diff --git a/python/paddle/vision/ops.py b/python/paddle/vision/ops.py
index e4dd4c797fef67dc4b03a0276bc226c5cb7cdb20..d45c652885b6989cc86d3115f4d91ac2ca318875 100644
--- a/python/paddle/vision/ops.py
+++ b/python/paddle/vision/ops.py
@@ -895,7 +895,10 @@ def decode_jpeg(x, mode='unchanged', name=None):
 
     Examples:
         .. code-block:: python
+
+            # required: gpu
             import cv2
+            import numpy as np
             import paddle
 
             fake_img = (np.random.random(