Hi Guillaume, Please set me on CC when you respond to the mailing list. I missed your last emails.
If possible, please fetch the usb traffic on a Windows machine for a tpu scan. Then we can investigate the correct settings for the scan parameters command. On the other hand it seems that your scanner has problems with image post processing @ higher resolutions. Please scan a small detail of an image for all resolutions and save them as pnm/png or tiff files. Please send the files directly to me, the mailig list doesn't accept large emails. Cheers, Rolf Am 11.11.2014 um 18:32 schrieb Guillaume Courtois: > > Hi, > > Progress here ! It turns out MP990 needs Data[0x25]=0x01 like some > other scanners. > Sadly, I now have a color problem, white is greenish. Is that a gamma > table problem ? > > Bye. > > Le 09/11/2014 21:12, Guillaume Courtois a écrit : >> Hi, >> >> Worked a few hours again on the problem. It seems like I don't get the >> correct datas from the scanner (or it's being badly post-processed) >> when I'm using bigger resolutions than 300 dpi with TPU unit. Flatbed >> seems all ok. >> >> 300 dpi scans do not give me underruns, but all the others do, and >> with bigger and bigger values. The resulting pictures are bigger and >> bigger in size, but the image inside them is worse : it seems like the >> bigger the resolution I choose, the less I get actual lines of datas. >> >> Again, if you have any ideas, that would be cool. I can provide datas, >> logs, whatever you want. >> >> Thanks guys. >> >> Bye. >> >> Le 02/11/2014 16:47, Guillaume Courtois a écrit : >>> Hi Rolf, >>> >>> I've just seen I sent my first response to you but not the list, sorry >>> about that (but it contained nothing interesting in fact). >>> >>> I made some progress today, color shifting seem ok and I don't have >>> the white columns anymore. >>> I'll have to give a clean patch to the list for that, but first I have >>> to solve my last problem, which is underrun. >>> >>> I tried to find the source of that problem but with no luck until now. >>> It seem to happen only with TPU unit, strange ? >>> >>> Here is the result at 1200 dpi : >>> >>> pixma] **mp810_fill_buffer***** end of image ***** >>> [pixma] WARNING:image size mismatches >>> [pixma] 859431936 expected (14032 lines) but 222452736 received >>> (3632 lines) >>> [pixma] pixma_read_image(): completed (underrun detected) >>> >>> (in debug : >>> [pixma] *mp810_fill_buffer***** moving 504704 bytes into buffer ***** >>> [pixma] *mp810_fill_buffer***** 507904 bytes received by >>> read_image_block ***** >>> ) >>> >>> and at 600 dpi : >>> >>> [pixma] **mp810_fill_buffer***** end of image ***** >>> [pixma] WARNING:image size mismatches >>> [pixma] 214857984 expected (7016 lines) but 111226368 received >>> (3632 lines) >>> [pixma] pixma_read_image(): completed (underrun detected) >>> >>> (in debug : >>> [pixma] *mp810_fill_buffer***** moving 260096 bytes into buffer ***** >>> [pixma] *mp810_fill_buffer***** 245760 bytes received by >>> read_image_block ***** >>> ) >>> >>> Buffer size seem to be twice the size when raising the resolution. >>> Shouldn't it be 4 times bigger ? >>> >>> I hope you have an idea here because my head is exploding... >>> >>> Thanks ! >>> >>> Bye. >>> >>> Le 27/10/2014 16:57, Rolf Bensch a écrit : >>>> Hi Guillaume, >>>> >>>> If you want to dig into the source code, you can look here: >>>> >>>> file: pixma_mp810.c >>>> function: post_process_image_data() >>>> >>>> It's possible that