Looking for Face capture and image quality assessment SDK

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I am developing a general purpose application that at some point will
capture face image or mug shot of a person.

I am wondering out of curiosity whether:

1. A guideline or standard exist that I have to confom to? For instance
something like passport standard? Appreciate it if URL link to such
guideline can be posted here.

2. Please recommend to me SDK that can help me capture image and assess
captured image quality before proceeding with registration process.

Thanks in advance,

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