Ubuntu12.04 configure the qt4 + opencv2.4.1 environment

Article: http: wwwsamontabcomweb201206installing-opencv-2

First install g ++

hugo@hugo-ThinkPad-Edge:~$ sudo apt-get install g++

hugo@hugo-ThinkPad-Edge:~$ sudo apt-get install g++ automake

Install qt4

hugo@hugo-ThinkPad-Edge:~$ sudo apt-get install libqt4-dev qt4-dev-tools qt4-designer qt4-doc qt4-demos

Install qt4 creator

: Http://qt-project.org/downloads/

After the download is the run file, modify the permission and run it, and then install it on the GUI.

hugo@hugo-ThinkPad-Edge:~/Downloads$ sudo chmod 777 qt-creator-opensource-linux-x86_64-3.0.1.run 

Configure the opencv environment

First, update and upgrade the system.

hugo@hugo-ThinkPad-Edge:~$ sudo apt-get update

hugo@hugo-ThinkPad-Edge:~$ sudo apt-get upgrade

Install necessary dependent environments

sudo apt-get install build-essential libgtk2.0-dev libjpeg-dev libtiff4-dev libjasper-dev libopenexr-dev cmake python-dev python-numpy python-tk libtbb-dev libeigen2-dev yasm libfaac-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev libqt4-dev libqt4-opengl-dev sphinx-common texlive-latex-extra libv4l-dev libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev

Download, compile, and run opencv2.4.1 (2.4.8 is not recommended. I have problems after 2.4.8 is configured)

hugo@hugo-ThinkPad-Edge:~/Downloads$ wget http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.4.1/OpenCV-2.4.1.tar.bz2

hugo@hugo-ThinkPad-Edge:~/Downloads$ tar jxvf OpenCV-2.4.1.tar.bz2 

hugo@hugo-ThinkPad-Edge:~/Downloads$ cd OpenCV-2.4.1

hugo@hugo-ThinkPad-Edge:~/Downloads/Opencv-2.4.1$ mkdir build

hugo@hugo-ThinkPad-Edge:~/Downloads/Opencv-2.4.1$ cd build

hugo@hugo-ThinkPad-Edge:~/Downloads/OpenCV-2.4.1/build$  cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..

hugo@hugo-ThinkPad-Edge:~/Downloads/OpenCV-2.4.1/build$ make

hugo@hugo-ThinkPad-Edge:~/Downloads/OpenCV-2.4.1/build$ sudo make install

Edit environment variables

hugo@hugo-ThinkPad-Edge:~/Downloads/OpenCV-2.4.1/build$ sudo vim /etc/ld.so.conf.d/opencv.conf

Path to add the opencv Library:

/usr/local/lib

hugo@hugo-ThinkPad-Edge:~/Downloads/OpenCV-2.4.1/build$ sudo ldconfig

hugo@hugo-ThinkPad-Edge:~/Downloads/OpenCV-2.4.1/build$ sudo vim /etc/bash.bashrc 

Add at the end:

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

So far, the configuration is successful.