diff --git a/hmi/scripts/qr_code_decoder b/hmi/scripts/qr_code_decoder
index 94702da..8dbe421 100755
--- a/hmi/scripts/qr_code_decoder
+++ b/hmi/scripts/qr_code_decoder
@@ -24,13 +24,10 @@ def validate_image(qr_image: ndarray, qr_code_rect: tuple, threshold_percentage:
     x, y, w, h = qr_code_rect  # Coordinates of the bounding box around the QR code
 
     # Calculate the area of the QR code
-    qr_code_area = w * h
-
-    # Calculate the total area of the image
-    total_image_area = qr_image.shape[0] * qr_image.shape[1]
+    qr_code_area: int = w * h
 
     # Calculate the percentage of the screen occupied by the QR code
-    qr_code_percentage = (qr_code_area / total_image_area) * 100
+    qr_code_percentage = (qr_code_area / qr_image.size) * 100
 
     # Check if the QR code occupies at least threshold_percentage of the screen
     if qr_code_percentage >= threshold_percentage: