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~> Sanity
device `pixma:04A9172F_164654' is a CANON Canon PIXMA MP620 multi-function peripheral
BMessage('sdvn') {
        device = string("pixma:04A9172F_164654", 22 bytes)
}
checking dev 0
BMessage('sdev') {
        device = (type = 'PNTR')(size = 8)
}
CMP: pixma:04A9172F_164654:pixma:04A9172F_164654
[Option # 2]
      name:  resolution
      title: Scan resolution
      desc:  Sets the resolution of the scanned image.
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_DPI(dpi)
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_WORD_LIST
       auto||75|150|300|600|1200dpi [75]
[Option # 3]
      name:  mode
      title: Scan mode
      desc:  Selects the scan mode (e.g., lineart, monochrome, or color).
      type:  SANE_TYPE_STRING
      unit:  SANE_UNIT_NONE
      size: 31
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_STRING_LIST
       auto|Color|Gray|Lineart [Color]
[Option # 4]
      name:  source
      title: Scan source
      desc:  Selects the scan source (such as a document-feeder). Set source before mode and resolution. Resets mode and resolution to auto values.
      type:  SANE_TYPE_STRING
      unit:  SANE_UNIT_NONE
      size: 31
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT 
      constraint: SANE_CONSTRAINT_STRING_LIST
       Flatbed [Flatbed]
[Option # 5]
      name:  button-controlled
      title: Button-controlled scan
      desc:  When enabled, scan process will not start immediately. To proceed, press "SCAN" button (for MP150) or "COLOR" button (for other models). To cancel, press "GRAY" button.
      type:  SANE_TYPE_BOOL
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT 
      constraint: SANE_CONSTRAINT_NONE
      [=(yes|no)] [no]
[Option # 7]
      name:  custom-gamma
      title: Use custom gamma table
      desc:  Determines whether a builtin or a custom gamma-table should be used.
      type:  SANE_TYPE_BOOL
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_NONE
      [=(auto|yes|no)] [yes]
[Option # 8]
      name:  gamma-table
      title: Image intensity
      desc:  Gamma-correction table.  In color mode this option equally affects the red, green, and blue channels simultaneously (i.e., it is an intensity gamma table).
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 16384
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..0,...
[Option # 9]
      name:  gamma
      title: Gamma function exponent
      desc:  Changes intensity of midtones
      type:  SANE_TYPE_FIXED
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0.299988..5 [2.2]
[Option # 11]
      name:  tl-x
      title: Top-left x
      desc:  Top-left x position of scan area.
      type:  SANE_TYPE_FIXED
      unit:  SANE_UNIT_MM(mm)
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..216.069mm [0]
[Option # 12]
      name:  tl-y
      title: Top-left y
      desc:  Top-left y position of scan area.
      type:  SANE_TYPE_FIXED
      unit:  SANE_UNIT_MM(mm)
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..297.011mm [0]
[Option # 13]
      name:  br-x
      title: Bottom-right x
      desc:  Bottom-right x position of scan area.
      type:  SANE_TYPE_FIXED
      unit:  SANE_UNIT_MM(mm)
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..216.069mm [216.069]
[Option # 14]
      name:  br-y
      title: Bottom-right y
      desc:  Bottom-right y position of scan area.
      type:  SANE_TYPE_FIXED
      unit:  SANE_UNIT_MM(mm)
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..297.011mm [297.011]
[Option # 16]
      name:  button-update
      title: Update button state
      desc:  Update button state
      type:  SANE_TYPE_BUTTON
      unit:  SANE_UNIT_NONE
      size: 0
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_ADVANCED 
      constraint: SANE_CONSTRAINT_NONE
      
[Option # 17]
      name:  button-1
      title: Button 1
      desc:  Button 1
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_DETECT SANE_CAP_ADVANCED 
      constraint: SANE_CONSTRAINT_NONE
       <int> [0]
[Option # 18]
      name:  button-2
      title: Button 2
      desc:  Button 2
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_DETECT SANE_CAP_ADVANCED 
      constraint: SANE_CONSTRAINT_NONE
       <int> [0]
[Option # 19]
      name:  original
      title: Type of original to scan
      desc:  Type of original to scan
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_DETECT SANE_CAP_ADVANCED 
      constraint: SANE_CONSTRAINT_NONE
       <int> [0]
[Option # 20]
      name:  target
      title: Target operation type
      desc:  Target operation type
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_DETECT SANE_CAP_ADVANCED 
      constraint: SANE_CONSTRAINT_NONE
       <int> [0]
[Option # 21]
      name:  scan-resolution
      title: Scan resolution
      desc:  Scan resolution
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_DETECT SANE_CAP_ADVANCED 
      constraint: SANE_CONSTRAINT_NONE
       <int> [0]
failed to set option --threshold to automatic (Invalid argument)
[Option # 23]
      name:  threshold
      title: Threshold
      desc:  Select minimum-brightness to get a white point
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_PERCENT(%)
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC SANE_CAP_INACTIVE 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..100% (in steps of 1) [inactive]
failed to set option --threshold-curve to automatic (Invalid argument)
[Option # 24]
      name:  threshold-curve
      title: Threshold curve
      desc:  Dynamic threshold curve, from light to dark, normally 50-65
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC SANE_CAP_INACTIVE 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..127 (in steps of 1) [inactive]
failed to set option --adf-wait to automatic (Invalid argument)
[Option # 25]
      name:  adf-wait
      title: ADF Waiting Time
      desc:  When set, the scanner searches the waiting time in seconds for a new document inserted into the automatic document feeder.
      type:  SANE_TYPE_INT
      unit:  SANE_UNIT_NONE
      size: 4
      caps: SANE_CAP_SOFT_SELECT SANE_CAP_SOFT_DETECT SANE_CAP_AUTOMATIC SANE_CAP_INACTIVE 
      constraint: SANE_CONSTRAINT_RANGE
       auto|0..3600 (in steps of 1) [inactive]
SANE_FRAME_RGB
sane_control_option(resolution, SET_VALUE, [150])...
sane_control_option(resolution, SET_VALUE): SANE_INFO_RELOAD_PARAMS
SANE_FRAME_RGB
SET_VALUE_MSG mode: auto value asked!
sane_control_option(mode, SET_VALUE): SANE_INFO_RELOAD_OPTIONS
sane_control_option(mode, SET_VALUE): SANE_INFO_RELOAD_PARAMS
SANE_FRAME_RGB
scanning image of size 1276x1754 pixels at 24 bits/pixel
SANE_FRAME_RGB