diff --git a/bnpm/plotting_helpers.py b/bnpm/plotting_helpers.py
index 85fb88b..d63ad2a 100644
--- a/bnpm/plotting_helpers.py
+++ b/bnpm/plotting_helpers.py
@@ -101,8 +101,8 @@ def display_toggle_image_stack(
     RH 2023
 
     Args:
-        images (Union[List[np.ndarray], List[torch.Tensor]]): 
-            List of images as numpy arrays or PyTorch tensors.
+        images (List[np.ndarray]): 
+            List of images as numpy arrays.
         image_size (Optional[Tuple[int, int]]): 
             Tuple of *(width, height)* for resizing images.\n
             If ``None``, images are not resized.\n
@@ -119,15 +119,15 @@ def display_toggle_image_stack(
             the Image.Resampling.* methods from PIL. (Default is 'nearest')
     """
     from IPython.display import display, HTML
-    import numpy as np
     import base64
     from PIL import Image
     from io import BytesIO
-    import torch
     import datetime
     import hashlib
     import sys
     
+    import numpy as np
+    
     # Get the image size for display
     if image_size is None:
         image_size = images[0].shape[:2]  
@@ -140,9 +140,6 @@ def display_toggle_image_stack(
 
     def normalize_image(image, clim=None):
         """Normalize the input image using the min-max scaling method. Optionally, use the given clim values for scaling."""
-        if isinstance(image, torch.Tensor):
-            image = image.detach().cpu().numpy()
-
         if clim is None:
             clim = (np.min(image), np.max(image))
 
@@ -151,9 +148,6 @@ def normalize_image(image, clim=None):
         return (norm_image * 255).astype(np.uint8)
     def resize_image(image, new_size, interpolation):
         """Resize the given image to the specified new size using the specified interpolation method."""
-        if isinstance(image, torch.Tensor):
-            image = image.detach().cpu().numpy()
-
         pil_image = Image.fromarray(image.astype(np.uint8))
         resized_image = pil_image.resize(new_size, resample=interpolation)
         return np.array(resized_image)