Visualization fixes.

exe/FaceLandmarkImg/FaceLandmarkImg.cpp

@@ -192,7 +192,7 @@ int main (int argc, char **argv)
 			// Displaying the tracking visualizations
 			visualizer.SetObservationFaceAlign(sim_warped_img);
 			visualizer.SetObservationHOG(hog_descriptor, num_hog_rows, num_hog_cols);
-			visualizer.SetObservationLandmarks(face_model.detected_landmarks, 1.0); // Set confidence to high to make sure we always visualize
+			visualizer.SetObservationLandmarks(face_model.detected_landmarks, 1.0, face_model.GetVisibilities()); // Set confidence to high to make sure we always visualize
 			visualizer.SetObservationPose(pose_estimate, 1.0);
 			visualizer.SetObservationGaze(gaze_direction0, gaze_direction1, LandmarkDetector::CalculateAllEyeLandmarks(face_model), LandmarkDetector::Calculate3DEyeLandmarks(face_model, image_reader.fx, image_reader.fy, image_reader.cx, image_reader.cy), face_model.detection_certainty);
 

exe/FaceLandmarkVid/FaceLandmarkVid.cpp

@@ -164,7 +164,7 @@ int main (int argc, char **argv)
 
 			// Displaying the tracking visualizations
 			visualizer.SetImage(captured_image, sequence_reader.fx, sequence_reader.fy, sequence_reader.cx, sequence_reader.cy);
-			visualizer.SetObservationLandmarks(face_model.detected_landmarks, face_model.detection_certainty);
+			visualizer.SetObservationLandmarks(face_model.detected_landmarks, face_model.detection_certainty, face_model.GetVisibilities());
 			visualizer.SetObservationPose(pose_estimate, face_model.detection_certainty);
 			visualizer.SetObservationGaze(gazeDirection0, gazeDirection1, LandmarkDetector::CalculateAllEyeLandmarks(face_model), LandmarkDetector::Calculate3DEyeLandmarks(face_model, sequence_reader.fx, sequence_reader.fy, sequence_reader.cx, sequence_reader.cy), face_model.detection_certainty);
 			visualizer.SetFps(fps_tracker.GetFPS());

exe/FeatureExtraction/FeatureExtraction.cpp

@@ -194,7 +194,7 @@ int main (int argc, char **argv)
 			visualizer.SetImage(captured_image, sequence_reader.fx, sequence_reader.fy, sequence_reader.cx, sequence_reader.cy);
 			visualizer.SetObservationFaceAlign(sim_warped_img);
 			visualizer.SetObservationHOG(hog_descriptor, num_hog_rows, num_hog_cols);
-			visualizer.SetObservationLandmarks(face_model.detected_landmarks, face_model.detection_certainty);
+			visualizer.SetObservationLandmarks(face_model.detected_landmarks, face_model.detection_certainty, face_model.GetVisibilities());
 			visualizer.SetObservationPose(pose_estimate, face_model.detection_certainty);
 			visualizer.SetObservationGaze(gazeDirection0, gazeDirection1, LandmarkDetector::CalculateAllEyeLandmarks(face_model), LandmarkDetector::Calculate3DEyeLandmarks(face_model, sequence_reader.fx, sequence_reader.fy, sequence_reader.cx, sequence_reader.cy), face_model.detection_certainty);
 			visualizer.SetFps(fps_tracker.GetFPS());

gui/HeadPose-live/MainWindow.xaml.cs

@@ -417,7 +417,7 @@ namespace HeadPoseLive
                 List<System.Windows.Point> landmarks = new List<System.Windows.Point>();
                 List<Tuple<System.Windows.Point, System.Windows.Point>> gaze_lines = null;
                 Tuple<double, double> gaze_angle = new Tuple<double, double>(0, 0);
-                double scale = 0;
+                double scale = face_model.GetRigidParams()[0];
 
                 if (detectionSucceeding)
                 {
@@ -428,9 +428,7 @@ namespace HeadPoseLive
 
                     eye_landmarks = face_model.CalculateVisibleEyeLandmarks();
 
