Updates an image accumulator with a subregion of an image object.
- iOS 9.0+
- macOS 10.4+
- Mac Catalyst 13.0+
- tvOS 9.0+
- Core Image
The image object whose contents you want to assign to the image accumulator.
A rectangle that defines the subregion of the image object that’s changed since the last time you updated the image accumulator. You must guarantee that the new contents differ from the old only within the region specified by the this argument.
For additional details on using this method, see “Imaging Dynamical Systems” in Core Image Programming Guide.