Ubuntu配置OpenCV终极解决方案

1. 安装依赖

一定要安装全，避免之后出现各种奇怪的问题

sudo apt-get install build-essential
sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev 
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev liblapacke-dev
sudo apt-get install libxvidcore-dev libx264-dev
sudo apt-get install libatlas-base-dev gfortran 
sudo apt-get install ffmpeg

2. 下载opencv和opencv_contrib源码
   推荐下载​​​.tar.gz​​格式并解压，之后把opencv_contirb放到opencv文件夹中

我使用的是4.2.0版本
​​​Releases · opencv/opencv · GitHub​​​​Releases · opencv/opencv_contrib · GitHub​​

tar -zxvf opencv-4.2.0.tar.gz 
tar -zxvf opencv_contirb-4.2.0.tar.gz

mv opencv_contirb-4.2.0/ opencv-4.2.0/

3. 编译

sudo mkdir build && cd build

sudo cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/Developer/opencv-4.2.0/opencv_contrib-4.2.0/modules/ ..

sudo make -j${nproc}

sudo make install

注意第二步要更换成自己的路径
第三步​​​${nproc}​​为使用所有CPU核进行编译

【报错：找不到boostdesc_bgm.i等一系列​​.i​​​文件】
解决方案：​​GitHub - omega-Lee/OpenCV_boostdesc_vgg_file: 在编译OpenCV的时候经常出现缺少.i文件，所以一次性把他们做个集合​​​ 把这个repo中文件放到​​opencv_contrib/modules/xfeatures2d/src/​​中

【报错：找不到​​xxx.impl.hpp​​​文件】
解决方案：直接去Opencv官方repo中找到这些文件放到对应位置即可 ​​GitHub - opencv/opencv: Open Source Computer Vision Library​​

【报错：找不到 feature2d/test/test_detectors_regression.impl.hpp】
解决方案：将这些文件复制到编译文件夹下：​​cp opencv/modules/features2d build​​

4. 配置路径

1. ​​vim/etc/ld.so.conf.d/opencv.conf​​​，在行尾添加​​/usr/local/lib​​
2. ​​ldconfig​​让其生效
3. ​​vim /etc/bash.bashrc​​​，在行尾添加​​export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig​​
4. ​​source /etc/bash.bashrc​​更新bash

5. 检验是否安装成功：​​pkg-config opencv --modversion​​ 【报错：Package opencv was not found in the pkg-config search path.】
   解决方案：

cd /usr/local/lib
sudo mkdir pkgconfig
cd pkgconfig
sudo vim opencv.pc

在​​opencv.pc​​中添加以下信息

prefix=/usr/local
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib

Name: opencv
Description: The opencv library
Version:4.2.0
Cflags: -I${includedir}/opencv4
Libs: -L${libdir} -lopencv_shape -lopencv_stitching -lopencv_objdetect -lopencv_superres -lopencv_videostab -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_video -lopencv_photo -lopencv_ml -lopencv_imgproc -lopencv_flann  -lopencv_core
~

将文件导出到环境变量

export  PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

Resources

​​在Linux下用正确的姿势安装OpenCV - 知乎​​