From e3bb97370f869397b2e25dec90beeef36f22bb2c Mon Sep 17 00:00:00 2001
From: Théo de la Hogue
Date: Mon, 7 Aug 2023 13:38:32 +0200
Subject: Loading heatmap parameters from JSON for ArFrame. Scaling gaze value
 according ArFrame size and Heatmap size.

---
 src/argaze/ArFeatures.py | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/src/argaze/ArFeatures.py b/src/argaze/ArFeatures.py
index 6727928..03082e6 100644
--- a/src/argaze/ArFeatures.py
+++ b/src/argaze/ArFeatures.py
@@ -99,11 +99,6 @@ class ArFrame():
 		# Init looked aoi data
 		self.__init_looked_aoi_data()
 
-		# Init heatmap if required
-		if self.heatmap:
-
-			self.heatmap.init()
-
 		# Init lock to share looked data wit hmultiples threads
 		self.__look_lock = threading.Lock()
 
@@ -316,11 +311,19 @@ class ArFrame():
 		# Load heatmap
 		try:
 
-			new_heatmap_value = frame_data.pop('heatmap')
+			new_heatmap_data = frame_data.pop('heatmap')
+
+			# Default heatmap size equals frame size
+			if 'size' not in new_heatmap_data.keys():
+
+				new_heatmap_data['size'] = new_frame_size
+
+			new_heatmap = AOIFeatures.Heatmap(**new_heatmap_data)
 
 		except KeyError:
 
-			new_heatmap_value = False
+			new_heatmap_data = {}
+			new_heatmap = None
 
 		# Create frame
 		return ArFrame(new_frame_name, \
@@ -334,7 +337,7 @@ class ArFrame():
 						new_scan_path_analyzers, \
 						new_aoi_scan_path, \
 						new_aoi_scan_path_analyzers, \
-						AOIFeatures.Heatmap(new_frame_size) if new_heatmap_value else None \
+						new_heatmap \
 						)
 
 	@classmethod
@@ -379,7 +382,8 @@ class ArFrame():
 		# Draw heatmap
 		if self.heatmap:
 
-			image = cv2.addWeighted(self.heatmap.image, 0.5, image, 1., 0)
+			heatmap_image = cv2.resize(self.heatmap.image, dsize=(image.shape[1], image.shape[0]), interpolation=cv2.INTER_LINEAR)
+			image = cv2.addWeighted(heatmap_image, 0.5, image, 1., 0)
 
 		# Unlock frame exploitation
 		self.__look_lock.release()
@@ -601,7 +605,11 @@ class ArFrame():
 				# Store heatmap start date
 				heatmap_start = time.time()
 
-				self.heatmap.update(self.__gaze_position.value, sigma=0.05)
+				# Scale gaze position value
+				scale = numpy.array([self.heatmap.size[0] / self.size[0], self.heatmap.size[1] / self.size[1]])
+
+				# Update heatmap image
+				self.heatmap.update(self.__gaze_position.value * scale)
 
 				# Assess heatmap time in ms
 				times['heatmap'] = (time.time() - heatmap_start) * 1e3
-- 
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