适应屏幕分辨率

face_rec.py

@@ -699,16 +699,17 @@ class FaceRecognitionSystem:
             try:
                 import screeninfo
                 screen = screeninfo.get_monitors()[0]
-                canvas_width = int(screen.width)
-                canvas_height = int(screen.height)
-                x_pos = 0
-                y_pos = 0
+                # 添加额外边距确保完全覆盖屏幕
+                canvas_width = int(screen.width + 40)
+                canvas_height = int(screen.height + 40)
+                x_pos = -20  # 负偏移量居中
+                y_pos = -20
             except Exception as e:
                 self.logger.warning(f"无法获取屏幕信息,使用默认尺寸: {e}")
-                canvas_width = max(qr_width * 2, 1920)
-                canvas_height = max(qr_height, 1080)
-                x_pos = 0
-                y_pos = 0
+                canvas_width = max(qr_width * 2, 1960)
+                canvas_height = max(qr_height, 1120)
+                x_pos = -20
+                y_pos = -20
 
             rendered = self._build_qrcode_instruction_canvas(qr_image, (canvas_width, canvas_height))
             if rendered is None: