When the iPhone X came along with its Portrait Lighting effects, a lot of people were very impressed. Apple was even claiming that you don’t need studio lighting at all anymore or any other fancy equipment. You just need your phone. And while the iPhone hasn’t taken over as the portrait photographer’s camera of choice, it’s an intriguing concept.
A concept so intriguing that researchers and engineers at UC San Diego and Google have taken it a few steps further. They’ve trained neural networks to relight portraits after the fact without requiring any 3D depth data and with a lot more control than a few Apple presets.