The data types and constants defined in this document are used by vImage functions. The primary vImage data type is the
v, which contains a pointer to image data along with other image data information. The vImage framework also defines data types for planar and interleaved pixel types, a resampling callback filter, and an affine transform. It provides constants that specify errors that can be returned by vImage functions and flags that you can pass to a function to specify a variety of processing options.