From 07d73e1123e086d0b1479b32ab692f61e03ee5cf Mon Sep 17 00:00:00 2001
From: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>
Date: Fri, 11 Oct 2024 12:03:41 -0500
Subject: [PATCH] Catch possible edge case in stddev calc

---
 frigate/embeddings/util.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/frigate/embeddings/util.py b/frigate/embeddings/util.py
index 0b2acd4d6..3d7605057 100644
--- a/frigate/embeddings/util.py
+++ b/frigate/embeddings/util.py
@@ -20,7 +20,7 @@ class ZScoreNormalization:
 
     @property
     def stddev(self):
-        return math.sqrt(self.variance)
+        return math.sqrt(self.variance) if self.variance > 0 else 0.0
 
     def normalize(self, distances: list[float]):
         self._update(distances)