diff --git a/PPOCRLabel.py b/PPOCRLabel.py
index de5089e..2eee8d6 100644
--- a/PPOCRLabel.py
+++ b/PPOCRLabel.py
@@ -3552,7 +3552,6 @@ def get_main_app(argv=[]):
     arg_parser = argparse.ArgumentParser()
     arg_parser.add_argument("--lang", type=str, default="ch", nargs="?")
     arg_parser.add_argument("--gpu", type=str2bool, default=True, nargs="?")
-    # 左侧列表排序方法
     arg_parser.add_argument(
         "--img_list_natural_sort", type=str2bool, default=True, nargs="?"
     )
@@ -3564,13 +3563,10 @@ def get_main_app(argv=[]):
         ),
         nargs="?",
     )
-    # 外部模型参数
     arg_parser.add_argument("--det_model_dir", type=str, default=None, nargs="?")
     arg_parser.add_argument("--rec_model_dir", type=str, default=None, nargs="?")
     arg_parser.add_argument("--rec_char_dict_path", type=str, default=None, nargs="?")
     arg_parser.add_argument("--cls_model_dir", type=str, default=None, nargs="?")
-
-    # 只有一个标记框的时候自动放大居中
     arg_parser.add_argument(
         "--bbox_auto_zoom_center", type=str2bool, default=False, nargs="?"
     )
diff --git a/libs/canvas.py b/libs/canvas.py
index cda9a09..6808784 100644
--- a/libs/canvas.py
+++ b/libs/canvas.py
@@ -40,7 +40,6 @@ class Canvas(QWidget):
 
     epsilon = 5.0
 
-    # 切换选中标记框4个点单独上下左右移动， 默认为None，则四个点同时移动
     shape_move_index = None
 
     def __init__(self, *args, **kwargs):
diff --git a/libs/utils.py b/libs/utils.py
index 373f91f..a11d7a6 100644
--- a/libs/utils.py
+++ b/libs/utils.py
@@ -363,8 +363,11 @@ def keysInfo(lang="en"):
 
 def polygon_bounding_box_center_and_area(points):
     """
-    计算多边形外接矩形的中心和面积
+    Calculate the center and area of the bounding rectangle of a polygon
     """
+    if len(points) < 3:
+        raise ValueError("At least three points are required to form a polygon")
+
     area = 0
     min_x = float("inf")
     max_x = float("-inf")
@@ -372,22 +375,19 @@ def polygon_bounding_box_center_and_area(points):
     max_y = float("-inf")
 
     n = len(points)
-    # 计算多边形的面积和质心坐标
     for i in range(n):
         x1 = points[i].x()
         y1 = points[i].y()
         x2 = points[(i + 1) % n].x()
         y2 = points[(i + 1) % n].y()
         area += x1 * y2 - x2 * y1
-        min_x = min(min_x, x1, x2)
-        max_x = max(max_x, x1, x2)
-        min_y = min(min_y, y1, y2)
-        max_y = max(max_y, y1, y2)
 
-    # 计算面积
-    area = abs(area) / 2.0
+        min_x = min(min_x, x1)
+        max_x = max(max_x, x1)
+        min_y = min(min_y, y1)
+        max_y = max(max_y, y1)
 
-    # 计算外接矩形的中心
+    area = abs(area) / 2.0
     center_x = (min_x + max_x) / 2
     center_y = (min_y + max_y) / 2
 
@@ -396,16 +396,8 @@ def polygon_bounding_box_center_and_area(points):
 
 def map_value(x, in_min, in_max, out_min, out_max):
     """
-    将数值x从[in_min, in_max]的范围映射到[out_min, out_max]的范围
-
-    参数:
-    x -- 要映射的数值
-    in_min -- 原始范围的最小值
-    in_max -- 原始范围的最大值
-    out_min -- 新范围的最小值
-    out_max -- 新范围的最大值
-
-    返回:
-    映射后的数值
+    Map the numerical value x from the range of [in_in, in_max] to the range of [out_in, out_max]
     """
+    if in_max == in_min:
+        raise ValueError("in_max and in_min cannot be equal")
     return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min