This work was supported by NSF grant CCR-9102553. Partial support for this work was provided by the Directorate for Computer and Information Science and Engineering, NSF Grant No. CDA-8805910. We also used equipment at the Computer Science Department and Rensselær Design Research Center at RPI. Financial support for research to date has been provided by the U.S. Army Topographic Engineering Center, Ft. Belvoir, Virginia. Some equipment and software have been provided by the Department of Electrical Engineering and Computer Science, U.S. Military Academy, West Point, New York. Some work was done at the Division of Information Technology, Commonwealth Scientific and Industrial Research Organization, Canberra, Australia.
John Bradley's excellent image processing program XV was used for much of the image postprocessing and display. Jef Poskanzer's Portable BitMap (PBM) suite of conversion utilities was also valuable.
The views, opinions, and/or other findings contained in this report are those of the authors and should not be construed as an official National Science Foundation or Department of the Army position, policy, or decision, unless so designated by other documentation.