From c70ca9d35cb71ced955abf0f29575cc2b2bc9ffe Mon Sep 17 00:00:00 2001
From: Tian jianyong <11429339@qq.com>
Date: Thu, 18 Dec 2025 17:05:43 +0800
Subject: [PATCH] =?UTF-8?q?=E9=80=82=E9=85=8D=E4=BA=8C=E7=BB=B4=E7=A0=81?=
 =?UTF-8?q?=E7=94=BB=E9=9D=A2?=
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---
 face_rec.py | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/face_rec.py b/face_rec.py
index 61f3b10..99e5ea5 100644
--- a/face_rec.py
+++ b/face_rec.py
@@ -699,17 +699,16 @@ class FaceRecognitionSystem:
             try:
                 import screeninfo
                 screen = screeninfo.get_monitors()[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
+                canvas_width = int(screen.width)
+                canvas_height = int(screen.height)
+                x_pos = 0
+                y_pos = 0
             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, 1960)
-                canvas_height = max(qr_height, 1120)
-                x_pos = -20
-                y_pos = -20
+                canvas_width = max(qr_width * 2, 1920)
+                canvas_height = max(qr_height, 1080)
+                x_pos = 0
+                y_pos = 0
 
             rendered = self._build_qrcode_instruction_canvas(qr_image, (canvas_width, canvas_height))
             if rendered is None:
@@ -719,8 +718,17 @@ class FaceRecognitionSystem:
                 scale = min(scale_width, scale_height)
                 new_width = int(qr_width * scale)
                 new_height = int(qr_height * scale)
-                rendered = cv2.resize(qr_image, (new_width, new_height), interpolation=cv2.INTER_LINEAR)
-                canvas_width, canvas_height = new_width, new_height
+                resized_qr = cv2.resize(qr_image, (new_width, new_height), interpolation=cv2.INTER_LINEAR)
+                
+                # 创建黑色背景画布，完全填充屏幕
+                rendered = np.zeros((canvas_height, canvas_width, 3), dtype=np.uint8)
+                
+                # 计算居中位置
+                x_offset = (canvas_width - new_width) // 2
+                y_offset = (canvas_height - new_height) // 2
+                
+                # 将二维码放在中央
+                rendered[y_offset:y_offset+new_height, x_offset:x_offset+new_width] = resized_qr
 
             cv2.resizeWindow(self.qrcode_window_name, canvas_width, canvas_height)
             cv2.moveWindow(self.qrcode_window_name, x_pos, y_pos)