1、本地调用摄像头拍照
https://blog.csdn.net/SilverDragonFLM/article/details/80418438?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase
2、OpenCV摄像头拍照
该部分设置完成之后，要用
sudo reboot //重启树莓派https://blog.csdn.net/Deiki/article/details/71123947
3、树莓派开关机命令
https://www.jianshu.com/p/a5fd6d2e4189