https://techcrunch.com/2018/10/30/googles-gboard-now-lets-you-create-a-set-of-emoji-that-look-like-you/

Last summer, Google introduced its own take on Bitmoji with the launch of “Mini” stickers in its keyboard app, Gboard, which leverage machine learning to create illustrated stickers based on your selfie. Today, Google is expanding the Mini Stickers with the launch of what it calls “Emoji Minis” – meaning, emoji-sized stickers that look like you.

Similar to the initial launch of Mini stickers, the new emoji are also created using machine learning techniques, Google says.