diff --git a/modelscope/models/cv/ocr_recognition/preprocessor.py b/modelscope/models/cv/ocr_recognition/preprocessor.py
index 2458f486..d327cd3c 100644
--- a/modelscope/models/cv/ocr_recognition/preprocessor.py
+++ b/modelscope/models/cv/ocr_recognition/preprocessor.py
@@ -1,13 +1,11 @@
 # Copyright (c) Alibaba, Inc. and its affiliates.
 
-import math
 import os
 
 import cv2
 import numpy as np
 import PIL
 import torch
-import math
 
 from modelscope.metainfo import Preprocessors
 from modelscope.preprocessors import Preprocessor, load_image