refactor(model): replace AtomModelSingleton with ocr_model_init for OCR model initialization

- Remove usage of AtomModelSingleton for OCR model initialization
- Add import of ocr_model_init from model_init module
- Update OCR model initialization process to use ocr_model_init function
- Remove lock for OCR processing as it's no longer needed

magic_pdf/model/pdf_extract_kit.py

@@ -22,7 +22,7 @@ except ImportError:
 
 from magic_pdf.config.constants import *
 from magic_pdf.model.model_list import AtomicModel
-from magic_pdf.model.sub_modules.model_init import AtomModelSingleton
+from magic_pdf.model.sub_modules.model_init import AtomModelSingleton, ocr_model_init
 from magic_pdf.model.sub_modules.model_utils import (
     clean_vram, crop_img, get_res_list_from_layout_res)
 from magic_pdf.model.sub_modules.ocr.paddleocr.ocr_utils import (
@@ -153,9 +153,14 @@ class CustomPEKModel:
                 device=self.device,
             )
         # 初始化ocr
-        self.ocr_model = atom_model_manager.get_atom_model(
-            atom_model_name=AtomicModel.OCR,
-            ocr_show_log=show_log,
+        # self.ocr_model = atom_model_manager.get_atom_model(
+        #     atom_model_name=AtomicModel.OCR,
+        #     ocr_show_log=show_log,
+        #     det_db_box_thresh=0.3,
+        #     lang=self.lang
+        # )
+        self.ocr_model = ocr_model_init(
+            show_log=show_log,
             det_db_box_thresh=0.3,
             lang=self.lang
         )
@@ -218,7 +223,7 @@ class CustomPEKModel:
 
             # OCR recognition
             new_image = cv2.cvtColor(np.asarray(new_image), cv2.COLOR_RGB2BGR)
-            with self._lock:
+            # with self._lock:
             if self.apply_ocr:
                 ocr_res = self.ocr_model.ocr(new_image, mfd_res=adjusted_mfdetrec_res)[0]
             else: