From 861d427355b7c086f73fd14661dac880abfdf05a Mon Sep 17 00:00:00 2001
From: Théo de la Hogue
Date: Tue, 16 May 2023 19:21:17 +0200
Subject: Using new AOIFrame class and point_spread method to draw heatmap.

---
 src/argaze/utils/demo_gaze_features_run.py | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/src/argaze/utils/demo_gaze_features_run.py b/src/argaze/utils/demo_gaze_features_run.py
index 6294527..3fb664c 100644
--- a/src/argaze/utils/demo_gaze_features_run.py
+++ b/src/argaze/utils/demo_gaze_features_run.py
@@ -6,6 +6,7 @@ import time
 import threading
 
 from argaze import ArFeatures, GazeFeatures
+from argaze.AreaOfInterest import AOIFeatures
 from argaze.GazeAnalysis import *
 
 import cv2
@@ -48,6 +49,11 @@ def main():
 
     # Init gaze processing
     gaze_position = GazeFeatures.GazePosition()
+
+    screen_frame = AOIFeatures.AOIFrame(aoi_scene_projection['Screen'], window_size)
+    gaze_spread_sum = numpy.zeros((aoi_scene_image.shape[0], aoi_scene_image.shape[1]))
+    heatmap_matrix = numpy.zeros(aoi_scene_image.shape, dtype=numpy.uint8)
+
     gaze_movement_identifier = {
         'I-DT': DispersionThresholdIdentification.GazeMovementIdentifier(args.deviation_max_threshold, args.duration_min_threshold),
         'I-VT': VelocityThresholdIdentification.GazeMovementIdentifier(args.velocity_max_threshold, args.duration_min_threshold)
@@ -77,6 +83,8 @@ def main():
     def on_mouse_event(event, x, y, flags, param):
 
         nonlocal gaze_position
+        nonlocal gaze_spread_sum
+        nonlocal heatmap_matrix
         nonlocal tpm_analysis
         nonlocal raw_cK_analysis
         nonlocal aoi_cK_analysis
@@ -94,6 +102,11 @@ def main():
         # Lock gaze movement exploitation
         gaze_movement_lock.acquire()
 
+        # Edit heatmap
+        gaze_spread_sum += screen_frame.point_spread(gaze_position.value, sigma=0.05)
+        heatmap_gray = (255 * gaze_spread_sum / numpy.max(gaze_spread_sum)).astype(numpy.uint8)
+        heatmap_matrix = cv2.applyColorMap(heatmap_gray, cv2.COLORMAP_JET)
+
         # Identify gaze movement accordding select identification mode
         gaze_movement = gaze_movement_identifier[identification_mode].identify(data_ts, gaze_position)
 
@@ -112,8 +125,6 @@ def main():
                         look_at = name
                         break
 
-            
-
             # Append fixation to raw scan path
             raw_scan_path.append_fixation(data_ts, gaze_movement)
 
@@ -162,12 +173,16 @@ def main():
 
             aoi_matrix = aoi_scene_image.copy()
 
+            # Lock gaze movement identification
+            gaze_movement_lock.acquire()
+
+            # Draw gaze spread heatmap
+            aoi_matrix = cv2.addWeighted(heatmap_matrix, 0.5, aoi_matrix, 1., 0)
+            #aoi_matrix = numpy.maximum(aoi_matrix, heatmap_matrix)
+
             # Write identification mode
             cv2.putText(aoi_matrix, f'Gaze movement identification mode: {identification_mode} (Press \'m\' key to switch)', (20, 40), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 255), 1, cv2.LINE_AA)
                 
-            # Lock gaze movement identification
-            gaze_movement_lock.acquire()
-         
             # Check fixation identification
             if gaze_movement_identifier[identification_mode].current_fixation != None:
 
@@ -260,6 +275,10 @@ def main():
 
                 cv2.putText(aoi_matrix, f'AOI: Focal attention', (20, window_size[1]-80), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 0), 1, cv2.LINE_AA)
             
+            ### TEST: GazePosition Heatmap
+
+            ##############################
+
             # Unlock gaze movement identification
             gaze_movement_lock.release()
 
-- 
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