Adding a dedicated FPS tracker.

lib/local/Utilities/include/VisualizationUtils.h

@@ -37,13 +37,13 @@
 #include <opencv2/core/core.hpp>
 
 #include <vector>
+#include <queue>
 
 namespace Utilities
 {
 
 	// TODO draw AU results
 
-
 	// Drawing a bounding box around the face in an image
 	void DrawBox(cv::Mat image, cv::Vec6d pose, cv::Scalar color, int thickness, float fx, float fy, float cx, float cy);
 	void DrawBox(const std::vector<std::pair<cv::Point2d, cv::Point2d>>& lines, cv::Mat image, cv::Scalar color, int thickness);
@@ -53,6 +53,24 @@ namespace Utilities
 
 	void Visualise_FHOG(const cv::Mat_<double>& descriptor, int num_rows, int num_cols, cv::Mat& visualisation);
 
+	class FpsTracker
+	{
+	public:
+		
+		double history_length;
+
+		void AddFrame();
+
+		double GetFPS();
+
+		FpsTracker();
+
+	private:
+		std::queue<double> frame_times;
+
+		void DiscardOldFrames();
+
+	};
 
 }
 #endif