Index: /trunk/psphot/src/psphotImageMedian.c
===================================================================
--- /trunk/psphot/src/psphotImageMedian.c	(revision 7940)
+++ /trunk/psphot/src/psphotImageMedian.c	(revision 7941)
@@ -165,10 +165,8 @@
     for (int j = 0; j < image->numRows; j++) {
         for (int i = 0; i < image->numCols; i++) {
-            if (!mask->data.U8[j][i]) {
-                image->data.F32[j][i] -= backData[j][i];
-                if (backSub) {
-                    backSub->image->data.F32[j][i] = image->data.F32[j][i];
-                }
-            }
+	    image->data.F32[j][i] -= backData[j][i];
+	    if (backSub) {
+		backSub->image->data.F32[j][i] = image->data.F32[j][i];
+	    }
         }
     }