feat: 特殊车牌生成管线 + C++/多进程/色温校正

chinese_license_plate_generator/generate_multi_plate.py

@@ -114,6 +114,9 @@ class MultiPlateGenerator:
                     self.location_xys['{}_{}_{}'.format(i, j, k)] = \
                         get_location_data(length=i, split_id=j, height=k)
 
+        # 底板背景缓存（避免每次 generate_plate_special 读盘）
+        self._plate_bg_cache = {}
+
     # 获取字符位置
     def get_location_multi(self, plate_number, height=140):
         length = len(plate_number)
@@ -227,9 +230,15 @@ class MultiPlateGenerator:
         """
         height = 220 if is_double else 140
 
-        # print(plate_number, height, bg_color, is_double)
         number_xy = self.get_location_multi(plate_number, height)
-        img_plate_model = cv2.imread(os.path.join(self.adr_plate_model, '{}_{}.PNG'.format(bg_color, height)))
+
+        # 底板背景（缓存读取，避免每张图读盘）
+        cache_key = '{}_{}'.format(bg_color, height)
+        if cache_key not in self._plate_bg_cache:
+            bg_path = os.path.join(self.adr_plate_model, '{}.PNG'.format(cache_key))
+            self._plate_bg_cache[cache_key] = cv2.imdecode(
+                np.fromfile(bg_path, dtype=np.uint8), cv2.IMREAD_COLOR)
+        img_plate_model = self._plate_bg_cache[cache_key].copy()
         img_plate_model = cv2.resize(img_plate_model, (440 if len(plate_number) == 7 else 480, height))
 
         for i in range(len(plate_number)):