diff --git a/src/analyzer/corners.py b/src/analyzer/corners.py
--- a/src/analyzer/corners.py
+++ b/src/analyzer/corners.py
@@ -6,8 +6,8 @@ log=logging.getLogger(__name__)
 
 
 class Corners:
-	def __init__(self):
-		self._corners=[]
+	def __init__(self,cornerList=[]):
+		self._corners=cornerList[:]
 
 	## Adds a new corner if there are less than four, replaces the closest otherwise.
 	def add(self,x,y):