E. Gröller and
H. Löffelmann:
Extended camera specification for image synthesis
1994,
Machine
Graphics & Vision
3(3),
pp. 514-530.
Abstract
Typically a rather simple definition of the viewing parameters
(e.g., perspective projection) is used for ray tracing, which
is one of the most powerful rendering techniques for generating
realistic images. In this paper this simple camera model is
extended in several ways to increase user flexibility. A sequence
of mappings defines a more general way to assign 3d rays for each
pixel of the final raster image. These rays are then taken as
primary rays in the following ray tracing step. An extended camera
specification, for example, allows the projection of the object
scene onto more general projection surfaces (quadrics, free form
surfaces). Different views of the same object scene may be
incorporated within one single image. A test implementation and
sample images show the feasibility of the approach. The extended
camera specification enables more elaborate viewing techniques
which may be used, e.g., for virtual reality, arts and special
effects.
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helwig löffelmann,
technical university of vienna.