https://techcrunch.com/2023/09/12/portrait-mode-gets-an-upgrade-on-the-iphone-15/

Portrait Mode wowed us when it debuted with the iPhone 7 Plus, all the way back in 2016. With its two lenses (remember when iPhones had one camera?), the 7 Plus could detect 9 levels of depth, then apply blur to some of the layers to create an image that looks like it was taken with a DSLR. Eight whole iPhone generations later, Portrait Mode is getting a facelift.

On the iPhone 15, your camera app can use machine learning to determine when there’s a person in the frame, then automatically switch to portrait mode. This feature also recognizes pets, and we know people love to take way too many photos of their pets.