Information
- Publication Type: Technical Report
- Workgroup(s)/Project(s): not specified
- Date: March 1995
- Number: TR-186-2-95-05
- Keywords: ray tracing, distortion camera, projection, image generation
Abstract
Ray tracing is a powerful technique for realistic image
generation. Typically a simple camera definition is used,
whereby a 3D environment is mapped onto an image plane
either by an orthographic or perspective projection. The
concept of the usual simple camera definition is extended
in several ways to achieve distorted views or projections
of the object scene. The origins of primary rays are not
required to lie on a plane anymore. Thus projections onto
curved image surfaces are possible. The directions of
primary rays may be chosen according to various nonlinear
functions that allow nonstandard projections of the
environment. The concept of centers of interest (coins) is
introduced that enables to concentrate on especially
interesting portions of object space. A center of interest
is a 3D position that either distorts (attracts) a portion
of the image surface or locally influences the directions
of primary rays. The results of a test implementation are
presented to show the feasibility of the methods presented.
Several applications of distorted images are: creating
elemental holographic images and raster omnimax images,
virtual reality and arts.
Additional Files and Images
Weblinks
No further information available.
BibTeX
@techreport{Acquisto-1995-DCR,
title = "A Distortion Camera for Ray Tracing",
author = "Pietro Acquisto and Meister Eduard Gr\"{o}ller",
year = "1995",
abstract = "Ray tracing is a powerful technique for realistic image
generation. Typically a simple camera definition is used,
whereby a 3D environment is mapped onto an image plane
either by an orthographic or perspective projection. The
concept of the usual simple camera definition is extended in
several ways to achieve distorted views or projections of
the object scene. The origins of primary rays are not
required to lie on a plane anymore. Thus projections onto
curved image surfaces are possible. The directions of
primary rays may be chosen according to various nonlinear
functions that allow nonstandard projections of the
environment. The concept of centers of interest (coins) is
introduced that enables to concentrate on especially
interesting portions of object space. A center of interest
is a 3D position that either distorts (attracts) a portion
of the image surface or locally influences the directions of
primary rays. The results of a test implementation are
presented to show the feasibility of the methods presented.
Several applications of distorted images are: creating
elemental holographic images and raster omnimax images,
virtual reality and arts.",
month = mar,
number = "TR-186-2-95-05",
address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
institution = "Institute of Computer Graphics and Algorithms, Vienna
University of Technology ",
note = "human contact: technical-report@cg.tuwien.ac.at",
keywords = "ray tracing, distortion camera, projection, image generation",
URL = "https://www.cg.tuwien.ac.at/research/publications/1995/Acquisto-1995-DCR/",
}