The ability to morph two pictures together is facilitated by software that recognizes the similar features, usually in two photographs that show only the subject’s face. The various facial features are detected, and their edges are found. The two photographs are resized to be equivalent, and the shapes of the features are converted into geometric shapes and then averaged, with the size adjusted. The colors of each element are also averaged, and a new face appears.
There are a variety of ways to combine two pictures: one can make one a transparent GIF and superimpose it on the second; one can cut out an element of one and superimpose it on the second; or one could put them in separate layers of the same file and alter the transparency so that elements of both are in view. Morphing two pictures together is distinctive because it combines the features of the two pictures to create a new picture in which every element is a blend of the originals.
Morphing is most often done with photographs of faces. Unlike other ways of combining two pictures, when photos morph, each facial feature – eyes, nose, mouth, hair, chin, cheeks, brow, etc. – is a blended meshing of the two original photographs. It is also possible to have an animated morph of two pictures. In this case, you see the transition of the two faces into the blended face taking place.