opencv3在Ubuntu16.04上的安装

在视觉slam十四讲的过程中，opencv库的安装遇到了问题，于是在网上找了一些博客，最后终于解决，整个过程参考的是下面的网页。

https://www.learnopencv.com/install-opencv3-on-ubuntu/

Step 1: Update packages

sudo apt-get update
sudo apt-get upgrade

 

Step 2: Install OS libraries

Remove any previous installations of x264</h3>

sudo apt-get remove x264 libx264-dev

We will Install dependencies now

sudo apt-get install build-essential checkinstall cmake pkg-config yasm
sudo apt-get install git gfortran
sudo apt-get install libjpeg8-dev libjasper-dev libpng12-dev

# If you are using Ubuntu 14.04

sudo apt-get install libtiff4-dev

# If you are using Ubuntu 16.04

sudo apt-get install libtiff5-dev

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev
sudo apt-get install libxine2-dev libv4l-dev
sudo apt-get install libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev
sudo apt-get install qt5-default libgtk2.0-dev libtbb-dev
sudo apt-get install libatlas-base-dev
sudo apt-get install libfaac-dev libmp3lame-dev libtheora-dev
sudo apt-get install libvorbis-dev libxvidcore-dev
sudo apt-get install libopencore-amrnb-dev libopencore-amrwb-dev
sudo apt-get install x264 v4l-utils

Step 3: Install Python libraries

sudo apt-get install python-dev python-pip python3-dev python3-pip
sudo -H pip2 install -U pip numpy
sudo -H pip3 install -U pip numpy

We will use Virtual Environment to install Python libraries. It is generally a good practice in order to separate your project environment and global environment.

# Install virtual environment

sudo pip2 install virtualenv virtualenvwrapper
sudo pip3 install virtualenv virtualenvwrapper
echo "# Virtual Environment Wrapper"  >> ~/.bashrc
echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc
source ~/.bashrc

############ For Python 2 ############

# create virtual environment

mkvirtualenv facecourse-py2 -p python2
workon facecourse-py2

# now install python libraries within this virtual environment

pip install numpy scipy matplotlib scikit-image scikit-learn ipython

# quit virtual environment

deactivate

######################################

############ For Python 3 ############

# create virtual environment

mkvirtualenv facecourse-py3 -p python3

workon facecourse-py3

  

# now install python libraries within this virtual environment

pip install numpy scipy matplotlib scikit-image scikit-learn ipython

  

# quit virtual environment

deactivate

######################################

Step 4: Download OpenCV and OpenCV_contrib

We will download opencv and opencv_contrib packages from their GitHub repositories.

Step 4.1: Download opencv from Github

git clone https://github.com/opencv/opencv.git
cd opencv 
git checkout 3.3.1 
cd ..

Step 4.2: Download opencv_contrib from Github

git clone https://github.com/opencv/opencv_contrib.git
cd opencv_contrib
git checkout 3.3.1
cd ..

Step 5: Compile and install OpenCV with contrib modules

Step 5.1: Create a build directory

cd opencv
mkdir build
cd build

Step 5.2: Run CMake

cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=/usr/local \
      -D INSTALL_C_EXAMPLES=ON \
      -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 ..

Step 5.3: Compile and Install

# find out number of CPU cores in your machine

nproc

# substitute 4 by output of nproc

make -j4

sudo make install

sudo sh -c 'echo "/usr/local/lib" >> /etc/ld.so.conf.d/opencv.conf'

sudo ldconfig

欢迎slam的小伙伴大家多多交流哈！