face_recognition是一个强大、简单、易上手的人脸识别开源项目，并且配备了完整的开发文档和应用案例，特别是兼容树莓派系统。非常最简洁的人脸识别库，使用和安装都非常简单，可以使用Python和命令行工具提取、识别、操作人脸。
开源：https://github.com/ageitgey/face_recognition
pip3 install face_recognition
import face_recognition
# 检测
image = face_recognition.load_image_file("your_file.jpg")
face_locations = face_recognition.face_locations(image)
# 关键点
image = face_recognition.load_image_file("your_file.jpg")
face_landmarks_list = face_recognition.face_landmarks(image)
# 识别
known_image = face_recognition.load_image_file("biden.jpg")
unknown_image = face_recognition.load_image_file("unknown.jpg")
biden_encoding = face_recognition.face_encodings(known_image)[0]
unknown_encoding = face_recognition.face_encodings(unknown_image)[0]
results = face_recognition.compare_faces([biden_encoding], unknown_encoding)
