Bibliography
L. Williams. Pyramidal parametrics.  Computer Graphics, 17(3):1--11, July
1983.
L. G. Brown. A survey of image registration techniques.  Computing
Surveys, 24(4):325--376, December 1992.
C. D. Kuglin and D. C. Hines. The phase correlation image alignment
method.  In IEEE 1975 Conference on Cybernetics and Society, pages
163--165, New York, September 1975.
J. Gomes, L. Darsa, B. Costa, and L. Velho. Warping and Morphing of
Graphical Objects.  Morgan Kaufmann, 1999.
T. Beier and S. Neely. Feature-based image metamorphosis. Computer
Graphics (SIGGRAPH'92), 26(2):35--42, July 1992.