openposeのgithubのインストール

Question

サイト内容
上記のサイトをインストールしています。

実行コード
pip3 install -r requirements.txt --user

エラー
 ERROR: Command errored out with exit status 1:
     command: 'c:\program files\python37\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\yusmi\AppData\Local\Temp\pip-install-t3yi_74j\pycocotools\setup.py'"'"'; __file__='"'"'C:\Users\yusmi\AppData\Local\Temp\pip-install-t3yi_74j\pycocotools\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\yusmi\AppData\Local\Temp\pip-record-zxg69whp\install-record.txt' --single-version-externally-managed --compile --user --prefix=
         cwd: C:\Users\yusmi\AppData\Local\Temp\pip-install-t3yi_74j\pycocotools\
    Complete output (18 lines):
    running install
    running build
    running build_py
    creating build
    creating build\lib.win-amd64-3.7
    creating build\lib.win-amd64-3.7\pycocotools
    copying pycocotools\coco.py -> build\lib.win-amd64-3.7\pycocotools
    copying pycocotools\cocoeval.py -> build\lib.win-amd64-3.7\pycocotools
    copying pycocotools\mask.py -> build\lib.win-amd64-3.7\pycocotools
    copying pycocotools\__init__.py -> build\lib.win-amd64-3.7\pycocotools
    running build_ext
    building 'pycocotools._mask' extension
    creating build\temp.win-amd64-3.7
    creating build\temp.win-amd64-3.7\Release
    creating build\temp.win-amd64-3.7\Release\pycocotools
    creating build\temp.win-amd64-3.7\Release\common
    cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -IC:\Users\yusmi\AppData\Roaming\Python\Python37\site-packages\numpy\core\include -Icommon "-Ic:\program files\python37\include" "-Ic:\program files\python37\include" /Tcpycocotools/_mask.c /Fobuild\temp.win-amd64-3.7\Release\pycocotools/_mask.obj -Wno-cpp -Wno-unused-function -std=c99
    error: command 'cl.exe' failed: No such file or directory
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\program files\python37\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\yusmi\AppData\Local\Temp\pip-install-t3yi_74j\pycocotools\setup.py'"'"'; __file__='"'"'C:\Users\yusmi\AppData\Local\Temp\pip-install-t3yi_74j\pycocotools\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\yusmi\AppData\Local\Temp\pip-record-zxg69whp\install-record.txt' --single-version-externally-managed --compile --user --prefix= Check the logs for full command output.

エラーが消えると他のエラーが発生してしまうを繰り返しているので、エラーの解説をお願いしたいです。よろしくお願いいたします。