Morphing is a special effect in motion pictures and animations that changes (or morphs) one image into another through a seamless transition. Most often it is used to depict one person turning into another through some magical or technological means or as part of a fantasy or surreal sequence. Traditionally such a depiction would be achieved through cross-fading techniques on film. Since the early 1990s, this has been replaced by computer software to create more realistic transitions.
Xmorph and tkmorph are digital image warping programs: they read, write, warp, and dissolve images, and read, write, create, and manipulate control meshes wich determine the warping. Xmorph runs under the X Window System, and can be run as a GIMP plug-in.