alt Hacker News> Persona extracts the mathematical geometry of your face from your selfie and from your passport photo. This isn’t just a picture — it’s a numerical map of the distances between your eyes, the shape of your jawline, the geometry of your features. It’s data that uniquely identifies you. And unlike a password, you can’t change your face if it gets compromised
Is there anything special about a passport photo, or can that be done from any photo of your face?
When I read selfie, I was thinking of one of those motion-based selfies where it's really a short video. And from the video, you can extract those measurements. I'm assuming it wasn't extracted from the passport photo, but rather the passport photo was used to verify that the selfie is of the same person that the passport belongs to.