AmitThakur/opencv_install.md

## opencv_install.md

      
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              opencv_install.md
            
          
    opencvp

OpenCV Practice Repository https://github.com/AmitThakur/opencvp.git
Installing OpenCV on Linux platform (Ubuntu)

Credits:
[http://www.raben.com/book/export/html/3]
[http://karytech.blogspot.in/2012/05/opencv-24-on-ubuntu-1204.html]

Install developer environment to build OpenCV source code:

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


Install Image I/O libraries:

sudo apt-get install libjpeg62-dev
sudo apt-get install libtiff4-dev libjasper-dev


Install Python development environment:

sudo apt-get install python-dev python-numpy


Install Video I/O libraries:

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

Optional

Install Intel TBB for OpenCV parallel coding:

sudo apt-get install libtbb-dev


Install GUI backend-GTK or QT:

sudo apt-get install libqt4-dev libgtk2.0-dev

Get OpenCV Source Code:
Get latest version using Git:
cd ~/path/to/working/directory
git clone https://github.com/Itseez/opencv.git

Or get the source package from http://opencv.org/downloads.html, extract and create build directory inside opencv directory:
(Replace * with numbers as per requirement)
tar -xvf OpenCV-*.*.*.tar.bz2
cd OpenCV-*.*.*
mkdir build
cd build


Now is the time to generate configure OpenCV build using Cmake. Last two dots are for source directory of OpenCV (Parent Directory here):

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local
    -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 ..


Compiling: (add -j3 or -j4 to make compiling faster)

make


Install:

sudo make install

Using OpenCV in your project:

First using following command to find out the locations of OpenCV files for include path(-l)

pkg-config --cflags opencv

which gives results like this:
-I/usr/local/include/opencv -I/usr/local/include

So include path is: /usr/local/include/opencv

Now we find libraries path using following path:

pkg-config --libs opencv

which gives result like this:
/usr/local/lib/libopencv_bioinspired.so /usr/local/lib/libopencv_calib3d.so ...


So Library search path (-L) is: /usr/local/lib
These path can be included in Compiler Settings of IDEs.
Uninstalling:
cd /path/to/OpenCV-*.*.*/build
sudo make uninstall