Update app.py

app.py

@@ -60,7 +60,9 @@ def custom_decode_predictions(predictions, class_labels):
     return decoded_predictions
 
 def classify_image(img):
-    img_array = img_to_array(img) 
+    img_array = img_to_array(img)
+    img_array = img_array / 255.0
+    img_array = (img_array - img_array.mean()) / img_array.std()
     img_array = np.expand_dims(img_array, axis=0)
     img_array = preprocess_input(img_array)