Installation Opencv on Mac OS X with Homebrew

Firstly, if you don’t have homebrew, open terminal window and install it with this command;

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

after that, update homebrew;

brew update

You can now install opencv.

brew install homebrew/science/opencv

Homebrew will start to install opencv. This process may take a little longer.

When opencv installed, you will see this summary;

You can see opencv location in this summary.

Test Program

This program just shows a image. Write in terminal window;

vim testcode.cpp

you will see vim editor.

We will write our code here. Press i to enter insert mode and write this program.

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

using namespace cv;
using namespace std;

int main( int argc, char** argv )
{
Mat image;
image = imread(“/home/Users/64pin/Pictures/testpic.jpg”, 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;
}

Press ESC to exit insert mode. Then, write this command and press enter;

:wq

Now, we should compile this cpp file.

g++ -o cvtestprog opencvtest.cpp -I/usr/local/Cellar/opencv/2.4.12_2/include -L/usr/local/Cellar/opencv/2.4.12_2/lib -lopencv_highgui.2.4.12 -lopencv_core.2.4.12

cvtestprog is executable file. Run program.

./cvtestprog

Result:

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