Beyond Linux® From Scratch (systemd edition) - Version 8.3

Chapter 10. Graphics and Font Libraries

opencv-3.4.2

Introduction to opencv

The opencv package contains graphics libraries mainly aimed at real-time computer vision.

This package is known to build and work properly using an LFS-8.3 platform.

Package Information

Additional Downloads

opencv Dependencies

Required

CMake-3.12.1 and UnZip-6.0

Recommended

FFmpeg-4.0.2, gst-plugins-base-1.14.2, GTK+-3.22.30, JasPer-2.0.14, libjpeg-turbo-2.0.0, libpng-1.6.35, LibTIFF-4.0.9, libwebp-1.0.0, v4l-utils-1.14.2, and xine-lib-1.2.9

Optional

apache-ant-1.10.4, Doxygen-1.8.14, Java-10.0.2, Python-2.7.15, Cuda, Eigen, OpenEXR, GCD, GDAL, GigEVisionSDK, JACK, libdc1394, libgphoto2, NumPy, OpenNI, PlanetUML, PvAPI, Threading Building Blocks (TBB), UniCap, VTK - The Visualization Toolkit, and XIMEA

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/opencv

Installation of opencv

If the optional Integrated Performance Primitives (IPP) package has been downloaded, put it in place so the cmake script does not try to download it again: 

ipp_file=ippicv_2017u3_lnx_intel64_general_20180518.tgz &&
ipp_hash=$(md5sum ../$ipp_file | cut -d" " -f1) &&
ipp_dir=.cache/ippicv                           &&

mkdir -p $ipp_dir &&
cp ../$ipp_file $ipp_dir/$ipp_hash-$ipp_file

If needed, unpack the additional modules package: 

tar xf ../opencv_contrib-3.4.2.tar.gz

Install opencv by running the following commands: 

sed -i 's/CV_RGB/cv::Scalar/' src/filter/facebl0r/facebl0r.cpp &&

mkdir build &&
cd    build &&

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  ..                     &&
make

The package does not come with an operable test suite.

Now, as the root user: 

make install             &&

case $(uname -m) in
  x86_64) ARCH=intel64 ;;
       *) ARCH=ia32    ;;
esac                     &&

cp -v 3rdparty/ippicv/ippicv_lnx/lib/$ARCH/libippicv.a /usr/lib &&
unset ARCH

Command Explanations

sed ... facebl0r.cpp: This command fixes a build problem with the current opencv dependency.

-DWITH_XINE=ON: This option instructs the make procedure to use xine-lib-1.2.9.

-DENABLE_PRECOMPILED_HEADERS=OFF: This option is needed for compatibiiity with gcc-6.1 and later.

-DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-3.4.2/modules: instructs the build system to build the additional modules.

cp -v 3rdparty/.../libippicv.a /usr/lib: This command installs a 3rdparty library.

Contents

Installed Programs: opencv_annotation, opencv_createsamples, and opencv_traincascade
Installed Libraries: libippicv.a, libopencv_calib3d.so, libopencv_core.so, libopencv_features2d.so, libopencv_flann.so, libopencv_highgui.so, libopencv_imgcodecs.so, libopencv_imgproc.so, libopencv_ml.so, libopencv_objdetect.so, libopencv_photo.so, libopencv_shape.so, libopencv_stitching.so, libopencv_superres.so, libopencv_ts.a, libopencv_video.so, libopencv_videoio.so, and libopencv_videostab.so
Installed Directories: /usr/include/opencv{,2} and /usr/share/OpenCV

Last updated on 2018-08-21 13:14:23 -0700