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<TITLE>sane-devel: 16 bit support for scanimage</TITLE>
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<META NAME="Author" CONTENT="Peter Kirchgessner (peter@kirchgessner.net)">
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<META NAME="Subject" CONTENT="16 bit support for scanimage">
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<H1>16 bit support for scanimage</H1>
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<!-- name="Peter Kirchgessner" -->
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<!-- subject="16 bit support for scanimage" -->
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<!-- id="3904C345.B3AE83E6@kirchgessner.net" -->
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<STRONG>From:</STRONG> Peter Kirchgessner (<A HREF="mailto:peter@kirchgessner.net?Subject=Re:%2016%20bit%20support%20for%20scanimage&In-Reply-To=<3904C345.B3AE83E6@kirchgessner.net>"><EM>peter@kirchgessner.net</EM></A>)<BR>
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<STRONG>Date:</STRONG> Mon Apr 24 2000 - 14:57:25 PDT
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0263.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0263.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0268.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0279.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</A>
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<P>
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Hi,
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<BR>
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<P>enclosed is a proposal for 16 bit support for scanimage. It adds the
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<BR>
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possibility to save scans as TIFF-files which has both 8 and 16 bit
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<BR>
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support. It is not based on libtiff, it is just straightforward. The
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<BR>
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TIFF-files are uncompressed like the PNM-files. If a compression is
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<BR>
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needed, it should be done in a postprocessing step.
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<BR>
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The included patch is to be applied to the frontend-directory of SANE
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<BR>
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1.0.2. It modifies scanimage.c and Makefile.in. It creates two new files
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<BR>
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stiff.[hc]. Configure must be run again to build the new Makefile.
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<BR>
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To get TIFF-output from scanimage, it must be started with -o or
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<BR>
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--output-tiff.
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<BR>
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The patch also modifies the PNM-output. For a depth larger than 8 bit, a
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<BR>
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maxval of 65535 is written instead of 255. At least xv on Intel-Linux
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<BR>
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can read these files, even if the netpbm-toolbox does not specify binary
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<BR>
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PPMs with maxval > 255.
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<BR>
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<P>I could not test 16 bit TIFF-output on non-Intel based Systems. Would be
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<BR>
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nice if someone could do that.
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<BR>
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Any suggestions are welcome. Maybe these changes then can get into the
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<BR>
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next official SANE release.
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<BR>
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<P>--Peter
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<BR>
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<P><PRE>
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--
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Peter Kirchgessner
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WWW: <A HREF="http://www.kirchgessner.net">http://www.kirchgessner.net</A>
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e-mail: <A HREF="mailto:peter@kirchgessner.net?Subject=Re:%2016%20bit%20support%20for%20scanimage&In-Reply-To=<3904C345.B3AE83E6@kirchgessner.net>">peter@kirchgessner.net</A>
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</PRE>
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<HR NOSHADE>
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<UL>
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<LI>application/octet-stream attachment: <A HREF="att-0237/01-patch-scanimage-16bit.gz">patch-scanimage-16bit.gz</A>
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</UL>
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<!-- attachment="01-patch-scanimage-16bit.gz" -->
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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:%2016%20bit%20support%20for%20scanimage&In-Reply-To=<3904C345.B3AE83E6@kirchgessner.net>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0263.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0263.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0268.html">Petter Reinholdtsen: "Re: 16 bit support for scanimage"</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>Mon Apr 24 2000 - 15:00:53 PDT</EM>
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