python识别视频人脸源代码
时间: 2024-10-09 14:08:44 浏览: 59
在Python中,常用的人脸检测库是`OpenCV`(Open Source Computer Vision Library),它结合了`dlib`库的人脸检测功能,如Haar级联分类器或MTCNN(Multi-task Cascaded Convolutional Networks)。以下是基本步骤和一个简单的示例:
```python
import cv2
from imutils import face_utils
# 加载预训练的人脸分类器
face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')
def detect_faces(video_path):
cap = cv2.VideoCapture(video_path)
while True:
ret, frame = cap.read()
# 如果读取帧成功
if ret:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# 使用级联分类器检测人脸
faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5, minSize=(30, 30))
if len(faces) > 0:
for (x, y, w, h) in faces:
cv2.rectangle(frame, (x, y), (x+w, y+h), (255, 0, 0), 2)
# 提取并显示人脸区域
face_roi = frame[y:y+h, x:x+w]
cv2.imshow('Face Detection', face_roi)
# 按'q'键退出循环
if cv2.waitKey(1) & 0xFF == ord('q'):
break
else:
print("No face detected.")
# 关闭视频文件并在所有窗口关闭后退出
else:
cap.release()
cv2.destroyAllWindows()
break
detect_faces('your_video.mp4') # 替换为你需要检测的视频路径
```