superimposing
verb
Definitions
To place an object over another object, usually in such a way that both will be visible.
Example: He superimposed the company logo over the image.
To establish a structural system over, independently of underlying structures.
noun
Definitions
The process, or the result of superimposing
The placing of one image on top of another, especially placing a photograph over some other graphic
The building of ontological categories of a higher level on top of categories of a lower level.