[sane-devel] A couple issues with genesys HP G4010
Brian Shaver
shakerlxxv at gmail.com
Wed Feb 2 02:16:23 UTC 2011
On Mon, Jan 31, 2011 at 11:30 PM, stef <stef.dev at free.fr> wrote:
> Le Monday 31 January 2011 23:53:52 Brian Shaver, vous avez écrit :
> > On Mon, Jan 31, 2011 at 4:07 PM, stef <stef.dev at free.fr> wrote:
> > > Le Sunday 30 January 2011 19:46:00 Brian Shaver, vous avez écrit :
> > > > Thanks Stef!
> > > >
> > > > Let me know if you'd like any additional information, or if I can be
> > > > any help with the fix.
> > > >
> > > > Thanks,
> > > > Brian ..
> > > >
> > > > On Sun, Jan 30, 2011 at 2:36 AM, stef <stef.dev at free.fr> wrote:
> > > > > Le Saturday 29 January 2011 21:26:03 Brian Shaver, vous avez écrit
> :
> > > > > > allan,
> > > > > > If I comment out the function call which was causing the crash,
> > > > > > then I'm able to run with a high genesys debug level. This
> > > > > > function call was just for debug purposes to create the
> > > > > > "unprocessed.pnm" file. The following commands were executed
> with:
> > > > > >
> > > > > > SANE_DEBUG_GENESYS=255
> > > > > > SANE_DEBUG_SANEI_MAGIC=255
> > > > > >
> > > > > > ./scanimage --mode Lineart --resolution 100 -l 21.4 -t 79.7 -x
> > > > > > 148.7
> > >
> > > -y
> > >
> > > > > > 138.9 --swdespeck=yes > /tmp/despeck.pnm 2> /tmp/despeck.log
> > > > > >
> > > > > > ./scanimage --mode Lineart --resolution 100 -l 21.4 -t 79.7 -x
> > > > > > 148.7
> > >
> > > -y
> > >
> > > > > > 138.9 > /tmp/no_despeck.pnm 2> /tmp/no_despeck.log
> > > > > >
> > > > > > Attached are the images and log files. The black band at the
> bottom
> > >
> > > of
> > >
> > > > > the
> > > > >
> > > > > > despeck image does not change size based on the despeck value.
> > > > > >
> > > > > > Thanks,
> > > > > > Brian ..
> > > > > >
> > > > > > On Sat, Jan 29, 2011 at 11:30 AM, m. allan noah
> > > > > > <kitno455 at gmail.com>
> > > > >
> > > > > wrote:
> > > > > > > brian- I did not write the genesys backend, but I did write the
> > > > > > > sanei_magic library that it uses to provide the swdespeck
> option.
> > >
> > > It
> > >
> > > > > > > would be interesting to see a low resolution version of the two
> > > > > > > images, and a log with:
> > > > > > >
> > > > > > > SANE_DEBUG_SANEI_MAGIC=255
> > > > > > >
> > > > > > > combined with whatever the highest debug level genesys will
> give
> > > > > > > without crashing.
