Steps to install OpenCV on Mac OS X for XCode

Reference: http://tilomitra.com/opencv-on-mac-osx/

OpenCV installation steps:
1. Install MacPorts
2. Install CMake by "sudo port install cmake"
3. Get OpenCV source, http://opencv.willowgarage.com/wiki/InstallGuide, and untar it
4. Build OpenCV
   Go to the folder where you untar the OpenCV source to.
   Make a separate folder for building
   . make build
   . cd build
   . cmake -G "Unix Makefiles" ..
   Now make OpenCV
   . make -j8
   . sudo make install
   The OpenCV will be installed to /usr/local
5. Done installing the OpenCV on Mac OS X

Create a sample project on XCode with OpenCV
1. Start a new XCode "Command Line Tool" project with Type C++
2. Add all the libopencv*.dylib (or the ones you need) into the project from /usr/local/lib with "Copy items into destination group's folder (if needed)" checked
3. Add "/usr/local/include" into "Header Search Path" in Build Settings of project
4. Add "/usr/local/lib" into "Library Search Path" in Build Settings of project
5. Either 4.1 or 4.2
   4.1 Select "libstdc++ (GNU C++ standard library)" instead of "libc++ (LLVM C++ standard library with C++11 support)" in "Apple LLVM compiler 4.2 - Language" in Build Settings
   4.2 Select "LLVM GCC 4.2" instead of "Default compiler (Apple LLVM compiler 4.2)" in "Compiler for C/C++/Objective-C" in Build Settings
6. Write some codes to test OpenCV

#include

#include

#include "opencv2/core/core.hpp"

using namespace cv ;

int main(int argc, char** argv)

{

#if 0

    //get the image from the directed path

    IplImage* img = cvLoadImage("/Users/Howard/Desktop/Codes/OpenCV/CV/Lena_512.bmp", 1);

    //NSLog(img);

    //create a window to display the image

    cvNamedWindow("picture", 1);

    //show the image in the window

    cvShowImage("picture", img);

    //wait for the user to hit a key

    cvWaitKey(0);

    //delete the image and window

    cvReleaseImage(&img);

    cvDestroyWindow("picture");

#else

    Mat img = imread("/Users/Howard/Desktop/Codes/OpenCV/CV/Lena_512.bmp",     CV_LOAD_IMAGE_UNCHANGED);

    if (img.data == NULL)

    {

        printf("\n Image cannot be loaded") ;

        system("pause");

        return -1;

    }

    namedWindow("OrgImage", CV_WINDOW_AUTOSIZE);

    imshow("OrgImage", img);

    waitKey(0) ;

#endif

}

7. That's all