Merge pull request #4960 from tink2123/fix_seed_padding

polist seed code

configs/rec/rec_resnet_stn_bilstm_att.yml

@@ -75,7 +75,7 @@ Train:
           channel_first: False
       - SEEDLabelEncode: # Class handling label
       - RecResizeImg:
-          character_type: en
+          character_dict_path:
           image_shape: [3, 64, 256]
           padding: False
       - KeepKeys:
@@ -96,7 +96,7 @@ Eval:
           channel_first: False
       - SEEDLabelEncode: # Class handling label
       - RecResizeImg:
-          character_type: en
+          character_dict_path:
           image_shape: [3, 64, 256]
           padding: False
       - KeepKeys:

ppocr/data/imaug/label_ops.py

@@ -507,8 +507,12 @@ class SEEDLabelEncode(BaseRecLabelEncode):
             max_text_length, character_dict_path, use_space_char)
 
     def add_special_char(self, dict_character):
+        self.padding = "padding"
         self.end_str = "eos"
-        dict_character = dict_character + [self.end_str]
+        self.unknown = "unknown"
+        dict_character = dict_character + [
+            self.end_str, self.padding, self.unknown
+        ]
         return dict_character
 
     def __call__(self, data):
@@ -519,8 +523,8 @@ class SEEDLabelEncode(BaseRecLabelEncode):
         if len(text) >= self.max_text_len:
             return None
         data['length'] = np.array(len(text)) + 1  # conclude eos
-        text = text + [len(self.character) - 1] * (self.max_text_len - len(text)
-                                                   )
+        text = text + [len(self.character) - 3] + [len(self.character) - 2] * (
+            self.max_text_len - len(text) - 1)
         data['label'] = np.array(text)
         return data
 

ppocr/modeling/heads/rec_aster_head.py

@@ -47,7 +47,7 @@ class AsterHead(nn.Layer):
         self.time_step = time_step
         self.embeder = Embedding(self.time_step, in_channels)
         self.beam_width = beam_width
-        self.eos = self.num_classes - 1
+        self.eos = self.num_classes - 3
 
     def forward(self, x, targets=None, embed=None):
         return_dict = {}

ppocr/postprocess/rec_postprocess.py

@@ -287,9 +287,12 @@ class SEEDLabelDecode(BaseRecLabelDecode):
                                               use_space_char)
 
     def add_special_char(self, dict_character):
-        self.beg_str = "sos"
+        self.padding_str = "padding"
         self.end_str = "eos"
-        dict_character = dict_character + [self.end_str]
+        self.unknown = "unknown"
+        dict_character = dict_character + [
+            self.end_str, self.padding_str, self.unknown
+        ]
         return dict_character
 
     def get_ignored_tokens(self):