Three-dimensional data display on the two-dimensional screen.

Download
Author
Hwang, Ho Sang
Date
1984Advisor
Lee, Chin-Hwa
Second Reader
Gerba, Alex, Jr.
Metadata
Show full item recordAbstract
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.
Rights
Copyright is reserved by the copyright owner.Collections
Related items
Showing items related by title, author, creator and subject.
-
Area-efficient and volume-efficient algorithms for loading cargo
DeSha, Ernest Larry (Monterey, California; Naval Postgraduate School, 1970-09);The proposed greater reliance upon airlifting military forces demands that cargo loading time be minimized while utilization of aircraft cargo compartment space is maximized. Two loading algorithms have been developed ... -
Two-dimensional heat conduction in metal, fluid composites
Gomori, Michael Andrew (1985-12);Filmwise condensation of steam on externally-finned tubes is a very complex process. Recent experiments have shown that enhancement ratios (ratio of steam-side heat-transfer coefficient to that of a smooth tube having ... -
NPSNET: JANUS-3D Providing three-dimensional displays for a traditional combat model
Walter, Jon Curtis; Warren, Patrick Theron (Monterey, California. Naval Postgraduate School, 1992-09);This work involves integrating the Army's existing combat modeling tool, JANUS, with the real-time three-dimensional graphics display offered by NPSNET. The development of a portable software package that can create a ...