Some good articles on the new ProRaw format added to the iPhone 12 Pro and Pro Max in 14.3:
First up Ben Sandofsky with Halide. One interesting tidbit from this article, turns out there’s a reason the non-Pro iPhone 12 doesn’t support ProRaw:
In the past, these algorithms did their math with lower bit depths, because their output was just low bit depth JPEGs. Outputting images in a higher bit depth requires twice the memory. Apple’s Pro iPhones have twice the memory as non-Pro models, and ProRAW needs all of that.
More from Austin Mann, including some great images taken with ProRaw: