Add label_font_path parameter to change the font of the label (#100)

Add label_font_path parameter to change the font of the label

Co-authored-by: [email protected] <7p=e763wN3A6k+[C>

PPOCRLabel.py

@@ -38,7 +38,15 @@
     QPointF,
     QProcess,
 )
-from PyQt5.QtGui import QImage, QCursor, QPixmap, QImageReader, QColor, QIcon
+from PyQt5.QtGui import (
+    QImage,
+    QCursor,
+    QPixmap,
+    QImageReader,
+    QColor,
+    QIcon,
+    QFontDatabase,
+)
 from PyQt5.QtWidgets import (
     QMainWindow,
     QListWidget,
@@ -141,6 +149,7 @@ def __init__(
         rec_model_dir=None,
         rec_char_dict_path=None,
         cls_model_dir=None,
+        label_font_path=None,
     ):
         super(MainWindow, self).__init__()
         self.setWindowTitle(__appname__)
@@ -1190,6 +1199,15 @@ def getStr(strId):
         if self.filePath and os.path.isdir(self.filePath):
             self.openDirDialog(dirpath=self.filePath, silent=True)
 
+        # load font
+        self.label_font_family = None
+        if label_font_path is not None:
+            label_font_id = QFontDatabase.addApplicationFont(label_font_path)
+            if label_font_id >= 0:
+                self.label_font_family = QFontDatabase.applicationFontFamilies(
+                    label_font_id
+                )[0]
+
     def menu(self, title, actions=None):
         menu = self.menuBar().addMenu(title)
         if actions:
@@ -1640,7 +1658,12 @@ def loadLabels(self, shapes):
         s = []
         shape_index = 0
         for label, points, line_color, key_cls, difficult in shapes:
-            shape = Shape(label=label, line_color=line_color, key_cls=key_cls)
+            shape = Shape(
+                label=label,
+                line_color=line_color,
+                key_cls=key_cls,
+                font_family=self.label_font_family,
+            )
             for x, y in points:
                 # Ensure the labels are within the bounds of the image. If not, fix them.
                 x, y, snapped = self.canvas.snapPointToCanvas(x, y)
@@ -3574,6 +3597,7 @@ def get_main_app(argv=[]):
     arg_parser.add_argument(
         "--bbox_auto_zoom_center", type=str2bool, default=False, nargs="?"
     )
+    arg_parser.add_argument("--label_font_path", type=str, default=None, nargs="?")
 
     args = arg_parser.parse_args(argv[1:])
 
@@ -3588,6 +3612,7 @@ def get_main_app(argv=[]):
         rec_char_dict_path=args.rec_char_dict_path,
         cls_model_dir=args.cls_model_dir,
         bbox_auto_zoom_center=args.bbox_auto_zoom_center,
+        label_font_path=args.label_font_path,
     )
     win.show()
     return app, win

README.md

@@ -16,6 +16,8 @@ PPOCRLabelv2 is a semi-automatic graphic annotation tool suitable for OCR field,
 
 ### Recent Update
 
+- 2024.11:
+  - Add `label_font_path` parameter to change the font of the label.
 - 2024.09:
   - Added `Re-recognition` and `Auto Save Unsaved changes` features. For usage details, please refer to the "11. Additional Feature Description" in the "2.1 Operational Steps" section below.
   - Added the parameter `--img_list_natural_sort`, which defaults to natural sorting for the left image list. After configuring this parameter, character sorting will be used to easily locate images based on character order.

README_ch.md

@@ -16,6 +16,8 @@ PPOCRLabel是一款适用于OCR领域的半自动化图形标注工具，内置P
 
 #### 近期更新
 
+- 2024.11:
+  - 新增`label_font_path`参数，用来改变标签字体
 - 2024.09:
   - 新增`自动重新识别`和`自动保存未提交变更`功能，使用方法详见下方`2.1 操作步骤`的`11. 补充功能说明`。
   - 新增`--img_list_natural_sort`参数，默认左侧图片列表使用自然排序，配置该参数后，将使用字符排序，方便根据字符顺序定位图片。

libs/shape.py

@@ -55,6 +55,7 @@ def __init__(
         key_cls="None",
         paintLabel=False,
         paintIdx=False,
+        font_family=None,
     ):
         self.label = label
         self.idx = None  # bbox order, only for table annotation
@@ -78,7 +79,7 @@ def __init__(
         self.fontsize = 8
 
         self._closed = False
-
+        self.font_family = font_family
         if line_color is not None:
             # Override the class line_color attribute
             # with an object attribute. Currently this
@@ -173,6 +174,8 @@ def paint(self, painter):
                     min_y = min(min_y, point.y())
                 if min_x != sys.maxsize and min_y != sys.maxsize:
                     font = QFont()
+                    if self.font_family is not None:
+                        font.setFamily(self.font_family)
                     font.setPointSize(self.fontsize)
                     font.setBold(True)
                     painter.setFont(font)