Index: trunk/psLib/src/imageops/psImageBackground.h
===================================================================
--- trunk/psLib/src/imageops/psImageBackground.h	(revision 11248)
+++ trunk/psLib/src/imageops/psImageBackground.h	(revision 14922)
@@ -5,6 +5,6 @@
  *  @author EAM, IfA
  *
- *  $Revision: 1.4 $ $Name: not supported by cvs2svn $
- *  $Date: 2007-01-23 22:47:23 $
+ *  $Revision: 1.5 $ $Name: not supported by cvs2svn $
+ *  $Date: 2007-09-20 23:52:52 $
  *  Copyright 2004-2005 IfA, University of Hawaii
  */
@@ -22,4 +22,5 @@
 // Get the background for an image
 bool psImageBackground(psStats *stats, // desired measurement and options
+		       psVector **sample, // vector of data used for analysis
                        const psImage *image, // Image for which to get the background
                        const psImage *mask, // Mask image
@@ -30,2 +31,5 @@
 /// @}
 #endif // #ifndef PS_IMAGE_BACKGROUND_H
+
+/* the user may supply a psVector ** or NULL to sample.  if a vector is supplied,
+   the user must free the resulting vector */