Update app.py

app.py

@@ -41,14 +41,14 @@ class DatasetCollectionApp:
         # Restore database before initializing
         self._restore_database()
 
-        self.detector = DogDetector(device=device)
+        self.detector = DogDetector(device=self.device)
         self.tracker = DeepSORTTracker(
             max_iou_distance=0.5,
             max_age=90,
             n_init=1,
             use_appearance=True
         )
-        self.reid = SimplifiedReID(device=device)
+        self.reid = SimplifiedReID(device=self.device)
         self.db = DogDatabase('dog_monitoring.db')
 
         # Temporary session storage (in-memory)