Introduction

Cocoa is very strict about how it operates. This means there are some changes when using the HighGUI library with Cocoa.

1. Your code must run from a secondary thread.
2. Your code should be inside a Cocoa Application (not a terminal application)

Note: While OpenCV compiles and mostly works with a terminal application, it is by chance. Apple does not guarantee results when this is done.

Skeleton of an OpenCV/Cocoa project

#include <opencv/cv.h>
#include <opencv/highgui.h>

int myCode(int argc, char *argv[]) {
// Your actual code goes here
}

int main(int argc, char *argv[]) {
return cvInitSystem(argc, argv, myCode);
}

Working example

A working example can be found under /samples/MacOSX-Cocoa It is the adapted version of the original MacOSX example which does face tracking using data from the default computer camera.