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This article mainly introduces how to compile and install opencv in Ubuntu17.04 system, which is very detailed and has certain reference value. Friends who are interested must finish reading it.

Install the gcc cmake compilation environment

Sudo apt-get install build-essential pkg-config cmake cmake-gui

This article provides two ways of compiling source code, one is cmake command, and the other is compiled through cmake-gui of graphical interface.

This version of system ubuntu already comes with python 2.7and python 3.5.It is necessary to install pip to manage the python package.

Sudo apt-get install python-pipsudo apt-get install python3-pip

Configure the download and update speed of pip Tsinghua Source acceleration package (looking for the feeling of flying)

Mkdir ~ / .pipvim ~ / .pip / pip.conf# add the following to pip.conf [global] index-url = https://pypi.tuna.tsinghua.edu.cn/simple[install]trusted-host=mirrors.aliyun.com

Install the data analysis package under python and python3

Pip install numpy scipy matplotlib scikit-image scikit-learn pip3 install numpy scipy matplotlib scikit-image scikit-learn

Install other dependencies

# git: version control # gfortran fortran compiler # yasm assembly compiler # ffmpeg system comes with sudo apt-get install checkinstall yasm gfortran git ffmpegsudo apt-get install libxvidcore4 libgtk-3-devsudo apt-get install libjpeg8-dev libjasper-dev sudo apt-get install libtiff5-devsudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-devsudo apt-get install libxine2-dev libv4l-devsudo apt-get install libqt4-dev libgtk2.0-dev libtbb-devsudo apt-get install libatlas-base-devsudo apt-get Install libfaac-dev libmp3lame-dev libtheora-devsudo apt-get install libvorbis-dev libxvidcore-devsudo apt-get install libopencore-amrnb-dev libopencore-amrwb-devsudo apt-get install x264 v4l-utils

4. Optional dependence

Sudo apt-get install libprotobuf-dev protobuf-compilersudo apt-get install libgoogle-glog-dev libgflags-devsudo apt-get install libgphoto2-dev libeigen3-dev libhdf5-dev doxygen

Download and install OpenCV3

Install git

Sudo apt-get install git

Download OpenCV3

Git clone https://github.com/opencv/opencv.git

Download OpenCV_Contrib

Git clone https://github.com/opencv/opencv_contrib.git

OpenCV has separated part of the content (such as SIFT, etc.) into opencv_contrib since 3. 0. Therefore, to fully install OpenCV, you also need to install opencv_contrib.

Command compilation

Cd opencvmkdir buildcd buildcmake-D CMAKE_BUILD_TYPE=RELEASE\-D CMAKE_INSTALL_PREFIX=/usr/local\-D INSTALL_PYTHON_EXAMPLES=ON\-D WITH_TBB=ON\-D WITH_V4L=ON\-D WITH_QT=ON\-D WITH_OPENGL=ON\-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules\-D BUILD_EXAMPLES=ON. # check the number of cpu cores nproc# if you have 8 cores # switch to the build directory Execute the following command, compile the source code and link to generate the corresponding dynamic library and the executable file make-job. after the execution is complete, execute the following command to install the generated executable and the dynamic library into the specified installation directory. Sudo make installsudo sh-c 'echo "/ usr/local/lib" > > / etc/ld.so.conf.d/opencv.conf'sudo ldconfig

Using graphical tools to configure and generate makefile

Change to the opencv directory and create a new directory to hold the configuration files generated by cmake.

Mkdir build

Cd build

Find cmake-gui in your graphical interface software to open it.

Then add the directory path of opencv to Where is the source code and the build directory you just created in where to build the binaries

Then click Configure below, select Unix Makefiles, and then select default. Click OK to process the CMakeLists.txt in the opencv directory. And generate CMakeCache.txt and Makefile and other related files in the Build directory.

After the Configure configuration is finished, a configuration interface similar to the following appears

Here are the parts that need to be modified

Change CMAKE_BUILD_TYPE to RELEASE

OPENCV_EXTRA_MODULES_PATH is set to the path to the modules directory in opencv_contrib (for example, / home/arvin/opencv_contrib/modules)

Tick the check box in BUILD_EXAMPLES

Tick the check box in INSTALL_C_EXAMPLES

Tick the check box in INSTALL_PYTHON_EXAMPLES

Tick the check box in WITH_FFMPEG

Tick the check box in WITH_GTK

Tick the check box in WITH_V4L

Tick the check box in WITH_TIFF

Tick the check box in WITH_PNG

Tick the check box in WITH_JPEG

Tick the check box in WITH_JASPER

Uncheck the check box in WITH_CUDA

Uncheck the check box in WITH_CUFFT

Then click Configure, apply the previous changes and update the changes to CMakeCache.txt in the build directory. Then click Generate to update Makefile.

Outsource the installation of OpenCV3 and OpenCV3

Cd opencv/build/make-j8sudo make install sudo ldconfig

Test whether the environment is configured successfully

# Open your python interpreter on the command line and enter the following command. If import cv2 print cv2.__version__# sees output similar to the following, it means that the configuration is successful. The above is all the contents of the article "how to compile and install opencv in the Ubuntu17.04 system". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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