Index: trunk/ppImage/src/ppImageArguments.c
===================================================================
--- trunk/ppImage/src/ppImageArguments.c	(revision 19943)
+++ trunk/ppImage/src/ppImageArguments.c	(revision 23229)
@@ -14,4 +14,5 @@
     fprintf(stderr, "\t-chip CHIPNUM: Only process this chip number.\n");
     fprintf(stderr, "\t-norm VALUE: Divide through by this value when done.\n");
+    fprintf(stderr, "\t-normlist file.mdc: normalizations by class_id.\n");
     fprintf(stderr, "\n");
     fprintf(stderr, "Input options (single file / file list):\n");
@@ -128,10 +129,23 @@
     }
 
-    // Optional normalisation factor
+    // Optional normalization factor
     if ((argnum = psArgumentGet(argc, argv, "-norm"))) {
         psArgumentRemove(argnum, &argc, argv);
         float norm = atof(argv[argnum]);
-        psMetadataAddF32(config->arguments, PS_LIST_TAIL, "NORMALISATION", 0,
+        psMetadataAddF32(config->arguments, PS_LIST_TAIL, "NORMALIZATION", 0,
                          "Normalisation to apply", norm);
+        psArgumentRemove(argnum, &argc, argv);
+    }
+
+    // Optional per-class normalization table
+    if ((argnum = psArgumentGet(argc, argv, "-normlist"))) {
+        psArgumentRemove(argnum, &argc, argv);
+
+	unsigned int nFail = 0;
+	psMetadata *normlist = psMetadataConfigRead (NULL, &nFail, argv[argnum], false);
+	// XXX allow this file to be in nebulous?
+
+        psMetadataAddMetadata(config->arguments, PS_LIST_TAIL, "NORMALIZATION.TABLE", 0, "Normalization to apply", normlist);
+	psFree (normlist);
         psArgumentRemove(argnum, &argc, argv);
     }