-                    scale = face_model.GetRigidParams()[0];
+                    gaze_lines = gaze_analyser.CalculateGazeLines(reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
-
-                    gaze_lines = gaze_analyser.CalculateGazeLines(scale, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
                     gaze_angle = gaze_analyser.GetGazeAngle();
 
                     lines = face_model.CalculateBox(reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());

gui/OpenFaceDemo/MainWindow.xaml.cs

@@ -251,7 +251,7 @@ namespace OpenFaceDemo
                     landmarks = landmark_detector.CalculateVisibleLandmarks();
                     eye_landmarks = landmark_detector.CalculateVisibleEyeLandmarks();
                     lines = landmark_detector.CalculateBox(reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
-                    gaze_lines = gaze_analyser.CalculateGazeLines(scale, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
+                    gaze_lines = gaze_analyser.CalculateGazeLines(reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
                 }
 
                 // Visualisation

gui/OpenFaceOffline/MainWindow.xaml

@@ -64,7 +64,7 @@
             <Label></Label>
         </Border>
         <Border Name="VideoBorder" Grid.Row="1" Grid.Column="0" BorderBrush="Black" BorderThickness="1" Background="LightGray" Margin="5,5,0,0">
-            <OpenFaceOffline:OverlayImage x:Name="video" />
+            <OpenFaceOffline:OverlayImage x:Name="overlay_image" />
         </Border>
 
         <GroupBox Name="AppearanceBorder" Grid.Row="1" Grid.Column="1" BorderBrush="Black" BorderThickness="1" MinHeight="100">

gui/OpenFaceOffline/MainWindow.xaml.cs

@@ -224,7 +224,7 @@ namespace OpenFaceOffline
                 gaze_analyser.AddNextFrame(landmark_detector, detection_succeeding, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
 
                 // Only the final face will contain the details
-                VisualizeFeatures(frame, visualizer_of, landmark_detector.CalculateAllLandmarks(), detection_succeeding, true, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy(), progress);
+                VisualizeFeatures(frame, visualizer_of, landmark_detector.CalculateAllLandmarks(), landmark_detector.GetVisibilities(), detection_succeeding, true, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy(), progress);
 
                 // Record an observation
                 RecordObservation(recorder, visualizer_of.GetVisImage(), detection_succeeding, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy(), reader.GetTimestamp());
@@ -237,8 +237,6 @@ namespace OpenFaceOffline
                 if (skip_frames > 0)
                     skip_frames--;
 
-                latest_img = null;
-
                 frame = new RawImage(reader.GetNextImage());
                 gray_frame = new RawImage(reader.GetCurrentFrameGray());
 
@@ -330,15 +328,13 @@ namespace OpenFaceOffline
                     gaze_analyser.AddNextFrame(landmark_detector, detection_succeeding, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
 
                     // Only the final face will contain the details
-                    VisualizeFeatures(frame, visualizer_of, landmarks, detection_succeeding, i == 0, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy(), progress);
+                    VisualizeFeatures(frame, visualizer_of, landmarks, landmark_detector.GetVisibilities(), detection_succeeding, i == 0, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy(), progress);
 
                     // Record an observation
                     RecordObservation(recorder, visualizer_of.GetVisImage(), detection_succeeding, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy(), 0);
 
                 }
 
-                latest_img = null;
-
                 frame = new RawImage(reader.GetNextImage());
                 gray_frame = new RawImage(reader.GetCurrentFrameGray());
 
@@ -398,7 +394,7 @@ namespace OpenFaceOffline
 
         }
 
-        private void VisualizeFeatures(RawImage frame, Visualizer visualizer, List<Tuple<double, double>> landmarks, bool detection_succeeding, 
+        private void VisualizeFeatures(RawImage frame, Visualizer visualizer, List<Tuple<double, double>> landmarks, List<bool> visibilities, bool detection_succeeding, 
             bool new_image, float fx, float fy, float cx, float cy, double progress)
         {
 
