diff --git a/src/transformers/models/blip/processing_blip.py b/src/transformers/models/blip/processing_blip.py
index 3b9d5c369a44..a2e927ed9b28 100644
--- a/src/transformers/models/blip/processing_blip.py
+++ b/src/transformers/models/blip/processing_blip.py
@@ -47,6 +47,7 @@ def __init__(self, image_processor, tokenizer):
         super().__init__(image_processor, tokenizer)
         self.current_processor = self.image_processor
 
+    #  TODO uniformize signature
     def __call__(
         self,
         images: ImageInput = None,
diff --git a/src/transformers/models/bros/processing_bros.py b/src/transformers/models/bros/processing_bros.py
index 9c2e0642d8cd..8f7aa3004642 100644
--- a/src/transformers/models/bros/processing_bros.py
+++ b/src/transformers/models/bros/processing_bros.py
@@ -44,6 +44,7 @@ def __init__(self, tokenizer=None, **kwargs):
 
         super().__init__(tokenizer)
 
+    #  TODO uniformize signature if possible, or move to text-only (only bboxes needed)
     def __call__(
         self,
         text: Union[TextInput, PreTokenizedInput, List[TextInput], List[PreTokenizedInput]] = None,
diff --git a/src/transformers/models/layoutxlm/processing_layoutxlm.py b/src/transformers/models/layoutxlm/processing_layoutxlm.py
index b1d885255b7c..65d34e48c5ec 100644
--- a/src/transformers/models/layoutxlm/processing_layoutxlm.py
+++ b/src/transformers/models/layoutxlm/processing_layoutxlm.py
@@ -64,6 +64,7 @@ def __init__(self, image_processor=None, tokenizer=None, **kwargs):
 
         super().__init__(image_processor, tokenizer)
 
+    #  TODO uniformize signature
     def __call__(
         self,
         images,
diff --git a/src/transformers/models/mgp_str/processing_mgp_str.py b/src/transformers/models/mgp_str/processing_mgp_str.py
index 71422e844d0f..554e8648b6af 100644
--- a/src/transformers/models/mgp_str/processing_mgp_str.py
+++ b/src/transformers/models/mgp_str/processing_mgp_str.py
@@ -76,6 +76,7 @@ def __init__(self, image_processor=None, tokenizer=None, **kwargs):
 
         super().__init__(image_processor, tokenizer)
 
+    #  TODO uniformize signature
     def __call__(self, text=None, images=None, return_tensors=None, **kwargs):
         """
         When used in normal mode, this method forwards all its arguments to ViTImageProcessor's
diff --git a/src/transformers/models/nougat/processing_nougat.py b/src/transformers/models/nougat/processing_nougat.py
index 8f94c6718ba6..dace9f37b5c8 100644
--- a/src/transformers/models/nougat/processing_nougat.py
+++ b/src/transformers/models/nougat/processing_nougat.py
@@ -46,6 +46,7 @@ def __init__(self, image_processor, tokenizer):
         super().__init__(image_processor, tokenizer)
         self.current_processor = self.image_processor
 
+    #  TODO uniformize signature
     def __call__(
         self,
         images=None,
diff --git a/src/transformers/models/pix2struct/processing_pix2struct.py b/src/transformers/models/pix2struct/processing_pix2struct.py
index 269fa8c62fb2..8a17a7cb1f7d 100644
--- a/src/transformers/models/pix2struct/processing_pix2struct.py
+++ b/src/transformers/models/pix2struct/processing_pix2struct.py
@@ -46,6 +46,7 @@ def __init__(self, image_processor, tokenizer):
         tokenizer.return_token_type_ids = False
         super().__init__(image_processor, tokenizer)
 
+    #  TODO uniformize signature
     def __call__(
         self,
         images=None,
diff --git a/src/transformers/models/vilt/processing_vilt.py b/src/transformers/models/vilt/processing_vilt.py
index 0ccb884ea00c..4d17bd7052ae 100644
--- a/src/transformers/models/vilt/processing_vilt.py
+++ b/src/transformers/models/vilt/processing_vilt.py
@@ -61,6 +61,7 @@ def __init__(self, image_processor=None, tokenizer=None, **kwargs):
         super().__init__(image_processor, tokenizer)
         self.current_processor = self.image_processor
 
+    #  TODO uniformize signature
     def __call__(
         self,
         images,