CTC token update fix

utils.py

@@ -6,12 +6,12 @@ class CTCLabelConverter(object):
 
     def __init__(self, character):
         # character (str): set of the possible characters.
-        list_token = ['[BLANK]'] # '[BLANK] ' for blank token (index 0)
+        list_token = ['[blank]'] # dummy '[blank]' token for CTCLoss (index 0)
         list_character = list(character)
         self.character = list_token + list_character  
 
         self.dict = {}
-        for i, char in enumerate(self.character):
+        for i, char in enumerate(list_character):
             # NOTE: 0 is reserved for 'blank' token required by CTCLoss
             self.dict[char] = i + 1