"atomic bomb" commit. Reorganized OpenCV directory structure

samples/cpp/connected_components.cpp

@@ -0,0 +1,51 @@
+#include "cv.h"
+#include "highgui.h"
+
+using namespace cv;
+
+Mat img;
+int threshval = 100;
+
+void on_trackbar(int, void*)
+{
+	Mat bw = threshval < 128 ? (img < threshval) : (img > threshval);
+    
+    vector<vector<Point> > contours;
+    vector<Vec4i> hierarchy;
+    
+    findContours( bw, contours, hierarchy, CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE );
+	
+	Mat dst = Mat::zeros(img.size(), CV_8UC3);
+
+    if( contours.size() > 0 )
+    {
+        // iterate through all the top-level contours,
+        // draw each connected component with its own random color
+        int idx = 0;
+        for( ; idx >= 0; idx = hierarchy[idx][0] )
+        {
+            Scalar color( (rand()&255), (rand()&255), (rand()&255) );
+            drawContours( dst, contours, idx, color, CV_FILLED, 8, hierarchy );
+        }
+    }
+
+	imshow( "Connected Components", dst );
+}
+
+int main( int argc, char** argv )
+{
+    // the first command line parameter must be file name of binary 
+    // (black-n-white) image
+    if( !(img=imread(argc == 2 ? argv[1] : "stuff.jpg", 0)).data)
+        return -1;
+
+    namedWindow( "Image", 1 );
+    imshow( "Image", img );
+
+	namedWindow( "Connected Components", 1 );
+	createTrackbar( "Threshold", "Connected Components", &threshval, 255, on_trackbar );
+	on_trackbar(threshval, 0);
+
+    waitKey(0);
+    return 0;
+}