Index: trunk/ppSub/src/ppSubArguments.c
===================================================================
--- trunk/ppSub/src/ppSubArguments.c	(revision 14364)
+++ trunk/ppSub/src/ppSubArguments.c	(revision 14457)
@@ -179,5 +179,5 @@
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-refweight", 0, "Referenceweight image", NULL);
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-stats", 0, "Statistics file", NULL);
-
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-region", 0, "Size of iso-kernel region", NAN);
     psMetadataAddS32(arguments, PS_LIST_TAIL, "-size", 0, "Kernel half-size (pixels)", 0);
     psMetadataAddS32(arguments, PS_LIST_TAIL, "-order", 0, "Spatial polynomial order", -1);
@@ -232,4 +232,5 @@
     }
 
+    VALUE_ARG_RECIPE_FLOAT("-region",     "REGION.SIZE",     F32);
     VALUE_ARG_RECIPE_INT("-size",         "KERNEL.SIZE",     S32, 0);
     VALUE_ARG_RECIPE_INT("-order",        "SPATIAL.ORDER",   S32, -1);