Add: Normalization parameters for the image encoders

config.json

@@ -25,6 +25,8 @@
         "num_layers": 12,
         "num_heads": 6,
         "embedding_dim": 256,
+        "normalization_means": [0.48145466, 0.4578275, 0.40821073],
+        "normalization_deviations": [0.26862954, 0.26130258, 0.27577711],
         "pooling": "cls"
     }
 }