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<!-- received="Sun Jun 28 23:19:13 1998 PDT" -->
<!-- sent="Mon, 29 Jun 1998 08:18:04 +0200" -->
<!-- name="Christian Müller" -->
<!-- email="Christian.Mueller@ezmd.hl.siemens.de" -->
<!-- subject="Color Problems with SANE 0.73 and Microtek Scanmaker E6" -->
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<title>sane-devel: Color Problems with SANE 0.73 and Microtek Scanmaker E6</title>
<h1>Color Problems with SANE 0.73 and Microtek Scanmaker E6</h1>
<b>Christian Müller</b> (<a href="mailto:Christian.Mueller@ezmd.hl.siemens.de"><i>Christian.Mueller@ezmd.hl.siemens.de</i></a>)<br>
<i>Mon, 29 Jun 1998 08:18:04 +0200</i>
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Dear Sirs,<br>
<p>
I intend to use SANE for scanning in a linux network.<br>
<p>
Configuration and building of SANE was done according to the README file<br>
and<br>
proceeded without any errors. Kernel supports all kinds of SCSI devices.<br>
Using SANE with the Adaptec 1502E card succeeded after removing the link<br>
/dev/scanner and using /dev/sg0 instead. Former tries hang up after some<br>
activity at the scanner (without any debugging information displayed,<br>
even<br>
with SANE_DEBUG_LEVEL and SANE_DEBUG_MICROTEK increased to 128). Tryouts<br>
with an Adaptec 2940 controller on a 486/100MHz worked without problems<br>
(same SANE revision, same Linux kernel).<br>
Using the SANE daemon saned was possible, but hang up when scanning a 20<br>
MB<br>
image. I now use the rsh command, writing the image file to a NFS<br>
mounted<br>
directory.<br>
<p>
But after solving all other problems, I now have some color failure<br>
which<br>
depends on the coordinates of the scanned pixel (From right to left side<br>
of<br>
the scanned image the failure in the blue channel increases).<br>
Using the Microtek TWAIN driver under Windows showed no problems - the<br>
scanner itself seems to be okay. At this point I think I will need some<br>
additional help from you. If it provides better information, I could<br>
sent the image files of the scans under Windows and SANE to the<br>
developer,<br>
but they are too big to append to the mailing list.<br>
Below I list my system configuration and the log of a SANE scan:<br>
<p>
The SANE machine's configuration:<br>
<p>
SuSE Linux distribution 4.2<br>
Linux Kernel 2.0.0<br>
386/25MHz with 8 MB RAM and 100 MB harddisk (30 MB swapspace)<br>
(additional file space available on file server)<br>
Adaptec 1502E SCSI host<br>
Microtek Scanmaker E6<br>
SANE 0.73<br>
<p>
contents of /proc/scsi/scsi:<br>
<p>
Attached devices: <br>
Host: scsi0 Channel: 00 Id: 05 Lun: 00<br>
Vendor: MICROTEK Model: ScanMaker E6 Rev: 1.40<br>
Type: Scanner ANSI SCSI revision: 02<br>
<p>
The scan script:<br>
<p>
#!/bin/sh<br>
export SANE_DEBUG_LEVEL=128<br>
export SANE_DEBUG_MICROTEK=128<br>
scanimage -d microtek:/dev/sg0 --mode Color --resolution 300 -l 0 -t 0<br>
-x 178 -y 127 &gt; $1.pnm<br>
cjpeg -quality 100 $1.pnm &gt; $1.jpg ; rm -f $1.pnm<br>
<p>
(Remark: Both, the PNM and the JPEG file contain wrong colors, it is no<br>
problem<br>
of image file format conversion)<br>
<p>
With kindest regards - Christian Mueller<br>
<p>
<pre>
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