English
资源说明：Image-space simplifications have been used to accelerate
the calculation of computer graphic images since the dawn of
visual simulation. Texture mapping has been used to provide a
means by which images may themselves be used as display
primitives. The work reported by this paper endeavors to carry
this concept to its logical extreme by using interpolated images
to portray three-dimensional scenes. The special-effects
technique of morphing, which combines interpolation of texture
maps and their shape, is applied to computing arbitrary intermediate
frames from an array of prestored images. If the images
are a structured set of views of a 3D object or scene, intermediate
frames derived by morphing can be used to approximate
intermediate 3D transformations of the object or scene. Using
the view interpolation approach to synthesize 3D scenes has
two main advantages. First, the 3D representation of the scene
may be replaced with images. Second, the image synthesis time
is independent of the scene complexity. The correspondence
between images, required for the morphing method, can be predetermined
automatically using the range data associated with
the images. The method is further accelerated by a quadtree decomposition
and a view-independent visible priority. Our experiments
have shown that the morphing can be performed at
interactive rates on today’s high-end personal computers. Potential
applications of the method include virtual holograms, a
walkthrough in a virtual environment, image-based primitives
and incremental rendering. The method also can be used to
greatly accelerate the computation of motion blur and soft
shadows cast by area light sources.
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