Indeed; ~half of the technologies listed in their splash image for the "New Image Editing Engine" are Apple-specific: vImage, Accelerate framework, vDSP, Core Animation, ColorSync, Core Image, ...
Some of these have rough equivalents on other platforms, but the interfaces definitely don't line up exactly, so it wouldn't be completely straightforward to shim them. Others simply don't have existing equivalents.
Some of these have rough equivalents on other platforms, but the interfaces definitely don't line up exactly, so it wouldn't be completely straightforward to shim them. Others simply don't have existing equivalents.