Update README.md

README.md

@@ -58,7 +58,19 @@ This flat version of the dataset was specifically compiled to aid Large Multimod
 - `page_id`: str, unique ID for the particular page
 - `question`: str, the question to answer
 - `answer`: str, the actual answer
-- `image`: PIL.Image, the actual image to use for the question.
+- `image`: str, a base64 encoded binary string of the image.
+
+The `image` is converted back to a PIL.Image with: 
+```python
+import base64
+import io
+
+
+def decode_base64_to_image(base64_string):
+    img_data = base64.b64decode(base64_string)
+    img = Image.open(io.BytesIO(img_data))
+    return img
+```
 
 ## Data Statistics