Using OpenCV with gcc and CMake

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1. DisplayImage.cpp code below:

#include <stdio.h>
#include <iostream>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main(int argc,char** argv)
{
	if ( argc !=2){
		cout << "usage: DisplayImage.out <Image__Path>" <<endl;
		return -1;
	}

	Mat image;
	image = imread ( argv[1], 1);

	if ( !image.data) {
		cout << "No image data " <<endl;
		return -1;
	}

	namedWindow("Display Image",WINDOW_AUTOSIZE );
	imshow("Display Image", image);

	waitKey(0);

	return 0;
}

2. CMakeList.txt code below:

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

3. Complie it with cmake make and run it:

cd <DisplayImage_directory>
cmake .
make

./DisplayImage lena.jpg