kopia lustrzana https://gitlab.com/sane-project/website
113 wiersze
4.8 KiB
HTML
113 wiersze
4.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
|
|
"http://www.w3.org/TR/REC-html40/loose.dtd">
|
|
<HTML>
|
|
<HEAD>
|
|
<TITLE>sane-devel: big endian vs little endian</TITLE>
|
|
<META NAME="Author" CONTENT="William L. Sebok (wls@astro.umd.edu)">
|
|
<META NAME="Subject" CONTENT="big endian vs little endian">
|
|
</HEAD>
|
|
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
|
|
<H1>big endian vs little endian</H1>
|
|
<!-- received="Thu Mar 29 14:59:06 2001" -->
|
|
<!-- isoreceived="20010329225906" -->
|
|
<!-- sent="Thu, 29 Mar 2001 18:10:30 -0500 (EST)" -->
|
|
<!-- isosent="20010329231030" -->
|
|
<!-- name="William L. Sebok" -->
|
|
<!-- email="wls@astro.umd.edu" -->
|
|
<!-- subject="big endian vs little endian" -->
|
|
<!-- id="200103292310.SAA02591@earth.astro.umd.edu" -->
|
|
<STRONG>From:</STRONG> William L. Sebok (<A HREF="mailto:wls@astro.umd.edu?Subject=Re:%20big%20endian%20vs%20little%20endian&In-Reply-To=<200103292310.SAA02591@earth.astro.umd.edu>"><EM>wls@astro.umd.edu</EM></A>)<BR>
|
|
<STRONG>Date:</STRONG> Thu Mar 29 2001 - 15:10:30 PST
|
|
<P>
|
|
<!-- next="start" -->
|
|
<LI><STRONG>Next message:</STRONG> <A HREF="0240.html">Robert Voigt: "Xsane build problems"</A>
|
|
<UL>
|
|
<LI><STRONG>Previous message:</STRONG> <A HREF="0238.html">Massimo Maiurana: "Re: xscanimage as gimp plug-in"</A>
|
|
<!-- nextthread="start" -->
|
|
<LI><STRONG>Reply:</STRONG> <A HREF="0253.html">Oliver Rauch: "Re: big endian vs little endian"</A>
|
|
<LI><STRONG>Reply:</STRONG> <A HREF="0254.html">Mick Barry: "Re: big endian vs little endian"</A>
|
|
<!-- reply="end" -->
|
|
<LI><STRONG>Messages sorted by:</STRONG>
|
|
<A HREF="date.html#239">[ date ]</A>
|
|
<A HREF="index.html#239">[ thread ]</A>
|
|
<A HREF="subject.html#239">[ subject ]</A>
|
|
<A HREF="author.html#239">[ author ]</A>
|
|
</UL>
|
|
<HR NOSHADE><P>
|
|
<!-- body="start" -->
|
|
<P>
|
|
I think that there could be "big vs little endian" issues if one does network
|
|
<BR>
|
|
scanning and the scanner is hung off of a machine with a different byte order
|
|
<BR>
|
|
than the machine running the front end.
|
|
<BR>
|
|
<P>The scanner (a Umax 2400S) was attached to a Sparc IPX machine (an old spare
|
|
<BR>
|
|
machine) running Solaris 7. The frontend was xsane 0.72 on a Linux Intel
|
|
<BR>
|
|
machine running Mandrake 7.1. On both machines sane itself had been
|
|
<BR>
|
|
upgraded to version 1.0.4. I ran xsane stand-alone, rather than as a gimp
|
|
<BR>
|
|
plugin. On the xsane "standard options" window I selected a "Bit Depth" of 12.
|
|
<BR>
|
|
I scanned to a png file as that format supports 16 bit data. I viewed the
|
|
<BR>
|
|
image with the gimp as the gimp is able to view 16 bit png's, although it
|
|
<BR>
|
|
converts it to 8 bits internally. The image came out looking like random noise.
|
|
<BR>
|
|
My guess is that I was viewing the bytes of lower significance. I tried this
|
|
<BR>
|
|
with both gimp-1.2.1 and gimp-1.0.4 on both Linux Intel and Sparc Solaris
|
|
<BR>
|
|
machines with the same results. Finally I rescanned the image with the
|
|
<BR>
|
|
xsane 0.72 running on a Sparc Solaris machine (different than the machine with
|
|
<BR>
|
|
the scanner). Again Bit Depth was set to 12 and the png format was used. This
|
|
<BR>
|
|
scan now came out fine.
|
|
<BR>
|
|
<P>Has anyone else had this problem? Does the sane protocol have provision for
|
|
<BR>
|
|
the case where front and back ends are on machines with different byte orders?
|
|
<BR>
|
|
<P>Bill Sebok Computer Software Manager, Univ. of Maryland, Astronomy
|
|
<BR>
|
|
Internet: <A HREF="mailto:wls@astro.umd.edu?Subject=Re:%20big%20endian%20vs%20little%20endian&In-Reply-To=<200103292310.SAA02591@earth.astro.umd.edu>">wls@astro.umd.edu</A> URL: <A HREF="http://www.astro.umd.edu/~wls/">http://www.astro.umd.edu/~wls/</A>
|
|
<BR>
|
|
<P><PRE>
|
|
--
|
|
Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
|
|
To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20big%20endian%20vs%20little%20endian&In-Reply-To=<200103292310.SAA02591@earth.astro.umd.edu>">majordomo@mostang.com</A>
|
|
</PRE>
|
|
<P><!-- body="end" -->
|
|
<HR NOSHADE>
|
|
<UL>
|
|
<!-- next="start" -->
|
|
<LI><STRONG>Next message:</STRONG> <A HREF="0240.html">Robert Voigt: "Xsane build problems"</A>
|
|
<LI><STRONG>Previous message:</STRONG> <A HREF="0238.html">Massimo Maiurana: "Re: xscanimage as gimp plug-in"</A>
|
|
<!-- nextthread="start" -->
|
|
<LI><STRONG>Reply:</STRONG> <A HREF="0253.html">Oliver Rauch: "Re: big endian vs little endian"</A>
|
|
<LI><STRONG>Reply:</STRONG> <A HREF="0254.html">Mick Barry: "Re: big endian vs little endian"</A>
|
|
<!-- reply="end" -->
|
|
<LI><STRONG>Messages sorted by:</STRONG>
|
|
<A HREF="date.html#239">[ date ]</A>
|
|
<A HREF="index.html#239">[ thread ]</A>
|
|
<A HREF="subject.html#239">[ subject ]</A>
|
|
<A HREF="author.html#239">[ author ]</A>
|
|
</UL>
|
|
<!-- trailer="footer" -->
|
|
<HR NOSHADE>
|
|
<P>
|
|
<SMALL>
|
|
<EM>
|
|
This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
|
|
: <EM>Thu Mar 29 2001 - 15:01:34 PST</EM>
|
|
</EM>
|
|
</SMALL>
|
|
</BODY>
|
|
</HTML>
|