Index: trunk/ippconfig/recipes/ppStack.config
===================================================================
--- trunk/ippconfig/recipes/ppStack.config	(revision 34848)
+++ trunk/ippconfig/recipes/ppStack.config	(revision 34849)
@@ -103,4 +103,5 @@
 STACK.TYPE      STR     DEEP_STACK
 
+DO.LINEAR.INPUT.SCALING      BOOL        FALSE
 DEFAULT.EXPTIME  F32    NAN
 
Index: trunk/ppStack/src/ppStack.h
===================================================================
--- trunk/ppStack/src/ppStack.h	(revision 34848)
+++ trunk/ppStack/src/ppStack.h	(revision 34849)
@@ -117,4 +117,5 @@
 bool ppStackCombineBackground(ppStackThreadData *stack, ppStackOptions *options, pmConfig *config);
 bool ppStackCombineMedian(ppStackThreadData *stack, ppStackOptions *options, pmConfig *config);
+bool ppStackLinearScale(psArray *inputs, pmConfig *config);
 
 // Return software version