Fixed #11. Added confidence calculation based on number of fused points.

CMT.cpp

@@ -105,6 +105,9 @@ void CMT::initialize(const Mat im_gray, const Rect rect)
         classes_active = classes_fg;
     }
 
+	//Store initial set of keypoints for confidence calculation
+	points_initial = points_active;
+
     FILE_LOG(logDEBUG) << "CMT::initialize() return";
 }
 
@@ -192,6 +195,9 @@ void CMT::processFrame(Mat im_gray) {
     //TODO: Use theta to suppress result
     bb_rot = RotatedRect(center,  size_initial * scale, rotation/CV_PI * 180);
 
+	// Compute tracking confidence
+	confidence = (float)points_fused.size() / points_initial.size();
+
     //Remember current image
     im_prev = im_gray;
 

CMT.h

@@ -36,12 +36,14 @@ class CMT
 
     vector<Point2f> points_active; //public for visualization purposes
     RotatedRect bb_rot;
+	float confidence;
 
 private:
     Ptr<FeatureDetector> detector;
     Ptr<DescriptorExtractor> descriptor;
 
     Size2f size_initial;
+	vector<Point2f> points_initial;
 
     vector<int> classes_active;