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    Using OpenCV With GCC and CMake - OpenCV 2.4.13.7 Documentation PDF

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    Using OpenCV With GCC and CMake - OpenCV 2.4.13.7 Documentation PDF

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    Using OpenCV With GCC and CMake - OpenCV 2.4.13.7 Documentation PDF

    Uploaded by

    Cuantico Manuel

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
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    OpenCV 2.4.13.

    7 documentation » OpenCV Tutorials » Introduction to OpenCV » previous | next | index

    Using OpenCV with gcc and CMake


    Note: We assume that you have successfully installed OpenCV in your workstation.

    The easiest way of using OpenCV in your code is to use CMake. A few advantages (taken from the Wiki):
    1. No need to change anything when porting between Linux and Windows
    2. Can easily be combined with other tools by CMake( i.e. Qt, ITK and VTK )
    If you are not familiar with CMake, checkout the tutorial on its website.

    Search Steps
    Table Of Contents Create a program using OpenCV
    Using OpenCV with gcc and CMake
    Steps Let’s use a simple program such as DisplayImage.cpp shown below.
    Create a program using
    OpenCV
    #include <stdio.h>
    Create a CMake file
    #include <opencv2/opencv.hpp>
    Generate the executable
    Result using namespace cv;

    Previous topic int main(int argc, char** argv )


    Installation in Linux {
    if ( argc != 2 )
    Next topic {
    printf("usage: DisplayImage.out <Image_Path>\n");
    Using OpenCV with Eclipse (plugin return -1;
    CDT) }

    This Page Mat image;


    image = imread( argv[1], 1 );
    Show Source
    if ( !image.data )
    {
    printf("No image data \n");
    return -1;
    }
    namedWindow("Display Image", WINDOW_AUTOSIZE );
    imshow("Display Image", image);

    waitKey(0);

    return 0;
    }

    Create a CMake file


    Now you have to create your CMakeLists.txt file. It should look like this:

    cmake_minimum_required(VERSION 2.8)
    project( DisplayImage )
    find_package( OpenCV REQUIRED )
    add_executable( DisplayImage DisplayImage.cpp )
    target_link_libraries( DisplayImage ${OpenCV_LIBS} )

    Generate the executable


    This part is easy, just proceed as with any other project using CMake:

    cd <DisplayImage_directory>
    cmake .
    make

    Result
    By now you should have an executable (called DisplayImage in this case). You just have to run it giving an image location as an argument, i.e.:

    ./DisplayImage lena.jpg

    You should get a nice window as the one shown below:

    Help and Feedback


    You did not find what you were looking for?

    Ask a question on the Q&A forum.


    If you think something is missing or wrong in the documentation, please file a bug report.

    OpenCV 2.4.13.7 documentation » OpenCV Tutorials » Introduction to OpenCV » previous | next | index

    © Copyright 2011-2014, opencv dev team. Last updated on Dec 31, 2019. Created using Sphinx 1.3.6.

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