How the iPhone's Portrait Mode creates its fake Bokeh HD

With the advent of MACHINE LEARNING, the iPhone gets a portrait mode. But how does it work? Stock images: Hasselblad - By Ida Gustaf (Own work) [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons Canon - By decltype (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons Camera Sensor - By 根川孝太郎 (Kotaro Negawa) (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons Olympus Lens - By Petar Milošević (Own work) [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons Music: Good Morning by LAKEY INSPIRED https://soundcloud.com/lakeyinspired Creative Commons — Attribution-ShareAlike 3.0 Unported— CC BY-SA 3.0 http://creativecommons.org/licenses/b... Music provided by Music for Creators https://youtu.be/RH1gC45vlMc