From fd5aedb3f9437617d2b6be49d4859a21c63bf94a Mon Sep 17 00:00:00 2001
From: Tian jianyong <11429339@qq.com>
Date: Sun, 28 Dec 2025 17:48:04 +0800
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---
 config.yaml |  4 ++--
 face_rec.py | 21 +++++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/config.yaml b/config.yaml
index 6bc9f4a..154653e 100644
--- a/config.yaml
+++ b/config.yaml
@@ -41,11 +41,11 @@ camera:
 face_detection:
   frame_interval: 10  # 检测帧间隔(每N帧检测一次)
   quality_threshold: 10  # 图像质量阈值(Laplacian方差)
-  min_face_size: 80  # 最小人脸尺寸(像素)
+  min_face_size: 60  # 最小人脸尺寸(像素)，越小检测距离越远
   face_present_duration: 2.0  # 持续出现时长(秒)才触发识别
   max_yaw: 20.0  # 最大允许的偏航角(度)，超过此角度视为侧脸
   max_pitch: 20.0  # 最大允许的俯仰角(度)，超过此角度视为抬头或低头
-  no_face_threshold: 30  # 人脸消失计数器阈值(帧)，连续N帧没有检测到人脸才清空
+  no_face_threshold: 60  # 人脸消失计数器阈值(帧)，约2秒没有检测到人脸才清空
 
 # 人脸识别配置
 face_recognition:
diff --git a/face_rec.py b/face_rec.py
index c0e64dd..2c4f37a 100644
--- a/face_rec.py
+++ b/face_rec.py
@@ -1815,9 +1815,30 @@ class FaceRecognitionSystem:
                 # 镜像翻转：使画面与实际场景一致（在绘制信息之前）
                 frame = cv2.flip(frame, 1)
 
+                # 调整人脸框坐标以适应镜像翻转
+                if self.display_info['face_box']:
+                    h, w = frame.shape[:2]
+                    box = self.display_info['face_box']
+                    x_min = int(box['x_min'])
+                    x_max = int(box['x_max'])
+                    # 水平翻转坐标：new_x = width - 1 - old_x
+                    self.display_info['face_box']['x_min'] = w - 1 - x_max
+                    self.display_info['face_box']['x_max'] = w - 1 - x_min
+
                 # 绘制信息
                 display_frame = self.draw_info_on_frame(frame)
 
+                # 绘制人脸轮廓引导框（屏幕中央）
+                h, w = display_frame.shape[:2]
+                center_x = w // 2
+                center_y = h // 2
+                # 椭圆参数：中心点、长轴、短轴、旋转角度、起始角度、结束角度
+                cv2.ellipse(display_frame, (center_x, center_y), (120, 160), 0, 0, 360, (0, 200, 0), 2)
+
+                # 添加提示文字
+                cv2.putText(display_frame, "请将脸部对准圆圈内", (center_x - 100, center_y + 200),
+                           cv2.FONT_HERSHEY_SIMPLEX, 0.8, (0, 200, 0), 2)
+
                 # 使用缓存的屏幕尺寸拉伸视频帧到全屏
                 display_frame = cv2.resize(display_frame, (self.screen_width, self.screen_height), interpolation=cv2.INTER_LINEAR)