Focus is a proof of concept app that explores iOS' Photos Framework, which allows us to request assets and commit edits to the photo library.
Designers Patrick Wong, Brian Bailey, and Nico Bories fetched, presented, and stored images in a custom collection using a nondestructive image adjustment process that allow users to revert or alter their edits.
Our custom editing allows controls for brightness, saturation, contrast, cropping, rotation, and temperature.
iOS 8 Photos Framework
iOS Developer Library Core Image Programming Guide (deprecated)