--- a/magic-lantern/modules/dual_iso/cr2hdr.c
+++ b/magic-lantern/modules/dual_iso/cr2hdr.c
@@ -60,6 +60,7 @@
 
 /** Command-line interface */
 
+int process_method = 0;
 int interp_method = 0;          /* 0:amaze-edge, 1:mean23 */
 int chroma_smooth_method = 2;
 int fix_pink_dots = 0;
@@ -98,7 +99,13 @@
 
 void check_shortcuts()
 {
-    if (shortcut_fast)
+    if (process_method == 1)
+    {
+        interp_method = 2;
+        chroma_smooth_method = 1;
+        gray_wb = 5;
+    }
+    else if (shortcut_fast)
     {
         interp_method = 1;
         chroma_smooth_method = 0;
@@ -129,6 +136,13 @@
 
 struct cmd_group options[] = {
     {
+        "Processing methods", (struct cmd_option[]) {
+            { &process_method, 0, "--process",  "Process Dual ISO compatible file (default)" },
+            { &process_method, 1, "--dry-run",  "Only check file for Dual ISO presence" },
+            OPTION_EOL
+        },
+    },
+    {
         "Shortcuts", (struct cmd_option []) {
             { &shortcut_fast, 1, "--fast",  "disable most postprocessing steps (fast, but low quality)\n"
                             "                  (--mean23, --no-cs, --no-fullres, --no-alias-map, --no-stripe-fix, --no-bad-pix)" },
@@ -870,12 +884,12 @@
                 whites[num_files] = raw_info.white_level;
                 num_files++;
             }
-            else
+            else if (process_method != 1)
             {
                 printf("ISO blending didn't work\n");
             }
         }
-        else
+        else if (process_method != 1)
         {
             printf("Doesn't look like interlaced ISO\n");
         }
@@ -2206,7 +2220,15 @@
     double corr_ev = 0;
     int white_darkened = white_bright;
     int ok = match_exposures(&corr_ev, &white_darkened);
-    if (!ok) goto err;
+    if (!ok)
+    {
+        goto err;
+    }
+    else if (ok && process_method == 1)
+    {
+        printf("Interlaced ISO detected\n"); /*. File: %s\n", filename);*/
+        return 0;
+    }
 
     /* run a second black subtract pass, to fix whatever our funky processing may do to blacks */
     black_subtract_simple(raw_info.active_area.x1, raw_info.active_area.y1);