python利用opencv实现人脸在眨眼和张嘴以及左右脸时对起拍照保存并注册和识别改人脸的完整代码
时间: 2024-09-07 21:01:36 浏览: 105
在Python中,结合OpenCV库实现人脸识别、眨眼检测、嘴巴动作识别等功能,并将特定的人脸照片保存并进行注册和识别,需要一些步骤和库的配合。以下是简化的示例代码,包含了基本框架,实际项目中可能还需要更多的图像处理技术和机器学习模型(如Haar cascades for face detection,OpenFace或dlib库用于特征点检测和表情分析,face_recognition库用于人脸识别等)。请注意,这个示例并没有包含完整的注册和识别过程,因为那通常涉及到数据库操作和算法训练。
```python
import cv2
import dlib
import numpy as np
from imutils import face_utils
from time import time
# 加载预训练的人脸检测模型
detector = dlib.get_frontal_face_detector()
predictor = dlib.shape_predictor("shape_predictor_68_face_landmarks.dat")
# 检测人脸并标记关键点
def detect_faces(frame):
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
faces = detector(gray)
return faces, predictor(gray, faces)
# 眨眼检测 (简化版)
def blink_detection(eye_points):
# 计算上下眼睑距离
left_blink_threshold = 0.25 # 可能需要调整阈值
right_blink_threshold = 0.25
for i in (48, 54): # 上下眼睑的关键点
if eye_points.part(i).y < eye_points.part(i + 1).y:
if abs(eye_points.part(i).x - eye_points.part(i + 1).x) > left_blink_threshold:
return "left"
elif abs(eye_points.part(i).x - eye_points.part(i + 1).x) > right_blink_threshold:
return "right"
# 张嘴检测 (这里假设嘴巴打开程度作为指标,可根据具体需求修改)
def mouth_openness(mouth_points):
jaw_left = mouth_points.part(48)
jaw_right = mouth_points.part(60)
max_y = max(jaw_left.y, jaw_right.y)
min_y = min(jaw_left.y, jaw_right.y)
openness = max_y - min_y
return openness
# 主函数
def main():
cap = cv2.VideoCapture(0) # 使用默认摄像头
while True:
_, frame = cap.read()
faces, landmarks = detect_faces(frame)
for face in faces:
landmarks = face_utils.shape_to_np(predictor(frame, face))
eye_direction = blink_detection(landmarks)
mouth_openness_value = mouth_openness(landmarks)
# 根据条件展示图片或做其他操作
# 简化示例,这里仅在有动作发生时显示
if eye_direction or mouth_openness_value > threshold:
cv2.rectangle(frame, (face.left(), face.top()), (face.right(), face.bottom()), (0, 255, 0), 2)
cv2.putText(frame, f"Eye direction: {eye_direction} | Mouth: {'open' if mouth_openness_value else 'closed'}",
(10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.9, (0, 0, 255))
cv2.imshow("Face Detection", frame)
key = cv2.waitKey(1)
if key == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
if __name__ == "__main__":
main()
# 相关问题--
1. 如何使用OpenCV实现更精确的人脸识别?
2. 如何将上述代码扩展到多人同时识别?
3. 需要哪些额外的库来进行复杂的人脸特征提取和注册?
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