diff --git a/mu_map/dataset/transform.py b/mu_map/dataset/transform.py
index e2fad43adf45ea4788c97e7e9ae54d3f7337ef68..1d4161492ccf95c1af9fc60a260ac3eeced096b5 100644
--- a/mu_map/dataset/transform.py
+++ b/mu_map/dataset/transform.py
@@ -1,6 +1,7 @@
 import math
 from typing import List, Tuple
 
+import numpy as np
 import torch
 from torch import Tensor
 
@@ -126,6 +127,20 @@ class PadCropTranform(SequenceTransform):
         )
 
 
+class ToNumpy():
+    """
+    Special transformer that converts torch tensors to numpy array.
+    """
+    def __call__(self, *tensors: Tensor) -> Tuple[np.ndarray, ...]:
+        return tuple(map(lambda tensor: tensor.numpy(), tensors))
+
+class ToTensor():
+    """
+    Special transformer that converts numpy arrays to torch tensors.
+    """
+    def __call__(self, *tensors: np.ndarray) -> Tuple[Tensor, ...]:
+        return tuple(map(lambda tensor: torch.from_numpy(tensor), tensors))
+
 if __name__ == "__main__":
     transform = PadCropTranform(dim=3, size=32)