Utsushi - Next Generation Image Acquisition

  Copyright (C) 2012-2016  SEIKO EPSON CORPORATION
  Copyright (C) 2015  Olaf Meeuwissen


  SUMMARY
  =======
    This software provides applications to easily turn hard-copy
    documents and imagery into formats that are more amenable to
    computer processing.

    Included are a native driver for a number of EPSON scanners
    and a compatibility driver to interface with software built
    around the SANE standard.


  LICENSING
  =========
    This software is distributed under the terms of the GNU General
    Public License, version 3 or at your option any later version.
    A copy of this license can be found in the 'COPYING' file.


USING THE SOFTWARE
==================
  The software can be started from a command-line with the `utsushi`
  command.  This will automatically select a suitable application to
  control image acquisition and select the default device.  The GUI
  supports selecting a different device should you want to.

  In case you installed from a binary package, chances are that the
  binary package maintainer integrated the software in the desktop
  menu system.  If so, you can probably start up the GUI from there.

  In case you want to automate your image acquisition task, you can
  use a non-interactive utility for that.  Use the '--no-interface'
  option to prevent the automatic UI selection.

  For brief help information, use

    $ utsushi help

  and for help on the image acquisition applications

    $ utsushi help scan
    $ utsushi help scan --no-interface

  To see which devices are available, use

    $ utsushi list

  and use any of the displayed devices as an argument to the 'scan'
  command to select a particular device rather than whatever is the
  default.

  NETWORK SUPPORT
  ---------------
    Most, if not all, of the above devices can be used via a network
    connection.  If you want to do so with this software, install the
    non-free "networkscan" plugin.  This plugin is available via the
    EPSON Download Center[1].

    [1] http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX

  OPTICAL CHARACTER RECOGNITION (OCR) SUPPORT
  -------------------------------------------
    There is also a non-free OCR Engine that can be used to provide
    support for automatic document rotation.  The same functionality
    is available with a recent enough version of Tesseract (3.03 or
    later), however.

    The non-free OCR Engine can be found at the EPSON Download Center
    (see [1] above).

BUILDING/INSTALLING FROM SOURCE
===============================
  Generic installation notes can be found in the 'INSTALL' file.  The
  `./configure` script supports the following special options:

    --enable-code-coverage
    --enable-sane-config
    --enable-test-reports
    --enable-udev-config
    --with-gtkmm
    --with-included-boost
    --with-jpeg
    --with-magick
    --with-sane
    --with-tiff

  See the output of `./configure --help` for a complete list and more
  information.

  If you have a sufficiently recent Boost installed on your system but
  `./configure` fails to find any of its libraries, please specify the
  library directory with the `--with-boost-libdir` option.  Something
  like:

    $ ./configure --with-boost-libdir=/usr/lib/i386-linux-gnu

  ought to work.  This problem is most likely to manifest itself on a
  multiarch system.

  After you have `./configure`d the build to taste, all you need to do
  is just:

    $ make
    $ sudo make install

  The installation requires administrative privileges, hence the use
  of `sudo`.  Other means of obtaining the required privileges may be
  used as well.

  Before you install you may wish to make sure that the software will
  work as intended.  You can do this with:

    $ make check

  In case the check detects test failures please do as instructed in
  the output.

  REQUIRED SOFTWARE
  -----------------
    In order to be able to build all components and test (and do so in
    a variety of configurations) a large number of developer oriented
    software packages are needed.  If you start making changes in the
    build machinery (autoconf, automake and such), you need even more.
    To make getting all that software on your system a bit easier, the
    sources include a script to install all these packages for you.
    See `./install-deps --help` for details.


DEVELOPER NOTES
===============

  DIRECTORY STRUCTURE
  -------------------
    The build infrastructure relies on a number of 'upstream/' files
    courtesy of other software as well as 'include/' files to reduce
    code duplication in this package's Makefile.am files.

    In addition to an Utsushi "core", the source code contains a fair
    number of optional components.  The "core" consists of all files
    in the 'utsushi/', 'lib/' and 'src/' directories.  The optional
    components are grouped in subdirectories as follows:

     - connexions  various ways to communicate with hardware
     - drivers
       * dbus      for drivers running in a separate process [TODO]
       * esci      support for ESC/I protocol speaking scanners
       * mock      virtual scanners, useful for demonstration as well
                   as testing purposes [TODO]
       * sane      Utsushi API implemented using the SANE API [TODO]
                   enables use of SANE backends in Utsushi applications
     - filters     modify image data to taste
     - gtkmm       GUI toolkit for Utsushi applications using gtkmm
     - sane        a SANE backend implemented using the Utsushi API
                   enables use of Utsushi drivers in SANE frontends

    Test suites are kept apart from the code they test in respective
    'tests/' directories.

    API documentation can be found in the 'doc/' directory and can be
    updated with the 'html' and 'pdf' `make` targets.  Doing this at
    the top level source directory will recursively update all of the
    available API documentation.

  RUNNING DEVELOPMENT CODE
  ------------------------
    Most of the code can be run without the need to install.  Setting
    the 'srcdir' environment variable to the directory that holds the
    corresponding sources, normally the current directory, activates
    special handling of data and configuration file look-up so these
    will be taken from the source code tree.

    The gtkmm scan application, for example, can be run like so

      $ cd src
      $ srcdir=. ./scan-gtkmm

    You can also execute commands via the `main` program, like so

      $ cd src
      $ srcdir=. ./main list

    in case you want to see a list of available devices.  Execution
    via `main` is the intended mode of operation once the software is
    installed but may get in the way of debugging.

    Exercising the SANE utsushi backend is a little more involved as
    you have to make the SANE frontends go places where they normally
    don't.  For 'scanimage', the following ought to work

      $ cd sane
      $ echo utsushi > dll.conf
      $ srcdir=. SANE_CONFIG_DIR=. ../libtool --mode=execute \
          -dlopen libsane-utsushi.la scanimage -L