Ubuntu18.04 使用 Cmake-gui 安装 OpenCV

1. 下载安装包

去官网下载源码 https://opencv.org/ ，版本自行选择

2. 安装依赖

sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"

sudo apt update

sudo apt install libjasper1 libjasper-dev

sudo apt-get install libgtk-3-dev libgtk2.0-dev pkg-config 

# 分步装

sudo apt-get install build-essential

# opencv4.1.0需要 libgtk-3-dev

sudo apt-get install cmake libgtk-3-dev libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev

sudo apt-get install python3-dev python3-numpy python-dev python-numpy libpython3.6-dev libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff5-dev libjasper-dev libdc1394-22-dev # 处理图像所需的包

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev liblapacke-dev

sudo apt-get install libopenexr-dev

sudo apt-get install libxvidcore-dev libx264-dev # 处理视频所需的包

sudo apt-get install libatlas-base-dev gfortran # 优化opencv功能

sudo apt-get install ffmpeg

 sudo apt-get -y install build-essential cmake libgtk-3-dev libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev python3-dev python3-numpy python-dev python-numpy libpython3.6-dev libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff5-dev libjasper-dev libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev libv4l-dev liblapacke-dev libopenexr-dev libxvidcore-dev libx264-dev libatlas-base-dev gfortran ffmpeg

3. 配置 (我下载的是opencv4.2.0)

cd opencv-4.2.0/

mkdir build && cd build

cmake-gui ..

如下截图：

源码和编译目录已自动选好了

点击 Configure  弹框后点击 Finish, 就会开始配置，如下图配置成功

 注意: 若安装了anaconda, 先将anaconda 的lib文件夹重命名为lib_bak，再去编译opencv, 否则会有冲突

如上图红色部分是编译选项

(1)在CMAKE_BUILD_TYPE 值处输入RELEASE

(2)BUILD_TIFF=ON 若有的话勾选上，否则后面编译会报错

(3)OPENCV_CENERATE_PKGCONFIG 勾选上, 会在 /usr/local/lib 下生成 pkgconfig/opencv4.pc

(4)CMAKE_INSTALL_PREFIX显示了默认的安装目录，生成makefile文件最后执行 make install时就会安装到这个目录，这里可以根据个人需求更改,其他保持不变。

4. 编译安装

sudo make -j8

sudo make install

报错:

../../lib/libopencv_imgcodecs.so.4.5.5: undefined reference to `TIFFReadDirectory@LIBTIFF_4.0'

解决: BUILD_TIFF=ON

5. 配置 opencv 环境变量

sudo gedit /etc/ld.so.conf.d/opencv.conf

在最后添加:

/usr/local/lib

sudo ldconfig

sudo gedit /etc/bash.bashrc

在最后添加：

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig

 

6. 测试是否安装成功

pkg-config --cflags --libs opencv4 (4.0版本及以上的是 opencv4 ， 否则 opencv )

如下图:

 

可参考: 【安装教程】Ubuntu18.04中用CMake-gui安装OpenCV4.1.0和OpenCV_contrib-4.1.0（图文）_wuyu1125的博客-优快云博客_cmake-gui opencv