@@ -418,27 +414,24 @@ namespace OpenFaceOffline
             else if (confidence > 1)
                 confidence = 1;
 
-            double scale = 0;
+            double scale = landmark_detector.GetRigidParams()[0];
 
             // Helps with recording and showing the visualizations
-            if(new_image)
+            if (new_image)
             {
                 visualizer.SetImage(frame, fx, fy, cx, cy);
             }
             visualizer.SetObservationHOG(face_analyser.GetLatestHOGFeature(), face_analyser.GetHOGRows(), face_analyser.GetHOGCols());
-            visualizer.SetObservationLandmarks(landmarks, confidence); // Set confidence to high to make sure we always visualize
+            visualizer.SetObservationLandmarks(landmarks, confidence, visibilities);
             visualizer.SetObservationPose(pose, confidence);
             visualizer.SetObservationGaze(gaze_analyser.GetGazeCamera().Item1, gaze_analyser.GetGazeCamera().Item2, landmark_detector.CalculateAllEyeLandmarks(), landmark_detector.CalculateAllEyeLandmarks3D(fx, fy, cx, cy), confidence);
 
             if (detection_succeeding)
             {                
-                
                 eye_landmarks = landmark_detector.CalculateVisibleEyeLandmarks();
                 lines = landmark_detector.CalculateBox(fx, fy, cx, cy);
 
-                scale = landmark_detector.GetRigidParams()[0];
+                gaze_lines = gaze_analyser.CalculateGazeLines(fx, fy, cx, cy);
-
-                gaze_lines = gaze_analyser.CalculateGazeLines(scale, fx, fy, cx, cy);
                 gaze_angle = gaze_analyser.GetGazeAngle();
             }
 
@@ -490,25 +483,26 @@ namespace OpenFaceOffline
 
                 if (ShowTrackedVideo)
                 {
-                    if (latest_img == null)
+                    if (new_image)
                     {
                         latest_img = frame.CreateWriteableBitmap();
                     }
                     
                     frame.UpdateWriteableBitmap(latest_img);
 
-                    video.Source = latest_img;
+                    overlay_image.Source = latest_img;
-                    video.Confidence = confidence;
+                    overlay_image.Confidence = confidence;
-                    video.FPS = processing_fps.GetFPS();
+                    overlay_image.FPS = processing_fps.GetFPS();
-                    video.Progress = progress;
+                    overlay_image.Progress = progress;
-                    video.FaceScale = scale;
+                    overlay_image.FaceScale = scale;
 
                     if (!detection_succeeding)
                     {
-                        video.OverlayLines.Clear();
+                        overlay_image.OverlayLines.Clear();
-                        video.OverlayPoints.Clear();
+                        overlay_image.OverlayPoints.Clear();
-                        video.OverlayEyePoints.Clear();
+                        overlay_image.OverlayPointsVisibility.Clear();
-                        video.GazeLines.Clear();
+                        overlay_image.OverlayEyePoints.Clear();
+                        overlay_image.GazeLines.Clear();
                     }
                     else
                     {
@@ -528,18 +522,20 @@ namespace OpenFaceOffline
 
