Fix the x2coco.py (#96)

* Update GETTING_STARTED_cn.md
* Update x2coco.py

ppdet/data/tools/x2coco.py

@@ -132,7 +132,7 @@ def deal_json(ds_type, img_path, json_path):
     image_num = -1
     object_num = -1
     for img_file in os.listdir(img_path):
-        img_label = img_file.split('.')[0]
+        img_label = os.path.splitext(img_file)[0]
         if img_file.split('.')[
                 -1] not in ['bmp', 'jpg', 'jpeg', 'png', 'JPEG', 'JPG', 'PNG']:
             continue
@@ -282,13 +282,16 @@ def main():
             indent=4,
             cls=MyEncoder)
     if args.val_proportion != 0:
-        val_data_coco = deal_json(args.output_dir + '/val', args.json_input_dir)
+        val_data_coco = deal_json(args.dataset_type, 
+                                  args.output_dir + '/val', 
+                                  args.json_input_dir)
         val_json_path = osp.join(args.output_dir + '/annotations',
                                  'instance_val.json')
         json.dump(
             val_data_coco, open(val_json_path, 'w'), indent=4, cls=MyEncoder)
     if args.test_proportion != 0:
-        test_data_coco = deal_json(args.output_dir + '/test',
+        test_data_coco = deal_json(args.dataset_type, 
+                                   args.output_dir + '/test',
                                    args.json_input_dir)
         test_json_path = osp.join(args.output_dir + '/annotations',
                                   'instance_test.json')