Added missing imports.

src/facebias/detectors/mediapipe.py

@@ -1,9 +1,11 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+import numpy as np
 from facebias import FaceBox
 from facebias.detectors import BaseFaceDetector, NoFaceDetectedError
 
+import mediapipe as mp
 from mediapipe.tasks.python import BaseOptions, vision
 
 
@@ -55,9 +57,10 @@ class MediapipeDetector(BaseFaceDetector):
 
 
 if __name__ == '__main__':
-    import cv2
     from pathlib import Path
 
+    import cv2
+
     TEST_IM_PATH = Path("data/frll_neutral_front/001_03.jpg")
     DETECTOR_PATH = Path("models/blaze_face_short_range.tflite")