Three-dimensional data display on the two-dimensional screen.
Hwang, Ho Sang
Gerba, Alex, Jr.
MetadataShow full item record
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.
RightsCopyright is reserved by the copyright owner.
Showing items related by title, author, creator and subject.
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 ...
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 ...
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 ...