fix infer_rec for benchmark

configs/rec/rec_benchmark_reader.yml

@@ -10,3 +10,4 @@ EvalReader:
 TestReader:
   reader_function: ppocr.data.rec.dataset_traversal,LMDBReader
   lmdb_sets_dir: ./train_data/data_lmdb_release/evaluation/
+  infer_img: 

ppocr/data/rec/dataset_traversal.py

@@ -42,9 +42,11 @@ class LMDBReader(object):
         self.mode = params['mode']
         if params['mode'] == 'train':
             self.batch_size = params['train_batch_size_per_card']
-        else:
+        elif params['mode'] == "eval":
             self.batch_size = params['test_batch_size_per_card']
-
+        elif params['mode'] == "test":
+            self.batch_size = 1
+            self.infer_img = params["infer_img"]
     def load_hierarchical_lmdb_dataset(self):
         lmdb_sets = {}
         dataset_idx = 0
@@ -97,6 +99,15 @@ class LMDBReader(object):
             process_id = 0
 
         def sample_iter_reader():
+            if self.mode == 'test':
+                image_file_list = get_image_file_list(self.infer_img)
+                for single_img in image_file_list:
+                    img = cv2.imread(single_img)
+                    if img.shape[-1]==1 or len(list(img.shape))==2:
+                        img = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
+                    norm_img = process_image(img, self.image_shape)
+                    yield norm_img
+            else:
                 lmdb_sets = self.load_hierarchical_lmdb_dataset()
                 if process_id == 0:
                     self.print_lmdb_sets_info(lmdb_sets)
@@ -124,7 +135,6 @@ class LMDBReader(object):
                     if finish_read_num == len(lmdb_sets):
                         break
                 self.close_lmdb_dataset(lmdb_sets)
-
         def batch_iter_reader():
             batch_outs = []
             for outs in sample_iter_reader():
@@ -135,7 +145,9 @@ class LMDBReader(object):
             if len(batch_outs) != 0:
                 yield batch_outs
 
+        if self.mode != 'test':
             return batch_iter_reader
+        return sample_iter_reader
 
 
 class SimpleReader(object):