"atomic bomb" commit. Reorganized OpenCV directory structure

samples/MacOSX/FaceTracker/FaceTracker.cpp

@@ -0,0 +1,86 @@
+
+#include <OpenCV/OpenCV.h>
+#include <cassert>
+#include <iostream>
+
+
+const char  * WINDOW_NAME  = "Face Tracker";
+const CFIndex CASCADE_NAME_LEN = 2048;
+      char    CASCADE_NAME[CASCADE_NAME_LEN] = "~/opencv/data/haarcascades/haarcascade_frontalface_alt2.xml";
+
+using namespace std;
+
+int main (int argc, char * const argv[]) 
+{
+    const int scale = 2;
+
+    // locate haar cascade from inside application bundle
+    // (this is the mac way to package application resources)
+    CFBundleRef mainBundle  = CFBundleGetMainBundle ();
+    assert (mainBundle);
+    CFURLRef    cascade_url = CFBundleCopyResourceURL (mainBundle, CFSTR("haarcascade_frontalface_alt2"), CFSTR("xml"), NULL);
+    assert (cascade_url);
+    Boolean     got_it      = CFURLGetFileSystemRepresentation (cascade_url, true, 
+                                                                reinterpret_cast<UInt8 *>(CASCADE_NAME), CASCADE_NAME_LEN);
+    if (! got_it)
+        abort ();
+    
+    // create all necessary instances
+    cvNamedWindow (WINDOW_NAME, CV_WINDOW_AUTOSIZE);
+    CvCapture * camera = cvCreateCameraCapture (CV_CAP_ANY);
+    CvHaarClassifierCascade* cascade = (CvHaarClassifierCascade*) cvLoad (CASCADE_NAME, 0, 0, 0);
+    CvMemStorage* storage = cvCreateMemStorage(0);
+    assert (storage);
+
+    // you do own an iSight, don't you ?!?
+    if (! camera)
+        abort ();
+
+    // did we load the cascade?!?
+    if (! cascade)
+        abort ();
+
+    // get an initial frame and duplicate it for later work
+    IplImage *  current_frame = cvQueryFrame (camera);
+    IplImage *  draw_image    = cvCreateImage(cvSize (current_frame->width, current_frame->height), IPL_DEPTH_8U, 3);
+    IplImage *  gray_image    = cvCreateImage(cvSize (current_frame->width, current_frame->height), IPL_DEPTH_8U, 1);
+    IplImage *  small_image   = cvCreateImage(cvSize (current_frame->width / scale, current_frame->height / scale), IPL_DEPTH_8U, 1);
+    assert (current_frame && gray_image && draw_image);
+    
+    // as long as there are images ...
+    while (current_frame = cvQueryFrame (camera))
+    {
+        // convert to gray and downsize
+        cvCvtColor (current_frame, gray_image, CV_BGR2GRAY);
+        cvResize (gray_image, small_image, CV_INTER_LINEAR);
+        
+        // detect faces
+        CvSeq* faces = cvHaarDetectObjects (small_image, cascade, storage,
+                                            1.1, 2, CV_HAAR_DO_CANNY_PRUNING,
+                                            cvSize (30, 30));
+        
+        // draw faces
+        cvFlip (current_frame, draw_image, 1);
+        for (int i = 0; i < (faces ? faces->total : 0); i++)
+        {
+            CvRect* r = (CvRect*) cvGetSeqElem (faces, i);
+            CvPoint center;
+            int radius;
+            center.x = cvRound((small_image->width - r->width*0.5 - r->x) *scale);
+            center.y = cvRound((r->y + r->height*0.5)*scale);
+            radius = cvRound((r->width + r->height)*0.25*scale);
+            cvCircle (draw_image, center, radius, CV_RGB(0,255,0), 3, 8, 0 );
+        }
+        
+        // just show the image
+        cvShowImage (WINDOW_NAME, draw_image);
+        
+        // wait a tenth of a second for keypress and window drawing
+        int key = cvWaitKey (100);
+        if (key == 'q' || key == 'Q')
+            break;
+    }
+    
+    // be nice and return no error
+    return 0;
+}