Specifically for the iPhone 11 Pro, Phil Schiller previewed an upcoming Deep Fusion feature that analyzes 9 photos (including one long-exposure shot) taken in sequence. The device’s neural engine then analyzes the collection to create an optimal end photo that borrows the best elements of each image. Schiller said it was “computational photography mad science.” Deep Fusion is coming in the fall.
https://www.theverge.com/2019/9/10/20850694/apple-iphone-11-pro-max-camera-specs-features-triple