# Re: The problem of xscanimage by CanoscanFB620S

From: Lawrence Glaister (lg@jfm.bc.ca)
Date: Wed Oct 04 2000 - 11:15:03 PDT

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  The bytesperline looks ok if you are doing a color scan of 637 pixels/line
  637*3 = 1911 bytes. There is one byte each for red/green/blue pixel data.
  I'm not sure what your other problem could be. Can you scan at any
  resolution successfully? How about greyscale scans?
  =======================================================
  Lawrence Glaister VE7IT email: lg@jfm.bc.ca
  1462 Madrona Drive http://jfm.bc.ca
  Nanoose Bay BC Canada
  V9P 9C9
  =======================================================
  ----- Original Message -----
  From: Mitsuru　Okaniwa <m-okaniwa@bea.hi-ho.ne.jp>
  To: sane-devel mailing list <sane-devel@mostang.com>
  Sent: Tuesday, October 03, 2000 9:13 PM
  Subject: The problem of xscanimage by CanoscanFB620S

  > Hi,
  > I'm trying to work xscanimage by CanoscanFB620S properly.
  > The problem of xscanimage by CanoscanFB620S is that
  > the scanimage made by FB620S is not a normal image.
  > The image is the diagonal stripes against black.
  > I tried to look up the debug-file and I thought that the cause of
  > the diagonal stripes scanimage was a difference between
  > number of 'bytes_per_line' and number of bytes of
  > 'sanei_scsi_req_wait'. I think the number of 'bytes_per_line' must be
  equal
  > to the number of bytes of 'sanei_scsi_req_wait'.
  > Is my thought wrong?
  > Would anybody teach me the part of sane program which I change
  > to fix the difference of 'bytes_per_line' and 'sanei_scsi_req_wait'
  > if my thought is not wrong.
  > Would anybody teach me the way of fix the difference.
  >
  > The problem parts of the debug-file are as follows.
  > ---------------------------------------------------------
  > [canon] sane_get_parameters: xres='75', yres='75', pixels_per_line='637',
  > bytes_per_line='1911', <==== Look at this number !
  > lines='876'
  > [canon] << sane_get_parameters
  > [dll] set_io_mode(handle=0x8099990,nonblocking=1)
  > [canon] >> sane_set_io_mode
  > [canon] << sane_set_io_mode
  > [dll] read(handle=0x8099990,data=0xbfffcc1c,maxlen=8192,lenp=0xbfffcc18)
  > [canon] >> sane_read
  > [canon] >> read_data
  > [sanei_scsi] scsi_req_enter: entered 0x8080e28
  > [sanei_scsi] sanei_scsi_req_wait: waiting for 0x8080e28
  > [sanei_scsi] sanei_scsi.issue: 0x8080e28
  > [sanei_scsi] sanei_scsi_req_wait: read 8228 bytes <==== Look at this
  number
  > !
  > [canon] << read_data
  > [canon] << sane_read
  > [dll] read(handle=0x8099990,data=0xbfffcc1c,maxlen=8192,lenp=0xbfffcc18)
  >
  > regards,
  >
  > -----------------------------
  > Mitsuru Okaniwa
  > email : m-okaniwa@bea.hi-ho.ne.jp
  > tel : (Japan)0566-26-6105
  > -----------------------------
  >
  >
  > --
  > Source code, list archive, and docs: http://www.mostang.com/sane/
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  >

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  - Next message: Nick Lamb: "12bit (was Re: Patch for sane.tex (image polarity))"
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  - In reply to: Mitsuru　Okaniw: "The problem of xscanimage by CanoscanFB620S"
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