Real-Time Face Detection is a project of face detection on a specific picture or real-time stream/video. Video capture is made using the open source Computer Vision (OpenCV) library, which provides necessary instruments.
Also, there is another way to analyze a picture/stream: using CNN, but in this case it’s necessary to build your own neural network.
The usage of RTFD is similar to a fingerprint – allows access for personal and sensitive things such as bank cards, passports (including international ones), bank accounts, etc; biometric border checks in some airports; speeding up hotel checks-in; security checking at events.