解決windows10下安裝dlib與face-recognition的問題

以後博客更新內容都會在oldpan.me中
github中相關問題解決方法：https://github.com/ageitgey/face_recognition/issues/175#issue-257710508
對於安裝face-recognition在window的方法，在dlib的github中的issue中已經有人進行了回答，但是回答者較爲複雜，且有些步驟可以簡化一下。

問題原因

安裝face-recognition需要首先安裝dlib
windows無法直接安裝dlib的原因主要是因爲缺少相應的編譯環境，只要安裝好相應的編譯環境即可。

相關軟件

1、VS 2015 C++相關組件，注意，需要的是2015而不是2017，VS2017的相關組件對C++編譯的支持並不好，因此必須下載安裝好VS2015的C++相關組件。
注意：VS 2015 安裝器默認不安裝C++相關組件，需要自己選擇添加安裝！！
2、Boost C++ Libraries，下載好Third Party Downloads-Windows Binaries中的boost_1_66_0-msvc-14.0-64.exe，點擊exe安裝到C盤，到期安裝目錄，點擊b2進行編譯，編譯好的文件放到了stage中。
3、安裝cmake，百度直接安裝即可，cmake在安裝過程中切記選擇添加路徑到環境變量中。

問題解決

安裝好上面說的三個部件後，直接運行pip install face-recognition即可，會將dlib一併安裝。
出現以下信息說明安裝成功。

C:\Users\dell\PycharmProjects\Pytorch-Learn>C:\Users\dell\Anaconda3\envs\my-pytorch\Scripts\pip install face-recognition
Collecting face-recognition
  Using cached https://pypi.tuna.tsinghua.edu.cn/packages/fa/2d/dbb78acb411de238869451afae8387ae8200d3fe0672f6817a918e03ca49/face_recognition-1.0.0-py2.py3-none-any.whl
Requirement already satisfied: Pillow in c:\users\dell\anaconda3\envs\my-pytorch\lib\site-packages (from face-recognition)
Requirement already satisfied: numpy in c:\users\dell\anaconda3\envs\my-pytorch\lib\site-packages (from face-recognition)
Requirement already satisfied: face-recognition-models>=0.2.0 in c:\users\dell\anaconda3\envs\my-pytorch\lib\site-packages (from face-recognition)
Requirement already satisfied: scipy>=0.17.0 in c:\users\dell\anaconda3\envs\my-pytorch\lib\site-packages (from face-recognition)
Collecting dlib>=19.5 (from face-recognition)
  Using cached https://pypi.tuna.tsinghua.edu.cn/packages/23/7a/891d4c46cdf755fb69eec0f06a53033d3754bf68ace5342ad56aeb540aa1/dlib-19.9.0.tar.gz
Requirement already satisfied: Click>=6.0 in c:\users\dell\anaconda3\envs\my-pytorch\lib\site-packages (from face-recognition)
Requirement already satisfied: olefile in c:\users\dell\anaconda3\envs\my-pytorch\lib\site-packages (from Pillow->face-recognition)
Building wheels for collected packages: dlib
  Running setup.py bdist_wheel for dlib ... done
  Stored in directory: C:\Users\dell\AppData\Local\pip\Cache\wheels\5d\94\db\0ddfd06142fc4ee80b89d1e6cd158185a9bf40d93b8d92e2ee
Successfully built dlib
Installing collected packages: dlib, face-recognition
Successfully installed dlib-19.9.0 face-recognition-1.0.0