The Wolfram Language includes various image compositing and digital composition techniques, from simple image arithmetic to various modes of alpha compositing. A variety of algorithms in the fields of segmentation, filtering, and feature extraction are also built into the Wolfram Language and can be used to generate different layers of composition.
ImageCompose — create an image composite
Blend — blend two or more images
ImageApply — combine multiple images using a general function
ImageCollage — create an image collage
HighlightImage — highlight a part of an image
RemoveBackground — detect and replace image background with transparency