摘要：
请输入“设备_路径”配置值。异常ignoredin:$sudoapt getinstallv4l utils#查看相机路径$v4l2 ctl--列出设备USB2.0相机：
安装Howdy: howdy项目地址
sudo add-apt-repository ppa:boltgolt/howdy sudo apt update sudo apt install howdy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。
其它命令
Usage:
howdy [-U user] [-y] command [argument]Command Description addAdd a new face model for an user clearRemove all face models for an user configOpen the config file in your default editor disableDisable or enable howdy listList all saved face models for an user removeRemove a specific model for an user snapshotTake a snapshot of your camera input testTest the camera and recognition methods versionPrint the current version number