fix whl doc

doc/doc_ch/whl.md

@@ -390,6 +390,7 @@ im_show.save('result.jpg')
 | det_db_thresh           | DB模型输出预测图的二值化阈值                                                                                                                                                                                         | 0.3                     |
 | det_db_box_thresh       | DB模型输出框的阈值，低于此值的预测框会被丢弃                                                                                                                                                                           | 0.5                     |
 | det_db_unclip_ratio     | DB模型输出框扩大的比例                                                                                                                                                                                               | 2                       |
+| det_db_score_mode |    | 'fast' |
 | det_east_score_thresh   | EAST模型输出预测图的二值化阈值                                                                                                                                                                                       | 0.8                     |
 | det_east_cover_thresh   | EAST模型输出框的阈值，低于此值的预测框会被丢弃                                                                                                                                                                         | 0.1                     |
 | det_east_nms_thresh     | EAST模型输出框NMS的阈值                                                                                                                                                                                              | 0.2                     |

doc/doc_en/whl_en.md

@@ -342,6 +342,7 @@ im_show.save('result.jpg')
 | det_db_thresh           | Binarization threshold value of DB output map                                                                                                                                                                                        | 0.3                     |
 | det_db_box_thresh       | The threshold value of the DB output box. Boxes score lower than this value will be discarded                                                                                                                                                                         | 0.5                     |
 | det_db_unclip_ratio     | The expanded ratio of DB output box                                                                                                                                                                                             | 2                       |
+| det_db_score_mode |  The parameter that control how the score of the detection frame is calculated. There are 'fast' and 'slow' options. If the text to be detected is curved, it is recommended to use 'slow'  | 'fast' |
 | det_east_score_thresh   | Binarization threshold value of EAST output map                                                                                                                                                                                       | 0.8                     |
 | det_east_cover_thresh   | The threshold value of the EAST output box. Boxes score lower than this value will be discarded                                                                                                                                                                         | 0.1                     |
 | det_east_nms_thresh     | The NMS threshold value of EAST model output box                                                                                                                                                                                              | 0.2                     |