在Ubuntu下安裝OpenCV

在Ubuntu下安裝OpenCV

Ubuntu系統版本：Ubuntu Kylin 14.04
OpenCV軟件版本：opencv-2.4.10
Opencv官網：opencv.org

在download中下載opencv-2.4.10中OpenCV for Linux/Mac
按照THE INSTALLATION的步驟安裝，網址：
http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html#linux-installation

提前需要的依賴包：

• GCC 4.4.x or later. This can be installed with:
• CMake 2.6 or higher;
• Git;
• GTK+2.x or higher, including headers (libgtk2.0-dev);
• pkg-config;
• Python 2.6 or later and Numpy 1.5 or later with developer packages (python-dev, python-numpy);
• ffmpeg or libav development packages: libavcodec-dev, libavformat-dev, libswscale-dev;
• [optional] libdc1394 2.x;
• [optional] libjpeg-dev, libpng-dev, libtiff-dev, libjasper-dev.

輸入命令：

sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config python-dev python-numpy libavcodec-dev libavformat-dev libswscale-dev libdc1394 2.x libjpeg-dev libpng-dev libtiff-dev libjasper-dev

sudo apt-get update

sudo apt-get upgrade

將opencv-2.4.10解壓縮到當前目錄：

unzip opencv-2.4.10.zip

或者將其解壓縮到指定目錄：

unzip opencv-2.4.10 -d <directory name>

用CMake創建OpenCV
基本格式是：

cmake [<some optional parameters>] <path to the OpenCV source directory>

cd ~/opencv-2.4.10

mkdir release

cd release

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ~/<my_working_directory>/opencv-2.4.10

在CMake成功後

make

sudo make install

在make過程中如果出現類似以下問題：
[ 14%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/system.cpp.o /home/test/autobuild/instance-0/output/build/opencv-2.4.10/modules/core/src/system.cpp: In function ‘(static initializers for /home/test/autobuild/instance-0/output/build/opencv-2.4.10/modules/core/src/system.cpp)’: /home/test/autobuild/instance-0/output/build/opencv-2.4.10/modules/core/src/system.cpp:280:10: error: inconsistent operand constraints in an ‘asm’ make[3]: * [modules/core/CMakeFiles/opencv_core.dir/src/system.cpp.o] Error 1
可以參照網址中的辦法，在system.cpp中進行刪改：
https://github.com/Itseez/opencv/commit/ea50be0529c248961e1b66293f8a9e4b807294a6

配置openCV參數設置
在/etc/ld.so.conf.d/opencv.conf文件中加入一行：/usr/local/lib ,
可能會沒有opencv.conf這個文件，那我們就自己創建一個:

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

使用下面這條命令：

sudo ldconfig   

在 /etc/ bash.bashrc（sudo gedit /etc /bash.bashrc以root進入才能修改）中加入：
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH

至此，OpenCV安裝配置完畢

測試：
將opencv源碼包下的samples/c拷貝出，

chmod +x build_all.sh

 ./build_all.sh 

`./facedetect –cascade=”/usr/local/share/OpenCV/haarcascades/haarcascade_frontalface_alt.xml” –scale=1.5 lena.jpg

結果如下：