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NAME    [Toc]    [Back]

       sane-qcam - SANE backend for Connectix QuickCam cameras

DESCRIPTION    [Toc]    [Back]

       The sane-qcam library implements a SANE (Scanner Access Now Easy) backend
 that provides access Connectix QuickCam cameras.

DEVICE NAMES    [Toc]    [Back]

       This backend expects device names of the form:


       Where port is the I/O port address at which the device  resides.   This
       address	is  normally  specified  in  hexadecimal using C syntax (e.g.,
       0x37b) and may be prefixed with the letter "u" (e.g., u0x37b) to  force
       the backend to access the camera in uni-directional mode.

CONFIGURATION    [Toc]    [Back]

       The contents of the qcam.conf file is a list port addresses that may be
       connected to a Connectix QuickCam.  Empty lines and everything starting
       from  a	hash  mark  (#) up to the end of a line are ignored.  A sample
       configuration file is shown below:

	      0x37b  # /dev/lp0
	      0x378  # /dev/lp1
	      u0x278 # /dev/lp2 forced in uni-directional mode
	      0x3bc  # /dev/lp0 (alternate address)

       In general, it is safest to list only the port  addresses  that	really
       correspond  to a QuickCam.  For example, if one of the listed addresses
       actually connect to a printer, then starting up this backend will cause
       the printer to perform a device reset (which is generally undesirable).

FILES    [Toc]    [Back]

	      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).

ENVIRONMENT    [Toc]    [Back]

	      This environment variable specifies the list of directories that
	      may contain the configuration file.  Under UNIX, the directories
	      are separated by a colon (`:'), under OS/2, they	are  separated
	      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 /etc/sane.d.	If the
	      value of the environment variable ends with the directory  separator
 character, then the default directories are searched after
	      the explicitly  specified  directories.	For  example,  setting
	      SANE_CONFIG_DIR  to  "/tmp/config:"  would result in directories
	      "tmp/config", ".", and "/etc/sane.d"  being  searched  (in  this

       SANE_DEBUG_QCAM    [Toc]    [Back]
	      If  the  library	was  compiled with debug support enabled, this
	      environment 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.

AUTHOR    [Toc]    [Back]

       David Mosberger

BUGS    [Toc]    [Back]

       Support is currently limited to the color version of the QuickCam.  The
       black-and-white	camera is starting to work too, but I don't believe it
       works in all cases yet.	Reportedly, acquiring images of certain  sizes
       work  fine,  but others result in shifted images (sounds like a problem
       due to byte-padding).

       The program needs root-priviledges since it needs to be able to	access
       the camera's I/O ports.

SEE ALSO    [Toc]    [Back]


				25 October 1997 		  sane-qcam(5)
[ Back ]
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