diff --git a/cam_pose.py b/cam_pose.py
index a6dcf93..21f13f8 100644
--- a/cam_pose.py
+++ b/cam_pose.py
@@ -77,7 +77,7 @@ def process_still():
 def process_img(img, criteria, objp, axis, mtx, dist):	# Load previously saved data
 	pattern_size = (7, 6)
 	gray = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
-	ret, corners = cv.findChessboardCorners(gray, pattern_size, corners=None, flags=cv.CALIB_CB_ADAPTIVE_THRESH+cv.CALIB_CB_NORMALIZE_IMAGE)
+	ret, corners = cv.findChessboardCorners(gray, pattern_size, corners=None, flags=cv.CALIB_CB_ADAPTIVE_THRESH+cv.CALIB_CB_NORMALIZE_IMAGE+cv.CALIB_CB_FAST_CHECK)
 	cv.drawChessboardCorners(img, corners=corners, patternSize=pattern_size, patternWasFound=ret)
 
 	if ret: