diff --git a/mmseg/datasets/pipelines/transforms.py b/mmseg/datasets/pipelines/transforms.py
index 7f878e3..260c3e3 100755
--- a/mmseg/datasets/pipelines/transforms.py
+++ b/mmseg/datasets/pipelines/transforms.py
@@ -9,6 +9,8 @@ from IPython import embed
 @PIPELINES.register_module()
 class AlignedResize(object):
     """Resize images & seg. Align
+    This class is based on ``Resize``, the only difference is 
+    it ensure the long and short sides are divisible by ``size_divisor``.
     """
 
     def __init__(self,