diff --git a/ppocr/postprocess/db_postprocess.py b/ppocr/postprocess/db_postprocess.py
index bcba1fd5127fd86ca14ace315ca7a4f4ec77f18b..769ddbe23253ce58e2bccd46ef5074cc2a7d27da 100755
--- a/ppocr/postprocess/db_postprocess.py
+++ b/ppocr/postprocess/db_postprocess.py
@@ -54,6 +54,7 @@ class DBPostProcess(object):
         _bitmap: single map with shape (1, H, W),
                 whose values are binarized as {0, 1}
         '''
+
         bitmap = _bitmap
         height, width = bitmap.shape