Next: Introduction
Feature-Based Volume Metamorphosis
Apostolos Lerios, Chase D. Garfinkle, Marc Levoy
Abstract:
Image metamorphosis, or image morphing, is a popular technique
for creating a smooth transition between two images. For synthetic
images, transforming and rendering the underlying three-dimensional
(3D) models has a number of advantages over morphing between two
pre-rendered images. In this paper we consider 3D metamorphosis
applied to volume-based representations of objects. We discuss the
issues which arise in volume morphing and present a method for
creating morphs. Our morphing method has two components: first a
warping of the two input volumes, then a blending of the resulting
warped volumes. The warping component, an extension of Beier and
Neely's image warping technique to 3D, is feature-based and allows
fine user control, thus ensuring realistic looking intermediate
objects. In addition, our warping method is amenable to an efficient
approximation which gives a 50 times speedup and is computable to
arbitrary accuracy. Also, our technique corrects the ghosting problem
present in Beier and Neely's technique. The second component of the
morphing process, blending, is also under user control; this
guarantees smooth transitions in the renderings.
CR Categories: I.3.5 [Computer Graphics]: Computational
Geometry and Object Modeling; I.3.7 [Computer Graphics]:
Three-Dimensional Graphics and Realism.
Additional Keywords: Volume morphing, warping, rendering;
sculpting; shape interpolation, transformation, blending; computer
animation.
Last update: 11 May 1995 by Apostolos "Toli" Leriostolis@cs.stanford.edu