Index: trunk/ippconfig/recipes/ppSub.config
===================================================================
--- trunk/ippconfig/recipes/ppSub.config	(revision 24845)
+++ trunk/ippconfig/recipes/ppSub.config	(revision 24861)
@@ -18,4 +18,5 @@
 MASK.POOR       STR	CONV.POOR	# Mask value to give poor pixels
 
+LOW.THRESHOLD	F32	4.0	        # Mask pixels below this threshold (std dev)
 POOR.FRACTION	F32	0.10		# Maximum fraction of bad weight for poor pixels
 BADFRAC		F32	0.95		# Maximum fraction of bad pixels