python3 deploy/py_infer/infer.py
--backend=lite
--input_images_dir= test_pics
--det_model_path=tools/build/ch_PP-OCRv4_det_db_dynamic_output.mindir
--det_model_name_or_config=ch_pp_det_OCRv4
--rec_model_path=tools/build/ch_PP-OCRv4_rec_crnn_dynamic_output.mindir
--rec_model_name_or_config=ch_pp_rec_OCRv4
--character_dict_path=ppocr_keys_v1.txt
--res_save_dir=result