Index: trunk/psLib/src/imageops/psImageCovariance.h
===================================================================
--- trunk/psLib/src/imageops/psImageCovariance.h	(revision 21466)
+++ trunk/psLib/src/imageops/psImageCovariance.h	(revision 23882)
@@ -35,4 +35,11 @@
     );
 
+/// Calculate the covariance pseudo-matrix for binning
+psKernel *psImageCovarianceBin(
+    int bin,                            ///< Binning factor
+    const psKernel *covariance,         ///< Current covariance pseudo-matrix
+    bool average                        ///< Averaging pixels when binning?
+    );
+
 /// Return the pixel-to-pixel covariance factor
 float psImageCovarianceFactor(