Installing OpenCV-2.4.11 from core in Ubuntu 14.04

Note: This tutorial has been tested on Ubuntu 14.04 LTS with OpenCV 2.4.11 which is most stable opencv version till date. If you find some configuration settings erroneous please do mention the platform details in the comment and the error Thanks!

1. KEEP UBUNTU OR DEBIAN UP TO DATE

Open your terminal and execute:

sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade && sudo apt-get autoremove.

2. INSTALL THE DEPENDENCIES

Build tools:

sudo apt-get install build-essential cmake

GUI:

sudo apt-get install qt5-default libvtk6-dev

Media I/O:

sudo apt-get install zlib1g-dev libjpeg-dev libwebp-dev libpng-dev libtiff5-dev libjasper-dev libopenexr-dev libgdal-dev

Video I/O:

sudo apt-get install libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev yasm libopencore-amrnb-dev libopencore-amrwb-dev libv4l-dev libxine2-dev

Parallelism and linear algebra libraries:

sudo apt-get install libtbb-dev libeigen3-dev

Python:

sudo apt-get install python-dev python-tk python-numpy python3-dev python3-tk python3-numpy

sudo apt-get install build-essential checkinstall cmake pkg-config yasm

sudo apt-get install libtiff4-dev libjpeg-dev libjasper-dev

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine-dev libgstreamer0.10-dev
libgstreamer-plugins-base0.10-dev libv4l-dev. 

Now Download OpenCV from opencv.org or from this OpenCV-2.4.11
4. COMPILE AND INSTALL OPENCV 

In your terminal, make sure you are within the OpenCV directory and run the following commands:

mkdir build

cd build

cmake -D WITH_XINE=ON -D WITH_OPENGL=ON -D WITH_TBB=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_V4L=ON..

make -j4

sudo make install

5. CONFIGURE OPENCV 

1. Open a text editor and edit the ld.so.conf file by changing directory into it with privileges

sudo nano /etc/ld.so.conf

 2. Enter the following line into it

/usr/local/lib

3. Close and save and exit and enter the following command

sudo ldconfig

sudo nano /etc/bash.bashrc

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

export PKG_CONFIG_PATH

4. Now you are ready for testing

cd ~/OpenCV-2.4.6/samples/c

chmod +x build_all.sh

./build_all.sh

5. Try the python examples and make sure they work

python ~/OpenCV-2.4.10/samples/python2/turing.p­y