296 research outputs found
The OZDRAW user's manual / Steven Firth, Michael J. Zyda.
No full textOZDRAW is an interactive figure generation system designed to operate on the IRIS 2400 workstations. The aim of OZDRAW is to provide a powerful, yet friendly, general purpose figure generation system to allow untrained users to produce high quality figures that can be used for presentations, technical papers and academic theses. OZDRAW has been designed so that the user can efficiently operate the system with little or no experience. The system uses pop-up menus to provide the user with the available instructions; menus use text rather than icons to provide an interface that is less ambiguous to the inexperienced user. The system requirements for OZDRAW are: (1) an IRIS 2400 workstation, ideally with three megabytes of memory and a floating-point accelerator, and (2) the IRIS mouse (3) a graphics printer capable of quality graphics production; a laser printer is the preferred printerN0001485WR4B001The work reported herein was supported by Contract from the
Office of Naval Research.http://archive.org/details/ozdrawusersmanua00fir
Rigid Body Dynamics, Inertial Reference Frames, and Graphics Coordinate Systems: A Resolution of Conflicting Conventions and Terminology
No full textMaximum 200 words) 14. SUBJECT TERMS 17. SECURITY CLASSIFICATION OF REPORT 18. SECURITY CLASSIFICATION OF THIS PAGE 19. SECURITY CLASSIFICATION OF ABSTRACT 15. NUMBER OF PAGES 16. PRICE CODE 20. LIMITATION OF ABSTRACT 5. FUNDING ii McGhee, Robert B., Bachmann, Eric R., and Zyda, Michael J
Surface construction from planar contours / Patrick G. Hogan, Michael J. Zyda.
No full textMany scientific and technical endeavors require the reconstruction of a three-dimensional solid from a collection of two-dimensional contours. One method for this reconstruction involves a procedure whereby individual pairs of contours are mapped together to form triangular surface patches. In this paper, we present an algorithm which not only handles mapping situations of simple, closed contours but also mappings of multiple contours per plane and partial contour mappings. Also included is a discussion of the algorithm's limitations and heuristicsfunds provided by the
Chief of Naval Researchsupported by in part by the Foundation
Research Program of the Naval Postgraduate Schoolhttp://archive.org/details/surfaceconstruction00hog
User interface design for two-dimensional polygonally encoded geological survey maps / Joann M. Ammann, Robert B. McGhee, Michael J. Zyda.
No full textThis study presents an overview of a cartographic processing pipeline for the generation and maintenance of polygonally encoded data bases from published U.S. Geological Survey maps. The focus of this research centers on the development of an interactive editing system. The editor, serving as the final step in the overall project, provides the user with the capability to correct and modify dated topographic characteristics. A variety of processing and digitizer induced errors introduced into the data base from previous utility steps can also be corrected. Included is a discussion on the internal indexing scheme used for managing revisions and the techniques and algorithms for updating the data basesfunds provided by the Chief of Naval ResearchSupported in part by the Foundation Research Program of the Naval Postgraduate Schoolhttp://archive.org/details/userinterfacedesign00amm
Parametric representation and polygonal decomposition of curved surfaces / Michael J. Zyda, Robert B. McGhee, and Gary W. Taylor.
No full textA primary goal of a computer graphics system is to provide the user with different views of objects. Sometimes the objects that the user manipulates are simple in nature and can be constructed easily with the primitives provided by the graphics support package. However, in most applications areas the user is concerned with more complex objects. The display of three-dimensional surfaces is one such application area in computer graphics and is the area that this study explores. It is the intent of this study to stimulate the reader's interest in the area of three-dimensional surface generation and display. To provide this stimulation, we combine the power of certain mathematical techniques and a high performance graphics environment to design and implement a set of functions that can be used to create, manipulate, and display three-dimensional solid-filled surfaces. Once developed, the reader will not only be able to use these functions to explore the design, representation, and rendering of such surfaces but also will be able to use these functions in other fields that can benefit from their use such as cartography, robotics, computer vision and artificial intelligenceN0001486WR4B123ACThe work reported herein was supported by the U.S. Army Combat Developments
Experimentation Center, Fort Ord, California and a grant from the Naval
Ocean Systems Center, San Diego, California.http://archive.org/details/parametricrepres00zyd
Two-dimensional polygonal representation of maps for use with autonomous vehicle route planning / Roger K. Diehl, Robert B. McGhee, Michael J. Zyda.
No full textWe present in this study a two-phase approach to the generation and maintenance of a polygonal cartographic database useful for autonomous vehicle route planning. The database is generated non-interactively from available U.S. Geological Survey topographical maps. The database is maintained interactively by a graphics workstation. The focus of this study is on the non-interactive generation of the polygonal database. The non-interactive generation process uses both a set of heuristics derived from the characteristics of paper maps and classical region growing. This study presents a two-phase approach to the digital map production problem. The first phase is a non-interactive phase in which general information is gleaned from a paper topographical map with the use of an image digitizer and computer vision software. The second phase is an interactive one that focuses on the refinement, correction and revision of the map produced in the first phasefunds provided by the Chief of
Naval Researchsupported in part by the Foundation Research
Program of the Naval Postgraduate Schoolhttp://archive.org/details/twodimensionalpoly00die
MODELING AND SIMULATION EDUCATION: IS THERE A NEED FOR GRADUATE DEGREES IN MODELING AND SIMULATION?
No full textProceedings of the 1996 Winter- Sim,ulation Conference ed. J. M. Charnes, D. J. Morrice, D. T. Brunner, and J. J. Swai
Interactive, Networked Moving Platform Simulators
No full texthttp://archive.org/details/interactivenetwo109452230
Robust Multi Sensor Pose Estimation for Medical Applications
No full textIn this paper a sensor fusion for pose estimation
using optical and inertial data is presented. The proposed algorithm
is based on extended Kalman filtering and fuses data from
an optical tracking system and an inertial measurement unit.
These two redundant sensor systems complement each other
well, with the tracking providing absolute position accuracy
and the inertial measurements giving low latency information
of derivatives. Models for both sensors are given respecting the
different sampling times and latencies. Another key issue is to
use information about every landmark, i.e. marker, visible for
the tracking system, by coupling the two sensor systems tightly
together. The algorithms are evaluated in simulation and tested
with an experimental hardware platform. The combined sensor
system provides robust pose estimation in case of short time
marker occlusion and effectively compensates for latencies the
pose measurements
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