fix bug

model.py

@@ -34,8 +34,21 @@ class TrafficSignDetector:
             torch.load = original_torch_load
 
         self.conf_threshold = config['model']['confidence_threshold']
-        self.box_color = config['inference']['box_color']
-        self.text_color = config['inference']['text_color']
+        
+        # Convert color strings to tuples if needed
+        box_color = config['inference']['box_color']
+        if isinstance(box_color, str):
+            # Convert string "(128, 0, 128)" to tuple (128, 0, 128)
+            self.box_color = tuple(map(int, box_color.strip('()').split(',')))
+        else:
+            self.box_color = box_color
+            
+        text_color = config['inference']['text_color']
+        if isinstance(text_color, str):
+            self.text_color = tuple(map(int, text_color.strip('()').split(',')))
+        else:
+            self.text_color = text_color
+        
         self.thickness = config['inference']['thickness']
         self.classes = config['classes']