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 ?crit : > > 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 ?crit : > > > > 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 ?crit > : > > > > > > 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 .. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20110201/203bc08c/attachment.htm>
