Add preprocessor config

preprocessor_config.json

@@ -0,0 +1,15 @@
+{
+  "do_normalize": true,
+  "do_resize": true,
+  "image_mean": [
+    0.5,
+    0.5,
+    0.5
+  ],
+  "image_std": [
+    0.5,
+    0.5,
+    0.5
+  ],
+  "size": 224
+}