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sane-hp(5)		 SANE Scanner Access Now Easy		    sane-hp(5)

       sane-hp - SANE backend for HP ScanJet scanners

       The sane-hp library implements a	SANE (Scanner Access Now Easy) backend
       that provides access to HP ScanJet scanners which support SCL  (Scanner
       Control	Language  by HP).  The following scanners are known positively
       to work with this backend:

	      Model:	     Product id:     Interface:
	      ----------     -----------     ----------
	      ScanJet Plus   C9195A	     HP	Parallel Interface Card
	      ScanJet IIc    C1750A 3226     SCSI
	      ScanJet IIcx   C2500A 3332     SCSI
	      ScanJet IIp    C1790A	     SCSI
	      ScanJet 3C     C2520A 3503     SCSI
	      ScanJet 3P     C2570A 3406     SCSI
	      ScanJet 4C     C2520A	     SCSI
	      ScanJet 4P     C1130A 3540     SCSI
	      ScanJet 4100C  C6290A	     USB
	      ScanJet 5P     C5110A	     SCSI
	      ScanJet 5100C  C5190A	     parallel port
	      ScanJet 5200C  C7190A 3846     parallel port/USB
	      ScanJet 6100C  C2520A 3644     SCSI
	      ScanJet 6200C  C6270A 3828     SCSI/USB
	      ScanJet 6250C  C6270A 3828     SCSI/USB
	      ScanJet 6300C  C7670A	     SCSI/USB
	      ScanJet 6350C  C7670A	     SCSI/USB
	      ScanJet 6390C  C7670A	     SCSI/USB
	      PhotoSmart     C5100A R029,R030,R032    SCSI

       Support for models 5100C/5200C connected	to the parallel	port  requires
       the  ppSCSI  driver  available  at
       scsi.html and

       Support for models 5200C/62X0C/63X0C connected to the USB  require  the
       kernel scanner driver or	libusb.	See sane-usb(5)	for more details.

       The sane-hp backend no longer supports OfficeJet	multi-function periph-
       erals.  For these devices use the external "hpoj"  backend  in  version
       0.90 and	later of the "HP OfficeJet Linux driver", available at

       Because	Hewlett-Packard	 does  no longer produce scanners that support
       SCL (beside the OfficeJets), the	above list of  supported  scanners  is
       complete.   Other HP scanners are not supported by the sane-hp backend,
       but     might	 be	supported     by     another	 one.	   See   You can also watch the sane-devel mail-
       ing list	at

       More details about  the	hp  backend  can  be  found  on	 its  homepage

       This backend expects device names of the	form:


       Where  special is the UNIX path-name for	the special device that	corre-
       sponds to the scanner.  For SCSI	scanners the special device name  must
       be  a  generic SCSI device or a symlink to such a device.  Under	Linux,
       such a device name could	be /dev/sga or /dev/sg2, for example.  If  the
       special device name contains "usb", "uscanner" or "ugen", it is assumed
       that the	scanner	is connected by	USB.  For the HP ScanJet Plus the spe-
       cial  device  name  must	be the device that corresponds to the parallel
       interface card that was shipped with the	scanner. That is  /dev/hpscan.
       A    special    driver	 is    required	   for	  this	  card.	   See for details. If the link does
       not work, try

       The  contents of	the hp.conf file is a list of options and device names
       that correspond to HP ScanJet scanners.	Empty lines and	lines starting
       with  a	hash mark (#) are ignored. See sane-scsi(5) and	sane-usb(5) on
       details of what constitutes a valid device name.

       Options specified in front of the first line  that  contains  a	device
       name  are defaults for all devices. Options specified below a line that
       contains	a device name apply just to the	most  recently	mentioned  de-

       Supported   options   are   connect-scsi,   connect-device,  enable-im-
       age-buffering, and dumb-read.

       Option connect-scsi specifies that the scanner is connected to the sys-
       tem  by	SCSI.	Input/output is	performed using	SCSI-commands. This is
       the default.  But if your SCSI device name contains  "usb",  "uscanner"
       or  "ugen",  option connect-scsi	must be	specified. Otherwise it	is as-
       sumed that the scanner is connected by USB.

       Option connect-device specifies that the	scanner	is  connected  to  the
       system	by   a	 special   device.   Input/output   is	 performed  by
       read()/write()-operations on the	device.	This option must be  used  for
       HP ScanJet Plus or scanners connected to	USB which are accessed through
       a named device (e.g.  /dev/usb/scanner0).  For device names  that  con-
       tain "usb", "uscanner" or "ugen", it is not necessary to	specify	option

       Option enable-image-buffering stores the	scanned	image in memory	before
       passing	it  to the frontend. Could be used in case of forward/backward
       moving scanner lamp.