post processing image data is broken. Please check >>>> these git commits: >>>> b4bb0062c5cbb77c895b439b5f47e70b506305b1 (2013-01-11 16:37:00) and >>>> 1da5bcc2aa16a6382e5bd78a47cb3ec222a9aafc (2012-01-15 03:48:19) >>>> >>>> Many thanks for your help. >>>> >>>> Cheers, >>>> Rolf >>>> >>>> >>>> Am 19.10.2014 um 15:20 schrieb Guillaume Courtois: >>>>> >>>>> Hi guys, >>>>> >>>>> I'm currently trying to make the TPU correctly work on my MP990 >>>>> scanner. It seems like there are shifting problems both in datas and >>>>> in the 3 colors (which seem to be 2 separate issues, but not sure). >>>>> >>>>> I'm currently testing on my debian SID with sane GIT version, but I >>>>> have tested packages from SID and made tests on a Mint 17 netbook >>>>> also. All seem to give the same results. >>>>> >>>>> It seems like datas are not shifted in 300 dpi but are more and more >>>>> shifted when you choose higher resolutions (600, 1200, 2400 dpi). >>>>> >>>>> I'm happy to provide pictures if you want to see what it gives, but >>>>> that gives vertical black stripes on the captured picture. >>>>> >>>>> Here is the output of xscanimage with some debug activated : >>>>> >>>>> Here is the 300 dpi correct scan : >>>>> >>>>> [pixma] pixma_scan(): start >>>>> [pixma] line_size=3378 image_size=9674592 channels=3 depth=16 >>>>> [pixma] Reader task id=140539733346048 (threaded) >>>>> [pixma] dpi=300x300 offset=(780,88) dimension=563x2864 >>>>> [pixma] gamma_table=0xd939e0 source=2 >>>>> [pixma] threshold=127 threshold_curve=0 >>>>> [pixma] ADF page count: 0 >>>>> [pixma] Setting non-blocking mode >>>>> [pixma] Current status: paper=0 cal=0 lamp=2 busy=0 >>>>> [pixma] Current status: paper=0 cal=0 lamp=2 busy=0 >>>>> [pixma] Current status: paper=0 cal=0 lamp=2 busy=0 >>>>> [pixma] Lamp status: 3 , timeout in: 19 >>>>> [pixma] pixma_read_image():completed >>>>> [pixma] Reader task terminated >>>>> [pixma] Reader task started >>>>> [pixma] Reader task id=140539733346048 (threaded) >>>>> >>>>> Here is the not-so-correct 1200 dpi scan : >>>>> >>>>> [pixma] pixma_scan(): start >>>>> [pixma] line_size=13938 image_size=67376292 channels=3 depth=16 >>>>> [pixma] dpi=1200x1200 offset=(282,446) dimension=2323x4834 >>>>> [pixma] gamma_table=0xd939e0 source=2 >>>>> [pixma] threshold=127 threshold_curve=0 >>>>> [pixma] ADF page count: 0 >>>>> [pixma] Setting non-blocking mode >>>>> [pixma] Current status: paper=0 cal=0 lamp=2 busy=0 >>>>> [pixma] Current status: paper=0 cal=0 lamp=2 busy=0 >>>>> [pixma] Current status: paper=0 cal=0 lamp=2 busy=0 >>>>> [pixma] Lamp status: 3 , timeout in: 19 >>>>> [pixma] WARNING:image size mismatches >>>>> [pixma] 67376292 expected (4834 lines) but 44044080 received >>>>> (3160 >>>>> lines) >>>>> [pixma] pixma_read_image(): completed (underrun detected) >>>>> >>>>> As you can see, mismatch and underrun tells me I have to dig >>>>> around that. >>>>> >>>>> Also, it seems like data coming from the preview window is >>>>> mis-interpreted : I have to pick a smaller and decaled window in >>>>> order >>>>> to get the actual correct part of the scan I want to have (I don't >>>>> know if I'm pretty clear on that one ?). >>>>> >>>>> I'm still digging into the code to see if I can correct that but if >>>>> you guys could point me to the right direction, that would save me >>>>> lots of time. >>>>> >>>>> Thanks for your attention, keep up the nice work on sane ! >>>>> >>>>> Bye. >>>>> >>>>> > > -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
