Added an example for the correlation_tracker

examples/CMakeLists.txt

@@ -108,6 +108,7 @@ add_example(timer_ex)
 add_example(train_object_detector)
 add_example(train_shape_predictor_ex)
 add_example(using_custom_kernels_ex)
+add_example(video_tracking_ex)
 add_example(xml_parser_ex)
 
 

examples/video_frames/license.txt

+Please read terms of use for the content of this zip file at this websites:
+English: http://creativecommons.org/licenses/by-sa/3.0/de/deed.en
+German: http://creativecommons.org/licenses/by-sa/3.0/de/
+
+
+Note that this video is from the BoBoT dataset (see http://www.iai.uni-bonn.de/~kleind/tracking/) but has been compressed a lot, cropped, and converted to grayscale to make the dlib archive file as small as possible.

examples/video_tracking_ex.cpp

+// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
+/*
+
+    This is an example illustrating the use of the Bulk Synchronous Parallel (BSP)
+    processing tools from the dlib C++ Library.  These tools allow you to easily setup a
+    number of processes running on different computers which cooperate to compute some
+    result.  
+
+*/
+
+#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;
+    }
+
+    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;
+    }
+
+    array2d<unsigned char> img;
+    load_image(img, files[0]);
+
+    correlation_tracker tracker;
+    tracker.start_track(img, centered_rect(point(93,110), 38, 86));
+
+    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;
+}
+