Ubuntu 18.04 LTS下安装OpenCv最新版本通过GitHub

第一步：更新你的Ubuntu

$ sudo apt-get update

$ sudo apt-get upgrade

这一没有过多的说明

第二步：下载依赖的包

$ sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev

$ sudo apt-get install python3.5-dev python3-numpy libtbb2 libtbb-dev

$ sudo apt-get install libjpeg-dev libpng-dev libtiff5-dev libjasper-dev libdc1394-22-dev libeigen3-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev sphinx-common libtbb-dev yasm libfaac-dev libopencore-amrnb-dev libopencore-amrwb-dev libopenexr-dev libgstreamer-plugins-base1.0-dev libavutil-dev libavfilter-dev libavresample-dev

这里有必要说明一点，笔者在安装时有一个包libjasper-dev安装失败，解决办法如下：

$ sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
$ sudo apt-get update
$ sudo apt-get install libjasper1 libjasper-dev

第三步：获取OpenCV

$ sudo -s

$ cd /opt

/opt$ git clone https://github.com/Itseez/opencv.git

/opt$ git clone https://github.com/Itseez/opencv_contrib.git

第四步：构建并下载OpenCV

/opt$ cd opencv

/opt/opencv$ mkdir release

/opt/opencv$ cd release

/opt/opencv/release$ cmake -D BUILD_TIFF=ON -D WITH_CUDA=OFF -D ENABLE_AVX=OFF -D WITH_OPENGL=OFF -D WITH_OPENCL=OFF -D WITH_IPP=OFF -D WITH_TBB=ON -D BUILD_TBB=ON -D WITH_EIGEN=OFF -D WITH_V4L=OFF -D WITH_VTK=OFF -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/opt/opencv_contrib/modules /opt/opencv/

/opt/opencv/release$ make -j4

/opt/opencv/release$ make install

/opt/opencv/release$ ldconfig 

/opt/opencv/release$ exit

/opt/opencv/release$ cd ~

该处使用的是CMakemake -j4 中的4是线程数，你也可以是更大的数字

ldconfig 动态链接库的管理命令

查看你的版本：

$ pkg-config --modversion opencv
4.0.0

未安装的包：　

-- Checking for module 'gtk+-3.0'
--   No package 'gtk+-3.0' found
-- Checking for module 'gtk+-2.0'
--   Found gtk+-2.0, version 2.24.32
-- Checking for module 'gthread-2.0'
--   Found gthread-2.0, version 2.56.1
-- Checking for module 'gstreamer-base-1.0'
--   No package 'gstreamer-base-1.0' found
-- Checking for module 'gstreamer-video-1.0'
--   No package 'gstreamer-video-1.0' found
-- Checking for module 'gstreamer-app-1.0'
--   No package 'gstreamer-app-1.0' found
-- Checking for module 'gstreamer-riff-1.0'
--   No package 'gstreamer-riff-1.0' found
-- Checking for module 'gstreamer-pbutils-1.0'
--   No package 'gstreamer-pbutils-1.0' found
-- Checking for module 'gstreamer-base-0.10'
--   No package 'gstreamer-base-0.10' found
-- Checking for module 'gstreamer-video-0.10'
--   No package 'gstreamer-video-0.10' found
-- Checking for module 'gstreamer-app-0.10'
--   No package 'gstreamer-app-0.10' found
-- Checking for module 'gstreamer-riff-0.10'
--   No package 'gstreamer-riff-0.10' found
-- Checking for module 'gstreamer-pbutils-0.10'
--   No package 'gstreamer-pbutils-0.10' found
-- Checking for module 'libdc1394-2'
--   No package 'libdc1394-2' found
-- Checking for module 'libdc1394'
--   No package 'libdc1394' found

PS

感谢网友：https://blog.csdn.net/weixin_41053564/article/details/81254410

感谢外国大佬：http://www.codebind.com/cpp-tutorial/install-opencv-ubuntu-cpp/ 该blog的实例在CV_LOAD_IMAGE_COLOR处修改为CV_HAL_DFT_STAGE_COLS
g++ main.cpp -o output pkg-config --cflags --libs opencv