                         if (new_image)
                         {
-                            video.OverlayLines = lines;
+                            overlay_image.OverlayLines = lines;
-                            video.OverlayPoints = landmark_points;
+                            overlay_image.OverlayPoints = landmark_points;
-                            video.OverlayEyePoints = eye_landmark_points;
+                            overlay_image.OverlayPointsVisibility = visibilities;
-                            video.GazeLines = gaze_lines;
+                            overlay_image.OverlayEyePoints = eye_landmark_points;
+                            overlay_image.GazeLines = gaze_lines;
                         }
                         else
                         {
                             // In case of multiple faces just add them to the existing drawing list
-                            video.OverlayLines.AddRange(lines.GetRange(0, lines.Count));
+                            overlay_image.OverlayLines.AddRange(lines.GetRange(0, lines.Count));
-                            video.OverlayPoints.AddRange(landmark_points.GetRange(0, landmark_points.Count));
+                            overlay_image.OverlayPoints.AddRange(landmark_points.GetRange(0, landmark_points.Count));
-                            video.OverlayEyePoints.AddRange(eye_landmark_points.GetRange(0, eye_landmark_points.Count));
+                            overlay_image.OverlayPointsVisibility.AddRange(visibilities.GetRange(0, visibilities.Count));
-                            video.GazeLines.AddRange(gaze_lines.GetRange(0, gaze_lines.Count));
+                            overlay_image.OverlayEyePoints.AddRange(eye_landmark_points.GetRange(0, eye_landmark_points.Count));
+                            overlay_image.GazeLines.AddRange(gaze_lines.GetRange(0, gaze_lines.Count));
                         }
                     }
                 }
@@ -626,7 +622,7 @@ namespace OpenFaceOffline
                 NextFrameButton.IsEnabled = false;
 
                 // Clean up the interface itself
-                video.Source = null;
+                overlay_image.Source = null;
                 
                 auClassGraph.Update(new Dictionary<string, double>());
                 auRegGraph.Update(new Dictionary<string, double>());

gui/OpenFaceOffline/UI_items/OverlayImage.xaml.cs

@@ -75,6 +75,7 @@ namespace OpenFaceOffline
             InitializeComponent();
             OverlayLines = new List<Tuple<Point, Point>>();
             OverlayPoints = new List<Point>();
+            OverlayPointsVisibility = new List<bool>();
             OverlayEyePoints = new List<Point>();
             GazeLines = new List<Tuple<Point, Point>>();
 
@@ -91,6 +92,9 @@ namespace OpenFaceOffline
             if (OverlayPoints == null)
                 OverlayPoints = new List<Point>();
 
+            if (OverlayPointsVisibility == null)
+                OverlayPointsVisibility = new List<bool>();
+
             if (OverlayEyePoints == null)
                 OverlayEyePoints = new List<Point>();
 
@@ -122,17 +126,29 @@ namespace OpenFaceOffline
                 var p1 = new Point(ActualWidth * line.Item1.X / width, ActualHeight * line.Item1.Y / height);
                 var p2 = new Point(ActualWidth * line.Item2.X / width, ActualHeight * line.Item2.Y / height);
 
-                dc.DrawLine(new Pen(new SolidColorBrush(Color.FromArgb(200, (byte)(240), (byte)(30), (byte)100)), 3.0 * scaling_p), p1, p2);
+                var dir = p2 - p1;
+                p2 = p1 + dir * scaling_p * 2;
+                dc.DrawLine(new Pen(new SolidColorBrush(Color.FromArgb(200, (byte)(240), (byte)(30), (byte)100)), 6.0 * scaling_p), p1, p2);
 
             }
 
-            foreach (var p in OverlayPoints)
+            for (int i = 0; i < OverlayPoints.Count; ++i)
             {
+                var p = OverlayPoints[i];
 
                 var q = new Point(ActualWidth * p.X / width, ActualHeight * p.Y / height);
 
-                dc.DrawEllipse(new SolidColorBrush(Color.FromArgb((byte)(230 * Confidence), 255, 50, 50)), null, q, 2.75 * scaling_p, 2.75 * scaling_p);
+                if(OverlayPointsVisibility.Count == 0 || OverlayPointsVisibility[i])
-                dc.DrawEllipse(new SolidColorBrush(Color.FromArgb((byte)(230 * Confidence), 255, 255, 100)), null, q, 1.75 * scaling_p, 1.75 * scaling_p);
+                { 
+                    dc.DrawEllipse(new SolidColorBrush(Color.FromArgb((byte)(230 * Confidence), 255, 50, 50)), null, q, 2.75 * scaling_p, 3.0 * scaling_p);
+                    dc.DrawEllipse(new SolidColorBrush(Color.FromArgb((byte)(230 * Confidence), 255, 255, 100)), null, q, 1.75 * scaling_p, 2.0 * scaling_p);
+                }
+                else
+                {
+                    // Draw fainter if landmark not visible
+                    dc.DrawEllipse(new SolidColorBrush(Color.FromArgb((byte)(125 * Confidence), 255, 50, 50)), null, q, 2.75 * scaling_p, 3.0 * scaling_p);
+                    dc.DrawEllipse(new SolidColorBrush(Color.FromArgb((byte)(125 * Confidence), 255, 255, 100)), null, q, 1.75 * scaling_p, 2.0 * scaling_p);
+                }
             }
 
