add Tracker and MultiTracker python bindings

modules/tracking/CMakeLists.txt

 set(the_description "Tracking API")
-ocv_define_module(tracking opencv_imgproc opencv_core opencv_video opencv_highgui opencv_datasets)
+ocv_define_module(tracking opencv_imgproc opencv_core opencv_video opencv_highgui opencv_datasets WRAP python)

modules/tracking/include/opencv2/tracking/onlineMIL.hpp

@@ -58,7 +58,7 @@ namespace cv
 
 class ClfOnlineStump;
 
-class ClfMilBoost
+class CV_EXPORTS ClfMilBoost
 {
  public:
   struct CV_EXPORTS Params

modules/tracking/samples/multitracker.py

+import numpy as np
+import cv2
+
+cv2.namedWindow("tracking")
+camera = cv2.VideoCapture("E:/code/opencv/samples/data/768x576.avi")
+tracker = cv2.MultiTracker("MIL")
+bbox1 = (638.0,230.0,56.0,101.0)
+bbox2 = (240.0,210.0,60.0,104.0)
+bbox3 = (486.0,149.0,54.0,83.0)
+init_once = False
+
+while camera.isOpened():
+    ok, image=camera.read()
+    if not ok:
+        print 'no image read'
+        break
+
+    if not init_once:
+        # add a list of boxes:
+        ok = tracker.add(image, (bbox1,bbox2))
+        # or add single box:
+        ok = tracker.add(image, bbox3)
+        init_once = True
+
+    ok, boxes = tracker.update(image)
+    print ok, boxes
+
+    for newbox in boxes:
+        p1 = (int(newbox[0]), int(newbox[1]))
+        p2 = (int(newbox[0] + newbox[2]), int(newbox[1] + newbox[3]))
+        cv2.rectangle(image, p1, p2, (200,0,0))
+
+    cv2.imshow("tracking", image)
+    k = cv2.waitKey(1) & 0xff
+    if k == 27 : break # esc pressed

modules/tracking/samples/tracker.py

+import numpy as np
+import cv2
+
+cv2.namedWindow("tracking")
+camera = cv2.VideoCapture("E:/code/opencv/samples/data/768x576.avi")
+bbox = (638.0,230.0,56.0,101.0)
+tracker = cv2.Tracker_create("MIL")
+init_once = False
+
+while camera.isOpened():
+    ok, image=camera.read()
+    if not ok:
+        print 'no image read'
+        break
+
+    if not init_once:
+        ok = tracker.init(image, bbox)
+        init_once = True
+
+    ok, newbox = tracker.update(image)
+    print ok, newbox
+
+    if ok:
+        p1 = (int(newbox[0]), int(newbox[1]))
+        p2 = (int(newbox[0] + newbox[2]), int(newbox[1] + newbox[3]))
+        cv2.rectangle(image, p1, p2, (200,0,0))
+
+    cv2.imshow("tracking", image)
+    k = cv2.waitKey(1) & 0xff
+    if k == 27 : break # esc pressed
\ No newline at end of file

modules/tracking/src/roiSelector.cpp

@@ -91,7 +91,7 @@ namespace cv {
     return select("ROI selector", img, fromCenter);
   }
 
-  Rect2d ROISelector::select(const std::string& windowName, Mat img, bool showCrossair, bool fromCenter){
+  Rect2d ROISelector::select(const cv::String& windowName, Mat img, bool showCrossair, bool fromCenter){
 
     key=0;
 
@@ -149,7 +149,7 @@ namespace cv {
     return selectorParams.box;
   }
 
-  void ROISelector::select(const std::string& windowName, Mat img, std::vector<Rect2d> & boundingBox, bool fromCenter){
+  void ROISelector::select(const cv::String& windowName, Mat img, std::vector<Rect2d> & boundingBox, bool fromCenter){
     std::vector<Rect2d> box;
     Rect2d temp;
     key=0;
@@ -172,12 +172,12 @@ namespace cv {
     return _selector.select("ROI selector", img, true, fromCenter);
   };
 
-  Rect2d selectROI(const std::string& windowName, Mat img, bool showCrossair, bool fromCenter){
+  Rect2d selectROI(const cv::String& windowName, Mat img, bool showCrossair, bool fromCenter){
     printf("Select an object to track and then press SPACE or ENTER button!\n" );
     return _selector.select(windowName,img, showCrossair, fromCenter);
   };
 
-  void selectROI(const std::string& windowName, Mat img, std::vector<Rect2d> & boundingBox, bool fromCenter){
+  void selectROI(const cv::String& windowName, Mat img, std::vector<Rect2d> & boundingBox, bool fromCenter){
     return _selector.select(windowName, img, boundingBox, fromCenter);
   }