Linux Mint 18 下部署OpenCV 3.4.10

操作系統信息

jwllinux@jwlLinux ~ $ uname -a

Linux jwlLinux 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:34:49 UTC 2016 i686 i686 i686 GNU/Linux

jwllinux@jwlLinux ~ $ lsb_release -a

LSB Version:    core-9.20160110ubuntu0.2-ia32:core-9.20160110ubuntu0.2-noarch:cxx-3.0-ia32:cxx-3.0-noarch:cxx-3.1-ia32:cxx-3.1-noarch:cxx-3.2-ia32:cxx-3.2-noarch:cxx-4.0-ia32:cxx-4.0-noarch:cxx-4.1-ia32:cxx-4.1-noarch:security-9.20160110ubuntu0.2-ia32:security-9.20160110ubuntu0.2-noarch

Distributor ID: LinuxMint

Description:    Linux Mint 18 Sarah

Release:        18

Codename:       sarah

下載opencv3. 4.10源碼

下載鏈接：https://opencv.org/releases/

opencv-3.4.10.zip

依賴包安裝

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 pkg-config libgtk2.0-dev libavcodec-dev libavformat-dev libswscale-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
sudo apt-get install libtbb2 libtbb-dev	TBB：Thread Building Blocks線程構建模塊
sudo apt install qtbase5-dev

主要工具版本

jwllinux@jwlLinux ~/Downloads $ cmake -version

cmake version 3.5.1

jwllinux@jwlLinux ~/Downloads $ make -v

GNU Make 4.1

jwllinux@jwlLinux ~/Downloads $ gcc --version

gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609

jwllinux@jwlLinux ~/Downloads $ g++ --version

g++ (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609

Copyright (C) 2015 Free Software Foundation, Inc.

jwllinux@jwlLinux ~/Downloads $ git --version

git version 2.7.4

解壓組織、編譯、安裝

　　解壓文件，新建一個文件夾用於安放編譯結果，然後安裝（選擇安裝在/usr/local下面）　

$ unzip opencv-3.4.10.zip
$ cd opencv-3.4.10
$ mkdir release
$ cd release
$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=OFF -D WITH_OPENGL=OFF ..

說明：

    這裏面主要是 CMake的一些配置項，最後的‘..’ 表示到上層目錄下去找CMakeLists.txt文件，筆者看了下OpenCV項目提供的CMakeLists.txt文件，相對複雜，就不過多介紹了。

   另外，知乎文檔評價CMake，學習曲線確實高。鏈接如下：

如何評價CMake

cmake -D	-D <var>:<type>=<value>, -D <var>=<value>               Create a cmake cache entry.
..	表示CMakeLists.txt在上層目錄

執行完後，會產生整個OpenCV項目的構建文件（build)，輸出如下：

$ make -j $(nproc)      

   // make -j 多核處理器進行編譯(默認的make只用一核，很慢)，$(nproc)返回自己機器的核數

 

　$ make install                 //把編譯結果安裝到 /usr/local的 lib/ 和 include/下面

可能遇到的問題

用CMake構建使用Qt5的源代碼。它退出了這個錯誤：

         CMake Error at CMakeLists.txt:20 (find_package):By not providing "FindQt5Core.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "Qt5Core", but CMake did not find one.Could not find a package configuration file provided by "Qt5Core" with any of the following names:

    Qt5CoreConfig.cmake

    qt5core-config.cmake

  Add the installation prefix of "Qt5Core" to CMAKE_PREFIX_PATH or set "Qt5Core_DIR" to a directory containing one of the above files.If "Qt5Core" provides a separate development package or SDK, be sure it has been installed.

解決方案：

​​​​​​​方案一：

     需要安裝包qtbase5-dev。

$ sudo apt install qtbase5-dev

方案二：

  Cmake構建選項中，將-D WITH_QT=OFF 填爲OFF

至於此構建選項對編譯處理的OpenCV的影響，筆者後續用到後再作詳細分析。