Update the readme of PPOCRLabel

Update the readme of PPOCRLabel

PPOCRLabel/README.md

@@ -175,13 +175,17 @@ python3 PPOCRLabel.py
 PPOCRLabel supports three ways to export Label.txt
 
 - Automatically export: After selecting "File - Auto Export Label Mode", the program will automatically write the annotations into Label.txt every time the user confirms an image. If this option is not turned on, it will be automatically exported after detecting that the user has manually checked 5 images.
+
+  > The automatically export mode is turned off by default
+
 - Manual export: Click "File-Export Marking Results" to manually export the label.
+
 - Close application export
 
 
 ### 3.4 Export Partial Recognition Results
 
-For some data that are difficult to recognize, the recognition results will not be exported by **unchecking** the corresponding tags in the recognition results checkbox.
+For some data that are difficult to recognize, the recognition results will not be exported by **unchecking** the corresponding tags in the recognition results checkbox. The unchecked recognition result is saved as `True` in the `difficult` variable in the label file `label.txt`.
 
 > *Note: The status of the checkboxes in the recognition results still needs to be saved manually by clicking Save Button.*
 

PPOCRLabel/README_ch.md

@@ -161,12 +161,16 @@ python3 PPOCRLabel.py --lang ch
 PPOCRLabel支持三种导出方式：
 
 - 自动导出：点击“文件 - 自动导出标记结果”后，用户每确认过一张图片，程序自动将标记结果写入Label.txt中。若未开启此选项，则检测到用户手动确认过5张图片后进行自动导出。
+
+  > 默认情况下自动导出功能为关闭状态
+
 - 手动导出：点击“文件 - 导出标记结果”手动导出标记。
+
 - 关闭应用程序导出
 
 ### 3.4 导出部分识别结果
 
-针对部分难以识别的数据，通过在识别结果的复选框中**取消勾选**相应的标记，其识别结果不会被导出。
+针对部分难以识别的数据，通过在识别结果的复选框中**取消勾选**相应的标记，其识别结果不会被导出。被取消勾选的识别结果在标记文件 `label.txt` 中的 `difficult` 变量保存为 `True` 。
 
 > *注意：识别结果中的复选框状态仍需用户手动点击确认后才能保留*