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diff --git a/ml/dlib/examples/video_tracking_ex.cpp b/ml/dlib/examples/video_tracking_ex.cpp
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+// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
+/*
+
+    This example shows how to use the correlation_tracker from the dlib C++ library.  This
+    object lets you track the position of an object as it moves from frame to frame in a
+    video sequence.  To use it, you give the correlation_tracker the bounding box of the
+    object you want to track in the current video frame.  Then it will identify the
+    location of the object in subsequent frames.
+
+    In this particular example, we are going to run on the video sequence that comes with
+    dlib, which can be found in the examples/video_frames folder.  This video shows a juice
+    box sitting on a table and someone is waving the camera around.  The task is to track the
+    position of the juice box as the camera moves around.
+*/
+
+#include <dlib/image_processing.h>
+#include <dlib/gui_widgets.h>
+#include <dlib/image_io.h>
+#include <dlib/dir_nav.h>
+
+
+using namespace dlib;
+using namespace std;
+
+int main(int argc, char** argv) try
+{
+    if (argc != 2)
+    {
+        cout << "Call this program like this: " << endl;
+        cout << "./video_tracking_ex ../video_frames" << endl;
+        return 1;
+    }
+
+    // Get the list of video frames.  
+    std::vector<file> files = get_files_in_directory_tree(argv[1], match_ending(".jpg"));
+    std::sort(files.begin(), files.end());
+    if (files.size() == 0)
+    {
+        cout << "No images found in " << argv[1] << endl;
+        return 1;
+    }
+
+    // Load the first frame.  
+    array2d<unsigned char> img;
+    load_image(img, files[0]);
+    // Now create a tracker and start a track on the juice box.  If you look at the first
+    // frame you will see that the juice box is centered at pixel point(92,110) and 38
+    // pixels wide and 86 pixels tall.
+    correlation_tracker tracker;
+    tracker.start_track(img, centered_rect(point(93,110), 38, 86));
+
+    // Now run the tracker.  All we have to do is call tracker.update() and it will keep
+    // track of the juice box!
+    image_window win;
+    for (unsigned long i = 1; i < files.size(); ++i)
+    {
+        load_image(img, files[i]);
+        tracker.update(img);
+
+        win.set_image(img); 
+        win.clear_overlay(); 
+        win.add_overlay(tracker.get_position());
+
+        cout << "hit enter to process next frame" << endl;
+        cin.get();
+    }
+}
+catch (std::exception& e)
+{
+    cout << e.what() << endl;
+}
+