[auganov]

Isn't OpenCV [and stuff on top of it] fairly simple for face recognition already?

[gmuslera]

Probably what will matter is not just detecting your face, but what you do with that, like https://github.com/thearn/webcam-pulse-detector

Anyway, would go a bit forward into computer vision/opencv, not just face detection, but body/objects detection using that information to build things.