             for (int id = 0; id < OverlayEyePoints.Count; id++)
@@ -199,6 +215,7 @@ namespace OpenFaceOffline
         public List<Tuple<Point, Point>> OverlayLines { get; set; }
         public List<Tuple<Point, Point>> GazeLines { get; set; }
         public List<Point> OverlayPoints { get; set; }
+        public List<bool> OverlayPointsVisibility { get; set; }
         public List<Point> OverlayEyePoints { get; set; }
         public double Confidence { get; set; }
         public double FPS { get; set; }

lib/local/CppInerop/GazeAnalyserInterop.h

@@ -152,18 +152,18 @@ namespace GazeAnalyser_Interop {
 			return gaze_angle;
 
 		}
-		System::Collections::Generic::List<System::Tuple<System::Windows::Point, System::Windows::Point>^>^ CalculateGazeLines(double scale, float fx, float fy, float cx, float cy)
+		System::Collections::Generic::List<System::Tuple<System::Windows::Point, System::Windows::Point>^>^ CalculateGazeLines(float fx, float fy, float cx, float cy)
 		{
 
 			cv::Mat_<double> cameraMat = (cv::Mat_<double>(3, 3) << fx, 0, cx, 0, fy, cy, 0, 0, 0);
 
 			vector<cv::Point3f> points_left;
 			points_left.push_back(cv::Point3f(*pupil_left));
-			points_left.push_back(cv::Point3f(*pupil_left + *gazeDirection0 * 40.0 * scale));
+			points_left.push_back(cv::Point3f(*pupil_left + *gazeDirection0 * 40.0));
 
 			vector<cv::Point3f> points_right;
 			points_right.push_back(cv::Point3f(*pupil_right));
-			points_right.push_back(cv::Point3f(*pupil_right + *gazeDirection1 * 40.0 * scale));
+			points_right.push_back(cv::Point3f(*pupil_right + *gazeDirection1 * 40.0));
 
 			// Perform manual projection of points
 			vector<cv::Point2d> imagePoints_left;

lib/local/CppInerop/LandmarkDetectorInterop.h

@@ -227,6 +227,19 @@ namespace CppInterop {
 				}
 			}
 	
+			// Get the mask of which landmarks are currently visible (not self-occluded)
+			List<bool>^ GetVisibilities()
+			{
+				cv::Mat_<int> vis = clnf->GetVisibilities();
+				List<bool>^ visibilities = gcnew List<bool>();
+
+				for (auto vis_it = vis.begin(); vis_it != vis.end(); vis_it++)
+				{
+					visibilities->Add(*vis_it != 0);
+				}
+				return visibilities;
+			}
+
 			List<System::Tuple<double,double>^>^ CalculateVisibleLandmarks() {
 				vector<cv::Point2d> vecLandmarks = ::LandmarkDetector::CalculateVisibleLandmarks(*clnf);
 				

lib/local/CppInerop/VisualizerInterop.h

@@ -100,7 +100,7 @@ namespace UtilitiesOF {
 			m_visualizer->SetObservationHOG(observation_HOG->Mat, num_cols, num_rows);
 		}
 
