在Ubuntu上实现人脸识别登录

1. 安装Howdy: howdy项目地址

   sudo add-apt-repository ppa:boltgolt/howdy
   sudo apt update
   sudo apt install howdy
   

2. 添加自己的face

   sudo howdy add
   

   报错：

   Enter a label for this new model [Initial model] (max 24 characters): tiger
   Camera path is not configured correctly, please edit the 'device_path' config value.
   Exception ignored in: <bound method VideoCapture.__del__ of <recorders.video_capture.VideoCapture object at 0x7f6bc5be02b0>>
   Traceback (most recent call last):
     File "/lib/security/howdy/recorders/video_capture.py", line 55, in __del__
       self.internal.release()
   AttributeError: 'VideoCapture' object has no attribute 'internal'
   
   

   解决方案:

   $ sudo apt-get install v4l-utils
   # 查看摄像头路径
   $ v4l2-ctl --list-devices
   USB 2.0 Camera: USB Camera (usb-0000:03:00.0-14):
   	/dev/video0
   $ sudo howdy config
   # 接下来更改config中的device_path = /dev/video0
   
   

   $ sudo howdy add
   Adding face model for the user tiger
   Enter a label for this new model [Initial model] (max 24 characters): tiger
   
   Please look straight into the camera
   Scan complete
   
   Added a new model to tiger
   

   1. 测试

      打开一个terminal

   $ sudo -i
   Identified face as tiger
   

   $ sudo howdy test
   
   Opening a window with a test feed
   
   Press ctrl+C in this terminal to quit
   Click on the image to enable or disable slow mode
   
   Closing window
   
   

   1. 屏幕锁屏后，enter进入输密码界面，程序就会识别出人，直接解锁。

   2. 其它命令

      Usage:

      howdy [-U user] [-y] command [argument]
      

      Command	Description
      add	Add a new face model for an user
      clear	Remove all face models for an user
      config	Open the config file in your default editor
      disable	Disable or enable howdy
      list	List all saved face models for an user
      remove	Remove a specific model for an user
      snapshot	Take a snapshot of your camera input
      test	Test the camera and recognition methods
      version	Print the current version number