Index: trunk/psLib/src/imageops/psImageInterpolate.h
===================================================================
--- trunk/psLib/src/imageops/psImageInterpolate.h	(revision 14452)
+++ trunk/psLib/src/imageops/psImageInterpolate.h	(revision 18162)
@@ -7,6 +7,6 @@
  * @author Paul Price, Institute for Astronomy
  *
- * @version $Revision: 1.3 $ $Name: not supported by cvs2svn $
- * @date $Date: 2007-08-09 01:40:07 $
+ * @version $Revision: 1.4 $ $Name: not supported by cvs2svn $
+ * @date $Date: 2008-06-17 21:24:58 $
  * Copyright 2004-2007 Institute for Astronomy, University of Hawaii
  */
@@ -84,4 +84,12 @@
     );
 
+/// Return the variance factor for the appropriate position
+///
+/// psImageInterpolate sets the variance appropriate for extended regions (on the scale of the interpolation
+/// kernel), but this is not appropriate for pixel-to-pixel statistics.  This function returns the conversion
+/// factor.
+float psImageInterpolateVarianceFactor(float x, float y, ///< Position of interest
+                                       const psImageInterpolateOptions *options ///< Interpolation options
+    );
 
 #endif