diff --git a/Code/Three_view_to_isometric/Dataloader.py b/Code/Three_view_to_isometric/Dataloader.py
index 956bcd2..9aece56 100644
--- a/Code/Three_view_to_isometric/Dataloader.py
+++ b/Code/Three_view_to_isometric/Dataloader.py
@@ -6,6 +6,7 @@
 import os
 import numpy as np
 import cv2
+import json
 class ThreeV2I_BC_data(Dataset):
     def __init__(self, root_dir):
         self.dic=sorted(os.listdir(root_dir))