fix det v4 bug in dynamic ratio (#9874)

* fix set bug

* refine 960 to 640

* fix details

* add epoch num

* add rep export

* use db head

configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_student.yml

 Global:
   debug: false
   use_gpu: true
-  epoch_num: 500
+  epoch_num: &epoch_num 500
   log_smooth_window: 20
   print_batch_step: 100
-  save_model_dir: ./output/ch_PP-OCRv3_mv3_cbnlocal_shrink/
+  save_model_dir: ./output/ch_PP-OCRv4
   save_epoch_step: 10
   eval_batch_step:
   - 0
@@ -31,9 +31,8 @@ Architecture:
     out_channels: 96
     shortcut: True
   Head:
-    name: PFHeadLocal
+    name: DBHead
     k: 50
-    mode: "small"
 
 Loss:
   name: DBLoss
@@ -96,19 +95,19 @@ Train:
             - 3
     - EastRandomCropData:
         size:
-        - 960
-        - 960
+        - 640
+        - 640
         max_tries: 50
         keep_ratio: true
     - MakeBorderMap:
         shrink_ratio: 0.4
         thresh_min: 0.3
         thresh_max: 0.7
-        total_epoch: 500
+        total_epoch: *epoch_num
     - MakeShrinkMap:
         shrink_ratio: 0.4
         min_text_size: 8
-        total_epoch: 500
+        total_epoch: *epoch_num
     - NormalizeImage:
         scale: 1./255.
         mean:

configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_teacher.yml

 Global:
   debug: false
   use_gpu: true
-  epoch_num: 500
+  epoch_num: &epoch_num 500
   log_smooth_window: 20
   print_batch_step: 100
-  save_model_dir: ./output/ch_PP-OCRv3_mv3_cbnlocal_shrink/
+  save_model_dir: ./output/ch_PP-OCRv4
   save_epoch_step: 10
   eval_batch_step:
   - 0
@@ -96,19 +96,19 @@ Train:
             - 3
     - EastRandomCropData:
         size:
-        - 960
-        - 960
+        - 640
+        - 640
         max_tries: 50
         keep_ratio: true
     - MakeBorderMap:
         shrink_ratio: 0.4
         thresh_min: 0.3
         thresh_max: 0.7
-        total_epoch: 500
+        total_epoch: *epoch_num
     - MakeShrinkMap:
         shrink_ratio: 0.4
         min_text_size: 8
-        total_epoch: 500
+        total_epoch: *epoch_num
     - NormalizeImage:
         scale: 1./255.
         mean:

ppocr/data/simple_dataset.py

@@ -51,22 +51,22 @@ class SimpleDataSet(Dataset):
         if self.mode == "train" and self.do_shuffle:
             self.shuffle_data_random()
 
-        self.set_epoch_as_seed(self.seed)
+        self.set_epoch_as_seed(self.seed, dataset_config)
 
         self.ops = create_operators(dataset_config['transforms'], global_config)
         self.ext_op_transform_idx = dataset_config.get("ext_op_transform_idx",
                                                        2)
         self.need_reset = True in [x < 1 for x in ratio_list]
 
-    def set_epoch_as_seed(self, seed):
-        if self.mode is 'train':
+    def set_epoch_as_seed(self, seed, dataset_config):
+        if self.mode == 'train':
             try:
                 dataset_config['transforms'][5]['MakeBorderMap'][
                     'epoch'] = seed if seed is not None else 0
                 dataset_config['transforms'][6]['MakeShrinkMap'][
                     'epoch'] = seed if seed is not None else 0
             except Exception as E:
-                logger.info(E)
+                print(E)
                 return
 
     def get_image_info_list(self, file_list, ratio_list):