Face recognition improvements (#17387)

* Increase frequency of updates when internal face detection is used

* Adjust number of required faces based on detection type

* Adjust min_score config to unknown_score

* Only for person

* Improve typing

* Update face rec docs

* Cleanup ui colors

* Cleanup

frigate/data_processing/common/face/model.py

@@ -164,9 +164,7 @@ class LBPHRecognizer(FaceRecognizer):
             return
 
         self.recognizer: cv2.face.LBPHFaceRecognizer = (
-            cv2.face.LBPHFaceRecognizer_create(
-                radius=2, threshold=(1 - self.config.face_recognition.min_score) * 1000
-            )
+            cv2.face.LBPHFaceRecognizer_create(radius=2, threshold=400)
         )
         self.recognizer.train(faces, np.array(labels))
 
@@ -243,6 +241,8 @@ class ArcFaceRecognizer(FaceRecognizer):
         for name, embs in face_embeddings_map.items():
             self.mean_embs[name] = stats.trim_mean(embs, 0.15)
 
+        logger.debug("Finished building ArcFace model")
+
     def similarity_to_confidence(
         self, cosine_similarity: float, median=0.3, range_width=0.6, slope_factor=12
     ):
@@ -302,7 +302,4 @@ class ArcFaceRecognizer(FaceRecognizer):
                 score = confidence
                 label = name
 
-        if score < self.config.face_recognition.min_score:
-            return None
-
         return label, round(score * blur_factor, 2)