source: general/graphlib/opencv.xml@ 3f2db3a6

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY opencv-download-http     "https://github.com/opencv/opencv/archive/&opencv-version;/opencv-&opencv-version;.tar.gz">
  <!ENTITY opencv-download-ftp      " ">
  <!ENTITY opencv-md5sum            "2f52df67b255fcc2c36632a9e9f723f6">
  <!ENTITY opencv-size              "86 MB">
  <!ENTITY opencv-buildsize         "662 MB">
  <!ENTITY opencv-time              "3.4 SBU (using parallelism=4)">


  <!ENTITY opencv-contrib-download "https://github.com/opencv/opencv_contrib/archive/&opencv-version;/opencv_contrib-&opencv-contrib-version;.tar.gz">
]>

<sect1 id="opencv" xreflabel="opencv-&opencv-version;">
  <?dbhtml filename="opencv.html"?>


  <title>opencv-&opencv-version;</title>

  <indexterm zone="opencv">
    <primary sortas="a-opencv">opencv</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to opencv</title>

    <para>
      The <application>opencv</application> package contains graphics libraries
      mainly aimed at real-time computer vision.
    </para>

    &lfs112_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&opencv-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&opencv-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &opencv-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &opencv-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &opencv-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &opencv-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
<!--      <listitem>
        <para>
          Optional file (x86_64 only; will be downloaded when running cmake if not present):
          <ulink
          url="https://raw.githubusercontent.com/opencv/opencv_3rdparty/&ippicv_binaries_commit;/ippicv/&ippicv-version;.tgz"/>
        </para>
      </listitem>-->
      <listitem>
        <para>
          Optional additional modules: <ulink
          url="&opencv-contrib-download;"/>
        </para>
      </listitem>
    </itemizedlist>

    <note>
      <para>
        One additional file that starts with "ippicv" (integrated
        performance primitives) will be automatically downloaded during the
        cmake portion of the build procedure. This download is specific to the
        system architecture.
      </para>
    </note>

    <bridgehead renderas="sect3">opencv Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="cmake"/> and
      <xref linkend="unzip"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="ffmpeg"/>,
      <xref linkend="gst10-plugins-base"/>,
      <xref linkend="gtk3"/>,
      <xref linkend="jasper"/>,
      <xref linkend="libexif"/>,
      <xref linkend="libjpeg"/>,
      <xref linkend="libpng"/>,
      <xref linkend="libtiff"/>,
      <xref linkend="libwebp"/>,
      <xref linkend="v4l-utils"/>, and
      <xref linkend="xine-lib"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="apache-ant"/>,
      <xref linkend="doxygen"/>,
      <xref linkend="java"/>,
      <xref linkend="python2"/>,
      <ulink url="https://www.netlib.org/blas/">blas</ulink>,
      <ulink url="https://developer.nvidia.com/cuda-zone">Cuda</ulink>,
      <ulink url="https://eigen.tuxfamily.org/">Eigen</ulink>,
      <ulink url="https://www.openexr.com/">OpenEXR</ulink>,
      <!--<ulink url="http://gcd.joewheaton.org/">GCD</ulink>,-->
      <ulink url="https://www.gdal.org/">GDAL</ulink>,
      <!--<ulink url="https://www.jai.com/technology/interfaces">GigEVisionSDK</ulink>,-->
      <!--<ulink url="http://jackaudio.org/">JACK</ulink>,-->
      <ulink url="https://www.netlib.org/lapack/">lapack</ulink>,
      <ulink url="https://sourceforge.net/projects/libdc1394/">libdc1394</ulink>,
      <!--<ulink url="http://www.gphoto.org/">libgphoto2</ulink>,-->
      <ulink url="https://www.numpy.org/">NumPy</ulink>,
      <!--<ulink url="http://structure.io/openni">OpenNI</ulink>,
      <ulink url="http://plantuml.sourceforge.net/">PlanetUML</ulink>,
      <ulink url="https://www.alliedvision.com/en/support/software-downloads.html">PvAPI</ulink>,-->
      <ulink url="https://github.com/oneapi-src/oneTBB">Threading Building Blocks (TBB)</ulink>, and
      <!--<ulink url="http://unicap-imaging.org/">UniCap</ulink>,-->
      <ulink url="https://vtk.org/">VTK - The Visualization Toolkit</ulink>,
      <!--<ulink url="http://www.ximea.com/">XIMEA</ulink>-->
    </para>

    <para condition="html" role="usernotes">
      User Notes: <ulink url="&blfs-wiki;/opencv"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of opencv</title>

    <para>
      First, fix building this package with ffmpeg-5.1:
    </para>

<screen><userinput remap="pre">sed -e '/\/avformat.h/i #include &lt;libavcodec/version.h&gt;' \
    -i modules/videoio/src/ffmpeg_codecs.hpp</userinput></screen>

    <para>
      If needed, unpack the additional modules package:
    </para>

<screen><userinput>tar xf ../opencv_contrib-&opencv-contrib-version;.tar.gz</userinput></screen>

    <para>
      Install <application>opencv</application> by running the following
      commands:
    </para>

<screen><userinput>mkdir build &amp;&amp;
cd    build &amp;&amp;

cmake -DCMAKE_INSTALL_PREFIX=/usr      \
      -DCMAKE_BUILD_TYPE=Release       \
      -DENABLE_CXX11=ON                \
      -DBUILD_PERF_TESTS=OFF           \
      -DWITH_XINE=ON                   \
      -DBUILD_TESTS=OFF                \
      -DENABLE_PRECOMPILED_HEADERS=OFF \
      -DCMAKE_SKIP_RPATH=ON            \
      -DBUILD_WITH_DEBUG_INFO=OFF      \
      -Wno-dev  ..                     &amp;&amp;
make</userinput></screen>

    <para>
      The package does not come with an operable test suite.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>make install</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <parameter>-DWITH_XINE=ON</parameter>: This option instructs the make
      procedure to use <xref linkend="xine-lib"/>.
    </para>

    <para>
      <parameter>-DENABLE_PRECOMPILED_HEADERS=OFF</parameter>: This option
      is needed for compatibility with gcc-6.1 and later.
    </para>

    <para>
      <option>-DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-&opencv-version;/modules</option>:
      instructs the build system to build additional modules.
    </para>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          opencv_annotation,
          opencv_interactive-calibration,
          opencv_model_diagnostics,
          opencv_version,
          opencv_visualisation, and
          setup_vars_opencv4.sh
        </seg>
        <seg>
          libopencv_calib3d.so,
          libopencv_core.so,
          libopencv_dnn.so,
          libopencv_features2d.so,
          libopencv_flann.so,
          libopencv_gapi.so,
          libopencv_highgui.so,
          libopencv_imgcodecs.so,
          libopencv_imgproc.so,
          libopencv_ml.so,
          libopencv_objdetect.so,
          libopencv_photo.so,
          libopencv_stitching.so,
          libopencv_video.so, and
          libopencv_videoio.so
        </seg>
        <seg>
          /usr/include/opencv4,
          /usr/lib/cmake/opencv4,
          /usr/lib/python&python3-majorver;/site-packages/cv2,
          /usr/share/licenses/opencv4,
          /usr/share/opencv4, and
          /usr/share/java/opencv4
        </seg>
      </seglistitem>
    </segmentedlist>
<!--
    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="opencv_annotation">
        <term><command>opencv_annotation</command></term>
        <listitem>
          <para>
            ???
          </para>
          <indexterm zone="opencv opencv_annotation">
            <primary sortas="b-opencv">opencv_annotation</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>
-->
  </sect2>

</sect1>