Installing OpenCV on Linux and using it with Eclipse

Last month I made a tutorial on how to build and install OpenCV 3.2 on Windows 10 using CMake and MinGW on Windows. Since then, I received some requests asking for a Linux equivalent one. So, here is the step-by-step.

Getting Started

Start running the well known apt-get update and apt-get upgrade

Building and configuring Linux OpenCV

After that, install the required dependencies by using the following commands;

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 qtbase5-dev python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

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 qtbase5-dev python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

Download and extract the OpenCV source using the commands (you could change the version number to the one you want).

sudo wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.2.0.zip
sudo unzip opencv.zip

1 2	sudo wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.2.0.zip sudo unzip opencv.zip

Access the OpenCV folder and execute:

mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..
make -j $(nproc)

mkdir build

cd build

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..

make -j $(nproc)

And then install with: sudo make install
Finish the installation creating the necessary link and cache to OpenCV library using:

sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig

1 2	sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf' sudo ldconfig

Now reboot. OpenCV is ready to use.

Eclipse configuration

Open Eclipse and create a C++ program using the following OpenCV basic example:

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main( int argc, char** argv )
{
    if( argc != 2)
    {
     cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
     return -1;
    }

    Mat image;
    image = imread(argv[1], CV_LOAD_IMAGE_COLOR);   // Read the file

    if(! image.data )                              // Check for invalid input
    {
        cout <<  "Could not open or find the image" << std::endl ;
        return -1;
    }

    namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
    imshow( "Display window", image );                   // Show our image inside it.

    waitKey(0);                                          // Wait for a keystroke in the window
    return 0;
}

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <iostream>

using namespace cv;

using namespace std;

int main( int argc, char** argv )

{

if( argc != 2)

{

cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;

return -1;

}

Mat image;

image = imread(argv[1], CV_LOAD_IMAGE_COLOR); // Read the file

if(! image.data ) // Check for invalid input

{

cout << "Could not open or find the image" << std::endl ;

return -1;

}

namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.

imshow( "Display window", image ); // Show our image inside it.

waitKey(0); // Wait for a keystroke in the window

return 0;

}

If you want to make sure where the OpenCV is, enter
pkg-config --cflags opencv
in the terminal to see where it is installed;
Probably, it will be at
/usr/local/include/opencv
Go to
Project > Properties > C/C++ Build > Settings > GCC C++ Compiler > Includes
and insert the OpenCV include path, as shown in the image.

Go to
Project > Properties > C/C++ Build > Settings > GCC C++ Linker > Libraries
, and add this to the Libraries (-l), separately as shown in the image:

opencv_core opencv_imgproc opencv_highgui opencv_ml opencv_video opencv_features2d opencv_calib3d opencv_objdetect opencv_contrib opencv_legacy opencv_flann

1	opencv_core opencv_imgproc opencv_highgui opencv_ml opencv_video opencv_features2d opencv_calib3d opencv_objdetect opencv_contrib opencv_legacy opencv_flann

Add the path to your libs folder on Library search path (-L);
If you don’t know where it is, execute pkg-config --libs opencv
- Probably, will be /usr/local/lib
Done! Build the project, and it’s finished.

Jean Vitor

Recent Posts

Tag Cloud

Recent Comments

Archives

Categories

Getting Started

Building and configuring Linux OpenCV

Eclipse configuration

Leave a ReplyCancel reply