partial refactoring of py_infer & OCRServer (#638)

* Fix: result of det infer node

* Fix det infer

Author: horcham

configs/det/fcenet/README.md

@@ -104,17 +104,17 @@ train:
   dataset:
     type: DetDataset
     dataset_root: dir/to/dataset          <--- Update
-    data_dir: icda/ch4_training_images    <--- Update
-    label_file: icda/train_det_gt.txt     <--- Update
+    data_dir: train/images                <--- Update
+    label_file: train/train_det_gt.txt    <--- Update
 ...
 eval:
   ckpt_load_path: '/best.ckpt'            <--- Update
   dataset_sink_mode: False
   dataset:
     type: DetDataset
     dataset_root: dir/to/dataset          <--- Update
-    data_dir: icda/ch4_test_images        <--- Update
-    label_file: icda/test_det_gt.txt      <--- Update
+    data_dir: test/images                 <--- Update
+    label_file: test/test_det_gt.txt      <--- Update
 ...
 ```
 

configs/det/fcenet/README_CN.md

@@ -103,23 +103,23 @@ MindOCR中的FCENet网络在ICDAR 2015数据集上训练。训练结果如下：
 ```yaml
 ...
 train:
-  ckpt_save_dir: './tmp_det_fcenet'
+  ckpt_save_dir: './tmp_det'
   dataset_sink_mode: False
   ema: True
   dataset:
     type: DetDataset
     dataset_root: dir/to/dataset          <--- 更新
-    data_dir: icda/ch4_training_images    <--- 更新
-    label_file: icda/train_det_gt.txt     <--- 更新
+    data_dir: train/images                <--- 更新
+    label_file: train/train_det_gt.txt    <--- 更新
 ...
 eval:
   ckpt_load_path: '/best.ckpt'            <--- 更新
   dataset_sink_mode: False
   dataset:
     type: DetDataset
     dataset_root: dir/to/dataset          <--- 更新
-    data_dir: icda/ch4_test_images        <--- 更新
-    label_file: icda/test_det_gt.txt      <--- 更新
+    data_dir: test/images                 <--- 更新
+    label_file: test/test_det_gt.txt      <--- 更新
 ...
 ```
 

configs/det/fcenet/fce_icdar15.yaml

@@ -52,14 +52,14 @@ optimizer:
 
 
 train:
-  ckpt_save_dir: './tmp_det_fcenet'
+  ckpt_save_dir: './tmp_det'
   dataset_sink_mode: True
   ema: True
   dataset:
     type: DetDataset
-    dataset_root: data
-    data_dir: icda/ch4_training_images
-    label_file: icda/train_det_gt.txt
+    dataset_root: /data/ocr_datasets
+    data_dir: ic15/det/train/ch4_training_images
+    label_file: ic15/det/train/det_gt.txt
     sample_ratio: 1.0
     transform_pipeline:
       - DecodeImage:
@@ -114,9 +114,9 @@ eval:
   dataset_sink_mode: False
   dataset:
     type: DetDataset
-    dataset_root: data
-    data_dir: icda/ch4_test_images
-    label_file: icda/test_det_gt.txt
+    dataset_root: /data/ocr_datasets
+    data_dir: ic15/det/test/ch4_test_images
+    label_file: ic15/det/test/det_gt.txt
     sample_ratio: 1.0
     shuffle: False
     transform_pipeline: