Three-Dimensional Data Display on the Two-Dimensional Screen.
Abstract
The difficulties encountered when implementating orthographic reprojection of 3-dimensional image data onto a 2-dimensional screen 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 thesis, implementation was performed with an orthographic reprojection technique and many heuristic approaches were used to resolve some of the related problems. Of the several coordinate rotating algorithms tested, the Precalculation and Indexing algorithm proved to be the most efficient. Due to the disparity of the viewing-coordinate grids and the voxels of the volume data after rotation, 3-dimensional interpolation is required for applying the reprojection technique. Several methods implementing linear interpolation were tried. Interpolation with a cone-shape kernel is the most appropriate 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 artificial test data are collected using the above algorithms. Several resulting images are included as well as the associated PASCAL programs. Keywords include: Image rotation, Image projection, Dissection, and Dissolution.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA153699
Entities
People
- H. S. Hwang
Organizations
- Naval Postgraduate School