> > > > > > >
> > > > > > > allan
> > > > > > >
> > > > > > > On Fri, Jan 28, 2011 at 8:19 AM, Brian Shaver <
> > >
> > > shakerlxxv at gmail.com>
> > >
> > > > > > > wrote:
> > > > > > > > I'm using the Lineart mode and trying the --swdespeck option
> > > > > > > > and I've noticed its leaving a black band along the bottom of
> > > > > > > > the image. The 2nd issue, is that when I turn the debug up (
> > > > >
> > > > > SANE_DEBUG_GENESYS=10
> > > > >
> > > > > > > > ) and try the same scan, the process seg faults. The
> following
> > > > > > > > is the stack from the core:
> > > > > > > > (gdb) bt
> > > > > > > > #0 0x00007fa3e4ce35c8 in sanei_genesys_write_pnm_file
> > > > > > > > (filename=0x7fa3e4cec479 "unprocessed.pnm",
> > > > > > > >
> > > > > > > > data=0x7fa3e2267000 <Address 0x7fa3e2267000 out of
> bounds>,
> > > > > > > > depth=1,
> > > > > > > >
> > > > > > > > channels=1, pixels_per_line=2360, lines=3188)
> > > > > > > >
> > > > > > > > at genesys_low.c:144
> > > > > > > >
> > > > > > > > #1 0x00007fa3e4caa60f in genesys_buffer_image (s=0x99e340)
> at
> > > > > > > > genesys.c:6895
> > > > > > > > #2 0x00007fa3e4caccab in sane_genesys_start
> (handle=0x99e340)
> > > > > > > > at genesys.c:7864
> > > > > > > > #3 0x00007fa3eae33ae2 in sane_dll_start (handle=0x99b2a0) at
> > > > > > > > dll.c:1263 #4 0x00007fa3eae20d38 in sane_start (h=0x99b2a0)
> at
> > > > > > > > dll-s.c:48 #5 0x0000000000406d1c in main (argc=13,
> > > > > > > > argv=0x7fffe2b73a08) at scanimage.c:2283
> > > > > > > >
> > > > > > > > The code is trying to write out a file ( unprocessed.pnm )
> > > > >
> > > > > containing
> > > > >
> > > > > > > ... I
> > > > > > >
> > > > > > > > think the Lineart converted data before performing the
> despeck
> > > > >
> > > > > process.
> > > > >
> > > > > > > > I'd be happy to help with a fix for this, or provide further
> > > > > > > > information
> > > > > > >
> > > > > > > or
> > > > > > >
> > > > > > > > testing.
> > > > > > > > Thanks,
> > > > > > > > Brian ..
> > > > > > > > --
> > > > > > > > sane-devel mailing list: sane-devel at lists.alioth.debian.org
> > > > > > > > http://lists.alioth.debian.org/mailman/listinfo/sane-devel
> > > > > > > > Unsubscribe: Send mail with subject "unsubscribe
> your_password"
> > > > > > > >
> > > > > > > > to sane-devel-request at lists.alioth.debian.org
> > > > > > >
> > > > > > > --
> > > > > > > "The truth is an offense, but not a sin"
> > > > > > >
> > > > > Hello,
> > > > >
> > > > > thanks for providing these detailed information. For the
> > > > > crash, the
> > > > >
> > > > > image
> > > > > writing function doesn't handle line art bitmap format. I'm
> currently
> > > > > fixing
> > > > > that. For the black band, it is due to incorrect settings in
> > > > > registers
> > >
> > > in
> > >
> > > > > line
> > > > > art mode which makes the backend reading too much data from the
> > >
> > > scanner.
> > >
> > > > > This
> > > > > extra data is filled with 'noise'. I am currently looking into
> that.
> > > > >
> > > > > Regards,
> > > > >
> > > > > Stef
> > >
> > > Hello,
> > >
> > > I have committed the fix for this bug. Now image size will be
> > >
> > > correct.
> > > The logging issue is also fixed. You may try the latest git source
> code.
> > >
> > > Regards,
> > >
> > > Stef
> >
> > Stef,
> > When I test with these latest changes, they do address the issues
> > referenced in this thread; however, I'm seeing an increase in the noise
> in
> > the image. Just to make sure I rolled back a couple days and re-scanned
> > the same images again. The additional noise is present both with and
> > without the swdespeck option. I'm attaching sample images. Any ideas?
> >
> > Thanks,
> > Brian ..
>
> Hello,
>
> there is no calibration nor warmup done for the G4010/G4050. So the
> kind
> of issue you're having isn't surprising. Once I have finished to add
> 2400/4800
> dpi modes for the Lide 100/200, I'll turn back to the G4040.
>
> Regards,
> Stef
>
Stef / allan,
Not sure I completely understand either of your responses, but another test
I just ran ( with a different image ) did not have any problem. So that's
good news.
Stef, one thing I really like about the current SANE interface to the HP
G4010 is how quickly I can scan multiple pages as long as I'm not changing
anything (even changing some parameters doesn't cause any delay ). It sounds
like this could be related to the calibration / warmup functions not yet
implemented. I hope the speed wouldn't change too much when these functions
are implemented, or perhaps there could be an option to avoid the
calibration/warmup steps?
Thanks,
Brian ..
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