-		void SetObservationLandmarks(List<System::Tuple<double, double>^>^ landmarks_2D, double confidence)
+		void SetObservationLandmarks(List<System::Tuple<double, double>^>^ landmarks_2D, double confidence, List<bool>^ visibilities)
 		{
 			// Construct an OpenCV matrix from the landmarks
 			cv::Mat_<double> landmarks_2D_mat(landmarks_2D->Count * 2, 1, 0.0);
@@ -109,8 +109,27 @@ namespace UtilitiesOF {
 				landmarks_2D_mat.at<double>(i, 0) = landmarks_2D[i]->Item1;
 				landmarks_2D_mat.at<double>(i + landmarks_2D->Count, 0) = landmarks_2D[i]->Item2;
 			}
-			// TODO add visibilities
+
-			m_visualizer->SetObservationLandmarks(landmarks_2D_mat, confidence);
+			// Construct an OpenCV matrix from the landmarks
+			cv::Mat_<int> visibilities_cv(visibilities->Count, 1, 0);
+			for (int i = 0; i < visibilities->Count; ++i)
+			{
+				if (visibilities[i])
+				{
+					visibilities_cv.at<int>(i, 0) = 1;
+				}
+				else
+				{
+					visibilities_cv.at<int>(i, 0) = 0;
+				}
+			}
+
+			m_visualizer->SetObservationLandmarks(landmarks_2D_mat, confidence, visibilities_cv);
+		}
+
+		void SetObservationLandmarks(List<System::Tuple<double, double>^>^ landmarks_2D, double confidence)
+		{
+			SetObservationLandmarks(landmarks_2D, confidence, gcnew List<bool>());
 		}
 
 		void SetImage(OpenCVWrappers::RawImage^ canvas, float fx, float fy, float cx, float cy)

lib/local/LandmarkDetector/include/LandmarkDetectorModel.h

@@ -159,6 +159,9 @@ public:
 	// A utility bounding box function
 	cv::Rect_<double> GetBoundingBox() const;
 
+	// Get the currently non-self occluded landmarks
+	cv::Mat_<int> GetVisibilities() const;
+
 	// Reset the model (useful if we want to completelly reinitialise, or we want to track another video)
 	void Reset();
 

lib/local/LandmarkDetector/src/LandmarkDetectorModel.cpp

@@ -1146,6 +1146,17 @@ cv::Mat_<double> CLNF::GetShape(double fx, double fy, double cx, double cy) cons
 
 }
 
+cv::Mat_<int> CLNF::GetVisibilities() const
+{
+	// Get the view of the largest scale
+	int scale = patch_experts.visibilities.size() - 1;
+	int view_id = patch_experts.GetViewIdx(params_global, scale);
+
+	cv::Mat_<int> visibilities_to_ret = this->patch_experts.visibilities[scale][view_id].clone();
+	return visibilities_to_ret;
+}
+
+
 // A utility bounding box function
 cv::Rect_<double> CLNF::GetBoundingBox() const
 {

lib/local/Utilities/src/Visualizer.cpp

@@ -157,6 +157,19 @@ void Visualizer::SetObservationLandmarks(const cv::Mat_<double>& landmarks_2D, d
 				cv::circle(captured_image, featurePoint, 1 * draw_multiplier, cv::Scalar(255, 0, 0), thickness_2, CV_AA, draw_shiftbits);
 
 			}
+			else
+			{
+				// Draw a fainter point if the landmark is self occluded
+				cv::Point featurePoint(cvRound(landmarks_2D.at<double>(i) * (double)draw_multiplier), cvRound(landmarks_2D.at<double>(i + n) * (double)draw_multiplier));
+
+				// A rough heuristic for drawn point size
+				int thickness = (int)std::ceil(2.5* ((double)captured_image.cols) / 640.0);
+				int thickness_2 = (int)std::ceil(1.0* ((double)captured_image.cols) / 640.0);
+
+				cv::circle(captured_image, featurePoint, 1 * draw_multiplier, cv::Scalar(0, 0, 155), thickness, CV_AA, draw_shiftbits);
+				cv::circle(captured_image, featurePoint, 1 * draw_multiplier, cv::Scalar(155, 0, 0), thickness_2, CV_AA, draw_shiftbits);
+
+			}
 		}
 	}
 }