DLib人脸探测与人脸识别

一些基本概念

• 人脸探测(Face Detect)

  

• 人脸识别(Face Identify)

  

• 依赖关系

  

  • DLib人脸探测集成和DLib人脸识别依赖于python库face_recognition

  • python库face_recognition使用了DLib C++ Library

  • DLib C++ Library中包含了各种机器学习算法和工具

  在HomeAssistant Core的官方docker镜像中，没有事先安装face_recognition库

在docker中安装依赖库

• 进入HomeAssistant Core的docker容器：

  docker exec -it homeassistant bash

• 查看DLib集成的依赖库

  cat /usr/src/homeassistant/homeassistant/components/dlib_face_detect/manifest.json

• 手工安装依赖库

  sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
  apk add cmake build-base
  pip3 install face_recognition==1.2.3 -i https://mirrors.aliyun.com/pypi/simple/
  

  国外用户可以不运行第一条命令，并且去除第三条命令中的-i https://mirrors.aliyun.com/pypi/simple/部分——这些是用于给国内用户加速的

配置

• configuration.yaml

  # configuration.yaml
  image_processing:
    - platform: dlib_face_detect
      scan_interval: 2
      source:
        - entity_id: camera.c8
          name: face_detect
  
    - platform: dlib_face_identify
      scan_interval: 999999
      source:
        - entity_id: camera.c8
          name: face_id
      faces:
        Andrew: /share/face/andrew.jpg
  
  homeassistant:
    allowlist_external_dirs:
      - /share/face/record/
  

• scripts.yaml

  # scripts.yaml
  face_identify_script:
    alias: 人脸识别并保存图片
    sequence:
      - service: image_processing.scan
        data:
          entity_id: image_processing.face_id
      - service: camera.snapshot
        data:
          entity_id: camera.c8
          filename: /share/face/record/face_{{ now().strftime('%Y%m%d_%H%M%S') }}.jpg
  

自动化

• 当探测到人脸后，就启动face_identify_script

  alias: Face Identify
  description: ''
  trigger:
    - platform: state
      entity_id: image_processing.face_detect
  condition:
    - condition: state
      entity_id: image_processing.face_detect
      state: '1'
  action:
    - service: script.face_identify_script
  mode: single
  

  "State trigger fires when the state of any of given entities changes. If only entity_id is given, the trigger will fire for all state changes, even if only state attributes change. If only one of from_state or to_state are given, the trigger will fire on any matching state change, but not if only attributes change."

• 当确认身份后，可以进行你希望的动作，比如开门

  alias: "Andrew Coming..."
  trigger:
    platform: event
    event_type: image_processing.detect_face
    event_data:
      entity_id: image_processing.face_id
      name: "Andrew"
  ...
  

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