fix lower

ppocr/data/imaug/label_ops.py

@@ -99,6 +99,7 @@ class BaseRecLabelEncode(object):
         self.max_text_len = max_text_length
         self.beg_str = "sos"
         self.end_str = "eos"
+        self.lower = False
 
         if character_dict_path is None:
             logger = get_logger()

ppocr/postprocess/rec_postprocess.py

@@ -29,7 +29,6 @@ class BaseRecLabelDecode(object):
         if character_dict_path is None:
             self.character_str = "0123456789abcdefghijklmnopqrstuvwxyz"
             dict_character = list(self.character_str)
-            self.lower = True
         else:
             with open(character_dict_path, "rb") as fin:
                 lines = fin.readlines()