
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<!-- subject="RE: Getting compressed B/W image data from Fujitsu M3096GXm scann er" -->
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<STRONG>From:</STRONG> Armistead, Jason (<A HREF="mailto:armistej@oeca.otis.com?Subject=RE:%20Getting%20compressed%20B/W%20image%20data%20from%20Fujitsu%20M3096GXm%20scann er&In-Reply-To=<3CB744EAA897D211BB890008C728AEA8059E5F95@otausminexs.au.otis.com>"><EM>armistej@oeca.otis.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun Feb 04 2001 - 21:57:32 PST
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0026.html">Heikki Kantola: "Re: SANE 1.0.4 and SnapScan library problems"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0027.html">abel deuring: "Re: Getting compressed B/W image data from Fujitsu M3096GXm scann er"</A>
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<HR NOSHADE><P>
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<P>
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Hi Tom (and all on the SANE list)
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<BR>
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<P>Thanks to Tom for his pointing out that his sane-bh backend DOES support
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<BR>
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compression.
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<BR>
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<P>Why isn't it directly integrated with SANE 1.04 and part of the standard
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<BR>
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distribution ? The latest sane-bh patches are against 1.03, so I guess
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<BR>
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there'll be some extra work required to make it go together with 1.04 ?
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<BR>
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<P>The obvious question arises : When is "the next major version of SANE" due
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<BR>
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to be released ? It would seem to me (maybe naively) that scanner-based
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<BR>
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compression is something that has been overlooked in SANE up until now.
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<BR>
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<P>Is there any reason that a "reference model" scanner from the SCSI II spec
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<BR>
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wasn't developed as part of SANE, as a basis for all others to be modelled
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<BR>
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on ? Obviously every manufacturer likes to "roll their own" feature set,
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<BR>
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but we seem to be treading on each other's toes by re-inventing at least
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<BR>
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some portion of the wheel for each new scanner. e.g. with sense code /
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<BR>
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qualifier decoding for the various error messages such as ADF jamming.
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<BR>
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Perhaps it's time to look at redesigning the backends to deal with these
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<BR>
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e.g. a function called sane_scsi2_asc60_asq00 might actually handle the SCSI
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<BR>
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2 ASC60, ASQ00 response code "Lamp failure" for all scanners. Perhaps this
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<BR>
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also lends itself to other (multi language support ?) also if the SANE API
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<BR>
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could be extended to cover some sort of SANE_Status to text translation
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<BR>
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scheme.
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<BR>
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<P>Or am I just barking up the wrong tree ???
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<BR>
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<P>There also seems to be a large discrepancy in the level of diagnostic given
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<BR>
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in each driver e.g. the Microtek driver seems to be absolutely LOADED with
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<BR>
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debugging information (over 119 printfs, plus stacks of DBG callouts), but
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<BR>
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others have very few at all.
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<BR>
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<P>Then again, maybe I'm just used to being pampered by pay-ware rather than
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<BR>
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GPL-ware ;-)
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<BR>
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<P>Is there a list of proposed features (or just a wish list by SANE users) for
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<BR>
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the next version ?
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<BR>
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<P>Just curious
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<BR>
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<P>Jason (who is subscribed to the list and so doesn't need cc-ing)
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<BR>
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<P><P><P>-----Original Message-----
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<BR>
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From: Tom Martone [mailto:<A HREF="mailto:tom@martoneconsulting.com?Subject=RE:%20Getting%20compressed%20B/W%20image%20data%20from%20Fujitsu%20M3096GXm%20scann er&In-Reply-To=<3CB744EAA897D211BB890008C728AEA8059E5F95@otausminexs.au.otis.com>">tom@martoneconsulting.com</A>]
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<BR>
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Sent: Saturday, 3 February 2001 12:26
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<BR>
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To: <A HREF="mailto:sane-devel@mostang.com?Subject=RE:%20Getting%20compressed%20B/W%20image%20data%20from%20Fujitsu%20M3096GXm%20scann er&In-Reply-To=<3CB744EAA897D211BB890008C728AEA8059E5F95@otausminexs.au.otis.com>">sane-devel@mostang.com</A>
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<BR>
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Subject: Re: Getting compressed B/W image data from Fujitsu M3096GXm
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<BR>
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scanner
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<BR>
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<P><P>Greetings,
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<BR>
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<P>Armistead, Jason wrote:
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<BR>
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<EM>>
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</EM><BR>
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<EM>> I would have thought that some of the top-end high volume
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</EM><BR>
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<EM>> scanners like Bell & Howell would surely support on-board compression, and
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</EM><BR>
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<EM>> that someone, somewhere might have added them to SANE.
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</EM><BR>
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<P>The Bell & Howell Copiscan II series does support several compressed
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<BR>
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formats (CCITT G3, CCITT G3-2D, CCITT G4) and the SANE driver sane-bh
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<BR>
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supports these. To fully utilize the compressed formats, a patch to
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<BR>
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sane.h is necessary which adds several new frametypes.
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<BR>
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<P> /* optional frames */
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<BR>
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SANE_FRAME_TEXT = 10, /* Human readable text non-image data */
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<BR>
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SANE_FRAME_JPEG = 11, /* JPEG compressed image */
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<BR>
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SANE_FRAME_G31D = 12, /* Group 3 1D compressed image */
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<BR>
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SANE_FRAME_G32D = 13, /* Group 3 2D compressed image */
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<BR>
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SANE_FRAME_G42D = 14 /* Group 4 2D compressed image */
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<BR>
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<P>Compressed formats are not supported in the current SANE standard,
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<BR>
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and are to be addressed in the next major version of SANE. Unofficially,
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<BR>
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and non-standardly, I guess, a simple addition of a few enumeration
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<BR>
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values and a cooperating front and back end is all you would need
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<BR>
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to get this going on your compression-enabled scanner.
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<BR>
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<P>Happy scanning,
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<BR>
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Tom
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<BR>
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<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:%20Getting%20compressed%20B/W%20image%20data%20from%20Fujitsu%20M3096GXm%20scann er&In-Reply-To=<3CB744EAA897D211BB890008C728AEA8059E5F95@otausminexs.au.otis.com>">majordomo@mostang.com</A>
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<P>--
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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:%20Getting%20compressed%20B/W%20image%20data%20from%20Fujitsu%20M3096GXm%20scann er&In-Reply-To=<3CB744EAA897D211BB890008C728AEA8059E5F95@otausminexs.au.otis.com>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0026.html">Heikki Kantola: "Re: SANE 1.0.4 and SnapScan library problems"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0024.html">Armistead, Jason: "RE: Getting compressed B/W image data from Fujitsu M3096GXm scann er"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0027.html">abel deuring: "Re: Getting compressed B/W image data from Fujitsu M3096GXm scann er"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0027.html">abel deuring: "Re: Getting compressed B/W image data from Fujitsu M3096GXm scann er"</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>Sun Feb 04 2001 - 22:01:29 PST</EM>
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