Linux Manual Pages

Free Software * Books

Source Code

Free Media

Linux

sane-qcam(5)

NAME

   sane-qcam - SANE backend for Connectix QuickCam cameras

DESCRIPTION

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

DEVICE NAMES

   This backend expects device names of the form:

          port

   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

   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

   /etc/sane.d/qcam.conf
          The   backend   configuration  file  (see  also  description  of
          SANE_CONFIG_DIR below).

   /usr/lib/arch_triplet/sane/libsane-qcam.a
          The static library implementing this backend.

   /usr/lib/arch_triplet/sane/libsane-qcam.so
          The shared library implementing this backend (present on systems
          that support dynamic loading).

ENVIRONMENT

   SANE_CONFIG_DIR
          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 order).

   SANE_DEBUG_QCAM
          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

   David Mosberger

BUGS

   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-privileges since it needs to be able to access
   the camera's I/O ports.

Opportunity

Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.

Education

Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.