Three-dimensional data display on the two-dimensional screen.
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Authors
Hwang, Ho Sang
Subjects
Image Rotation
Image Projection
Dissection
Dissolution
Linear Interpolation
Image Projection
Dissection
Dissolution
Linear Interpolation
Advisors
Lee, Chin-Hwa
Date of Issue
1984
Date
December 1984
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The difficulties encountered when implement at ing orthographic
reprojection of 3-dimensional image data onto a
2-dimensional screen are considerable. They arise principally
because of the size of data being manipulated and the
tendency for underlying or overlying structures to obscure a
clear view of the desired image. In this work, implementation
was performed with an orthographic reprojection technique
and many heuristic approaches were used to resolve
some of the related problems. Several coordinate rotating algorithms were tested in
this work. Among them the Precalculation and Indexing
method proved to be the most efficient algorithm.
Due to the disparity of the viewing- coordinate grids and
the voxels of the volume data after rotation, 3-dimensional
interpolation is required for appling the reprojection technique.
Several methods implementing linear interpolation
have been tried. Interpolation with a cone-shape kernel is
the most appropriate method in the 2D situations and can be
easily extended to a sphere-shape kernel in 3D situations.
The orthographic reprojection method includes a single
plane dissection capability. Results on an artificial test
data are collected using the above algorithms.
Several resulting images are included as well as the
associated PASCAL programs.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering
Organization
Identifiers
NPS Report Number
Sponsors
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Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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