The Collaborative International Dictionary of English v.0.48:
morphing \morph"ing\ (m[^o]rf"[i^]ng), n. (Computers)
The smooth transformation of one shape or image into another,
displayed on the computer screen as a series of images that
appear to be continuous, as if in a movie.
The Free On-line Dictionary of Computing (30 December 2018):
The animated transformation of one image into
another by gradually distorting the first image so as to move
certain chosen points to the position of corresponding points
in the second image.