Index: trunk/ippTools/src/dettool.c
===================================================================
--- trunk/ippTools/src/dettool.c	(revision 9227)
+++ trunk/ippTools/src/dettool.c	(revision 9231)
@@ -2967,4 +2967,31 @@
         return false;
     }
+    psF64 bg = psMetadataLookupF64(&status, config->args, "-bg");
+    if (!status) {
+        psError(PS_ERR_UNKNOWN, false, "failed to lookup value for -bg");
+        return false;
+    }
+    if (isnan(bg)) {
+        psError(PS_ERR_UNKNOWN, true, "-bg is required");
+        return false;
+    }
+    psF64 bg_stdev = psMetadataLookupF64(&status, config->args, "-bg_stdev");
+    if (!status) {
+        psError(PS_ERR_UNKNOWN, false, "failed to lookup value for -bg_stdev");
+        return false;
+    }
+    if (isnan(bg_stdev)) {
+        psError(PS_ERR_UNKNOWN, true, "-bg_stdev is required");
+        return false;
+    }
+    psF64 bg_mean_stdev = psMetadataLookupF64(&status, config->args, "-bg_mean_stdev");
+    if (!status) {
+        psError(PS_ERR_UNKNOWN, false, "failed to lookup value for -bg_mean_stdev");
+        return false;
+    }
+    if (isnan(bg_mean_stdev)) {
+        psError(PS_ERR_UNKNOWN, true, "-bg_mean_stdev is required");
+        return false;
+    }
     // optional
     psString b1_uri = psMetadataLookupStr(&status, config->args, "-b1_uri");
@@ -2984,4 +3011,7 @@
         statImfile->class_id,
         uri,
+        bg,
+        bg_stdev,
+        bg_mean_stdev,
         b1_uri,
         b2_uri
Index: trunk/ippTools/src/dettoolConfig.c
===================================================================
--- trunk/ippTools/src/dettoolConfig.c	(revision 9227)
+++ trunk/ippTools/src/dettoolConfig.c	(revision 9231)
@@ -268,15 +268,21 @@
     // -addnormalizedimfile
     psMetadata *addnormalizedimfileArgs = psMetadataAlloc();
-    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-det_id",  0,
-        "define detrend ID (required)", NULL);
-    psMetadataAddS32(addnormalizedimfileArgs, PS_LIST_TAIL, "-iteration",  0,
-        "define iteration number", 0);
-    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-class_id",  0,
+    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-det_id", 0,
+        "define detrend ID (required)", NULL);
+    psMetadataAddS32(addnormalizedimfileArgs, PS_LIST_TAIL, "-iteration", 0,
+        "define iteration number", 0);
+    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-class_id", 0,
         "define class ID (required)", NULL);
-    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-uri",  0,
+    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-uri", 0,
         "define URI (required)", NULL);
-    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-b1_uri",  0,
+    psMetadataAddF64(addnormalizedimfileArgs, PS_LIST_TAIL, "-bg", 0,
+        "define exposue background", NAN);
+    psMetadataAddF64(addnormalizedimfileArgs, PS_LIST_TAIL, "-bg_stdev", 0,
+        "define exposue background stdev", NAN);
+    psMetadataAddF64(addnormalizedimfileArgs, PS_LIST_TAIL, "-bg_mean_stdev", 0,
+        "define exposue background mean stdev", NAN);
+    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-b1_uri", 0,
         "define banana 1", NULL);
-    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-b2_uri",  0,
+    psMetadataAddStr(addnormalizedimfileArgs, PS_LIST_TAIL, "-b2_uri", 0,
         "define banana 2", NULL);