       Option dumb-read	can be used to work around problems with "Error	during
       device I/O". These problems may occur with certain SCSI-to-USB convert-
       ers or Buslogic SCSI cards.  The	option should not be used for SCSI de-
       vices  which are	working	correctly.  Otherwise startup of frontends and
       changing	parameters might be slower.

       A sample	configuration file is shown below:

	      #	this is	a comment
	      option connect-device

       /dev/scanner is typically a symlink to the actual SCSI scanner device.

	      The  backend  configuration  file	 (see  also   description   of
	      SANE_CONFIG_DIR below).

	      The static library implementing this backend.

	      The shared library implementing this backend (present on systems
	      that support dynamic loading).

	      Calibration data for HP  PhotoSmart  PhotoScanner	 that  is  re-
	      trieved from the scanner after calibration. The data is uploaded
	      to the scanner at	start of the backend if	it is  in  media  mode
	      'print media' or if the media mode is changed to 'print media'.

	      This environment variable	specifies the list of directories that
	      may contain the configuration file.  On *NIX systems, the	direc-
	      tories are separated by a	colon (`:'), under OS/2, they are sep-
	      arated by	a semi-colon (`;').  If	this variable is not set,  the
	      configuration  file  is  searched	 in  two  default directories:
	      first, the current working directory (.)	and then  in  /usr/lo-
	      cal/etc/sane.d.	If  the	value of the environment variable ends
	      with the directory separator character, then the default	direc-
	      tories  are searched after the explicitly	specified directories.
	      For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
	      sult in directories tmp/config, ., and /usr/local/etc/sane.d be-
	      ing searched (in this order).

	      If the library was compiled with debug support enabled, this en-
	      vironment	 variable  controls  the debug level for this backend.
	      E.g., a value of 128 requests all	debug output  to  be  printed.
	      Smaller levels reduce verbosity.

	      Only  used  for  OS/2 and	along with use of HP PhotoSmart	Photo-
	      Scanner.	Must be	set to the directory where the directory .sane
	      is located.  Is used to save and read the	calibration file.



	      For  each	 type  of  connection (connect-scsi, connect-usb, con-
	      nect-device) it can be specified if the connection to the	device
	      should be	kept open ("1")	or not ("0").  Usually the connections
	      are closed after an operation is performed.  Keeping  connection
	      open  to SCSI-devices can	result in errors during	device IO when
	      the scanner has not been used for	some time.  By	default,  USB-
	      connections are kept open. Other connections are closed.

	      Specifies	 number	of retries for read operation before returning
	      an EOF error.  Only supported for	non-SCSI devices.  Default:  1
	      retry. Time between retries is 0.1 seconds.

       HP PhotoSmart PhotoScanner
	      In  media	 mode  'slide'	and  'negative',  scan resolutions are
	      rounded to multiple of 300 dpi. The scanner does not  scale  the
	      data correctly on	other resolutions. Some	newer models (firmware
	      code R030	and later) do not support adjustment  of  contrast/in-
	      tensity  level  and tone map.  The backend will simulate this by
	      software,	but only for gray and 24 bit color.

       Automatic Document Feeder (ADF)
	      For use of the ADF with xscanimage(1), first place paper in  the
	      ADF  and	then change option scan	source to 'ADF'. Press 'change
	      document'	to load	a sheet. Then press 'scan' to  start  a	 scan.
	      Maybe it is sufficient to	press 'scan' without 'change document'
	      for repeated scans. The use of the preview window	is not	recom-
	      mended when working with the ADF.	 Setting a window to scan from
	      ADF is not supported with	xscanimage(1).	Try xsane(1).

       Immediate actions
	      Some actions in xscanimage(1) (i.e. unload, select media,	 cali-
	      brate)  have an immediate	effect on the scanner without starting
	      a	scan.  These options can not be	used with scanimage(1).

       HP PhotoSmart PhotoScanner
	      PhotoScanners with firmware release R030 and up have no firmware
	      support  for  contrast/brightness/gamma  table.  In  the current
	      backend this is simulated	by software on 24 bits data.   Simula-
	      tion on 30 bits should give better results.

       Data widths greater than	8 bits
	      Custom gamma table does not work.

       Parallel	scanner	support
	      Beside  the ScanJet Plus which came with its own parallel	inter-
	      face card, currently only	the HP ScanJet	5100C/5200C  are  sup-
	      ported.	These  scanners	are using an internal parallel-to-SCSI
	      converter	which is supported by the ppSCSI-driver	(see above).

       sane(7),	sane-scsi(5), sane-usb(5) scanimage(1),	xscanimage(1), scanim-

       The sane-hp backend was written by Geoffrey T. Dairiki.
       HP PhotoSmart PhotoScanner support by Peter Kirchgessner.

				  13 Jul 2008			    sane-hp(5)


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