diff --git a/ar_tag_pose/detector_board_main.py b/ar_tag_pose/detector_board_main.py
index 6b4da8e..38b5bfc 100644
--- a/ar_tag_pose/detector_board_main.py
+++ b/ar_tag_pose/detector_board_main.py
@@ -70,13 +70,14 @@ class Detector(abc.ABC):
 		return f"{RESULTS_FOLDER}/{self.camera_name}_cal.npz"
 
 	def _get_params_filename(self):
-		return f"{RESULTS_FOLDER}/{self.params["name"]}.json"
+		return f"{RESULTS_FOLDER}/{self.name}.json"
 
 	def _get_camera_name(self):
-		camera_name = "default"
-		if self.cap is not None:
-			backends = {'V4L2': cv.CAP_V4L}
-			cameras = enumerate_cameras(backends[self.cap.getBackendName()])
+		camera_name = self.name
+		backend_name = self.cap.getBackendName()
+		if 'V4L2' in backend_name:
+			backends = {backend_name: cv.CAP_V4L}
+			cameras = enumerate_cameras(backends[backend_name])
 
 			for cam in cameras:
 				if cam.index == self.device_id: