ubuntu Opencv4及扩展模块编译安装过程_opencv4.pc

ubuntu Opencv4及扩展模块编译安装过程

以下两个文件是20211223从github下载的，网络好的可从github下载
opencv4下载
opencv_contrib-4.x下载

由于国内网络限制，还需要下载所需额外文件
包括了
ippicv_2019_lnx_intel64_general_20180723.tgz
face_landmark_model.dat
boostdesc_bgm.i系列
vgg_generated_48.i系列

1.将解压后 boostdesc_bgm.i,vgg_generated_48.i等opencv4 文件夹中的文件拷贝到opencv_contrib-4.x/modules/xfeatures2d/src目录中
2.将ippicv_2019_lnx_intel64_general_20180723.tgz 和face_landmark_model.dat 放到某个目录/xxx/download/中；打开opencv-4.x/3rdparty/ippicv/ippicv.cmake，修改https://raw.githubusercontent.com/opencv/opencv_3rdparty/${IPPICV_COMMIT}/ippicv/为file:///xxx/download/；打开opencv_contrib-4.x/modules/face/CMakeLists.txt，修改https://raw.githubusercontent.com/opencv/opencv_3rdparty/${__commit_hash}/为file:///xxx/download/
3.安装依赖

sudo apt-get update
sudo apt-get upgrade
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
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可能出现libjasper-dev无法安装的问题，
如下操作解决：

sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
sudo apt update
sudo apt install libjasper1 libjasper-dev
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4.安装cmake-gui

sudo apt-get install cmake-gui
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有需要省级cmake的可以升个级（升级最好不要卸载，直接覆盖升级） 链接

5.配置cmake-gui
在opencv-4.x中新建build文件夹
配置好文件夹路径
这里没有编译wechat_qrcode模块（需要下载额外文件），取消了这个的勾选
配置扩展模块路径
配置好后点击 Configure

6.转到build文件夹内，

cd opencv-4.x/build
sudo make -j8
sudo make install
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默认安装到了/usr/local，可在cmake-gui中更改

7.配置 添加环境变量

sudo gedit /etc/ld.so.conf.d/opencv.conf
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添加如下内容，并保存:/usr/local/lib
配置库sudo ldconfig

sudo gedit /etc/bash.bashrc
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在末尾添加如下内容

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig 
export PKG_CONFIG_PATH
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再更新一下

source bash.bashrc
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8.创建opencv4.pc

sudo gedit /usr/local/lib/pkgconfig/opencv4.pc
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添加如下内容

# Package Information for pkg-config
prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir_old=${prefix}/include/opencv4/opencv
includedir_new=${prefix}/include/opencv4

Name: OpenCV
Description: Open Source Computer Vision Library
Version: 4.2.0
Libs: -L${exec_prefix}/lib -lopencv_gapi -lopencv_stitching -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_dnn_objdetect -lopencv_dpm -lopencv_face -lopencv_freetype -lopencv_fuzzy -lopencv_hfs -lopencv_img_hash -lopencv_line_descriptor -lopencv_quality -lopencv_reg -lopencv_rgbd -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_phase_unwrapping -lopencv_superres -lopencv_optflow -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_dnn -lopencv_plot -lopencv_videostab -lopencv_video -lopencv_xfeatures2d -lopencv_shape -lopencv_ml -lopencv_ximgproc -lopencv_xobjdetect -lopencv_objdetect -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_flann -lopencv_xphoto -lopencv_photo -lopencv_imgproc -lopencv_core
Libs.private: -ldl -lm -lpthread -lrt
Cflags: -I${includedir_old} -I${includedir_new}
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pkg测试

pkg-config --modversion opencv4
pkg-config --cflags --libs opencv4
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参考链接：
https://blog.csdn.net/weixin_41053564/article/details/81254410
https://blog.csdn.net/weixin_40854506/article/details/115289098
https://blog.csdn.net/zzyczzyc/article/details/87954858
https://blog.csdn.net/lwqldsyzx/article/details/105722488
https://blog.csdn.net/weixin_49353816/article/details/113785090
https://blog.csdn.net/wangxubo1988/article/details/114300683