adding black background to messages

app.py

@@ -55,20 +55,28 @@ def add_border(frame, color = (255, 0, 0), thickness = 2):
     
     return bordered_image 
     
-def overlay_text_on_image(image, text_list, font=cv2.FONT_HERSHEY_SIMPLEX, font_size=0.5, font_thickness=1, margin=10, color=(255, 255, 255)):
-    relative = min(image.shape[0],image.shape[1])
-    y0, dy = margin, int(relative*0.1) # start y position and line gap
+
+
+def overlay_text_on_image(image, text_list, font=cv2.FONT_HERSHEY_SIMPLEX, font_size=0.5, font_thickness=1, margin=10, color=(255, 255, 255), box_color=(0,0,0)):
+    relative = min(image.shape[0], image.shape[1])
+    y0, dy = margin, int(relative*0.1)  # start y position and line gap
+    
     for i, line in enumerate(text_list):
         y = y0 + i * dy
-        if 'Shark' in line or 'Human' in line :
-            text_width, _ = cv2.getTextSize(line, font, font_size*1.5, font_thickness)[0]
-            cv2.putText(image, line, (image.shape[1] - text_width - margin, y), font, font_size*1.2, color, font_thickness, lineType=cv2.LINE_AA)
+        if 'Shark' in line or 'Human' in line:
+            current_font_size = font_size * 1.5
+            text_width, text_height = cv2.getTextSize(line, font, current_font_size, font_thickness)[0]
+            cv2.rectangle(image, (image.shape[1] - text_width - margin - 5, y - text_height), (image.shape[1] - margin + 5, y + 5), box_color, -1)
+            cv2.putText(image, line, (image.shape[1] - text_width - margin, y), font, current_font_size, color, font_thickness, lineType=cv2.LINE_AA)
         else:
-            text_width, _ = cv2.getTextSize(line, font, font_size, font_thickness)[0]
-            cv2.putText(image, line, (image.shape[1] - text_width - margin, y), font, font_size, color, font_thickness, lineType=cv2.LINE_AA)
+            current_font_size = font_size
+            text_width, text_height = cv2.getTextSize(line, font, current_font_size, font_thickness)[0]
+            cv2.rectangle(image, (image.shape[1] - text_width - margin - 5, y - text_height), (image.shape[1] - margin + 5, y + 5), box_color, -1)
+            cv2.putText(image, line, (image.shape[1] - text_width - margin, y), font, current_font_size, color, font_thickness, lineType=cv2.LINE_AA)
             
     return image
 
+
 def overlay_logo(frame,logo, position=(10, 10)):
     """
     Overlay a transparent logo (with alpha channel) on a frame.