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Articles and Reports
Here are some very interesting reports and articles written about PhotoModeler. The first set contains accuracy studies. The second set contains application stories.
Accuracy Studies
PhotoModeler is the most precise general-purpose close-range photogrammetry software in the world. PhotoModeler is a tool for producing models and measurements so this is very important! Below we have a number of independent 3rd party accuracy tests and one internal study. The results speak for themselves.
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Accuracy Study on Photogrammetry of a 5m Inflatable Space Antenna With Consumer Digital Cameras
By Richard S. Pappa, NASA Langley Research Center, Louis R. Giersch, George Washington University and Jessica M. Quagliaroli, University of Connecticut, USA
NASA's Gossamer Spacecraft Initiative has been evaluating optical structural testing and validation, with the leading candidate technology being photogrammetry. This paper discusses photogrammetric measurements of a 5m-diameter inflatable space antenna using four Kodak DC290 (2.1 megapixel) digital cameras.
The study had two objectives: to determine the photogrammetric measurement precision obtained using multiple consumer-grade digital cameras, and to gain experience with new commercial photogrammetry software packages, specifically PhotoModeler Pro from Eos Systems, Inc.
[Complete study] -  772KB pdf
One part in 300,000. Precision and Accuracy Discussion
By Alan Walford, Founder, Eos Systems Inc.
We conducted an experiment to determine PhotoModeler’s precision using commonly available and reasonably priced equipment. We demonstrate that any customer can achieve very high precision with PhotoModeler Pro 5. In addition we discuss two common terms, Precision and Accuracy, and why they are important to understand. [Complete study] - 60KB pdf
3D Measurement Accuracy of a Consumer-Grade Digital Camera and Retro-Reflective Survey Targets
By Mike Fedak, InSpec Engineering Services, West Vancouver Canada
Mike Fedak performed a study to investigate the accuracy of a measurement system using PhotoModeler Pro, a consumer-grade digital camera, and retro-reflective targets.
[Complete study] - 378KB pdf
Accuracy Study Project of Eos Systems' PhotoModeler
By Dr. Klaus Hanke, University of Innsbruck, Austria
Dr. Hanke did a sample architectural-like measurement project with two different cameras; a 35mm film camera scanned on a flatbed office scanner and a medium format metric camera scanned with Pro-PhotoCD. This study in its entirety is available in PDF here.
[Complete study] - 336KB pdf |
Application Studies
PhotoModeler is a tool for many applications. Here are some of the interesting studies and application papers where PhotoModeler has been an integral part of the solution.
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Developing a Photogrammetry Based System for Measuring As Assembled Suspension Geometry
By Andre D. Powell, Colorado State University, Department of Mechanical Engineering
A measurement system based on photogrammetry was developed and used to measure the "as assembled" geometry of a double wishbone suspension. A standard methodology for photographing the suspension and special targets were developed to use with commercial photogrammetry software (Photomodeler Pro 5). Several types of targets were developed; these included targets to identify the center of rotation of the linkages and the orientation of the wheel mounting surface. ...
[Complete study] - 951KB pdf
Photographs Generate Accurate Field Measurements
Offshore Magazine
By Frank Hartley
Another method to collect field measurements for equipment in the field, and a direct way to generate new 3D CAD models, is to take some pictures. Shan Pehlman, design engineer with CDI Corp., says he derives accurate measurements from ordinary photographs through desktop software called PhotoModeler, developed by Eos Systems Inc. When consulting with oil refineries on replacing an aging pipeline, as-built drawings of the old infrastructure may not be available for his reference ...
[Complete study]
Semi-Automated Crush Determination Using Coded and Non-Coded Targets with Close-Range Photogrammetry
Accident Reconstruction Network
By Dan Mills and Gary Carty, DCM Technical Services Inc.
Vehicle crush measurement (which is typically used to determine vehicle speed (or change in velocity : delta-v) at time of impact) has traditionally been done with tape measure or a surveyor's total station. Mills and Carty demonstrate a method which is low cost, flexible, automated and accurate using PhotoModeler and PhotoModeler's coded targets.
[Complete study] - 2.1MB pdf
Photogrammetric techniques for analyzing displacement, strain, and structural geometry in physical models: Application to the growth of monoclinal basement uplifts
Geological Society of America Journal
By Mark Fischer and David Keating, Department of Geology and Environmental Geosciences, Northern Illinois University, DeKalb, Illinois
Using physical clay models scientists can study tectonic processes that take millions of years to occur naturally. The use of these physical models is not widespread because their construction and analysis is commonly labor-intensive work that yields largely qualitative information. Through the use of PhotoModeler the authors demonstrate the measurement of these models in an automated and highly quantitative manner.
[Complete Study]
Person identification by gait analysis and photogrammetry
Journal of Forensic Sciences
By N. Lynnerup, Institute of Forensic Medicine, University of Copenhagen, Denmark, and J. Vedel, 3D Photo, Aarhus, Denmark.
Using PhotoModeler and surveillance video, the authors perform measurements of height, and measurements of angle for gait analysis. Using this analysis the authors along with the police were able to correctly identify the perpetrator of a heinous crime.
[Complete Study]
Three-dimensional morphometric measurements of reef corals using underwater photogrammetry techniques
Coral Reefs, Springer-Verlag, Issue: Volume 20, Number 3
By J. Bythell, Department of Marine Sciences and Coastal Management, University of Newcastle, P. Pan, Department of Maritime Studies and International Transport, University College of Wales at Cardiff, and J. Lee, Virtually Unlimited, Kingskerswell, UK
The authors describe a novel technical approach to accurately measure surface area and other morphological characteristics of corals and similar irregular objects from underwater photography. A standard Nikonos camera system was used with a slide-scanner to produce multiple overlapping images of the object. PhotoModeler software was used to process the images and build a 3-D model of the object, which was subsequently analyzed using 3-D computer-aided design (CAD) packages.
[Complete Study]
Analysis of Bell Vibrations
By H. Spiess, B. Lau, P. Wriggers, Institute of Mechanics and Computational Mechanics, University of Hannover, A. Schneider, R. Bader, Institute of Musicology, University of Hamburg, and M. Wiggenhagen, Institute of Photogrammetry and GeoInformation, University of Hannover
The finite-element-analysis FEA of bell vibrations required an accurate 3D model of the bell under study. This modeling was done with PhotoModeler Pro and targets.
[Complete study] - 893KB pdf
Photogrammertry for the Preparation of Archaeological Excavation. 3D Restitution According to Modern & Archive Images of Beaufort Castle Landscape (Lebanon)
CIPA Special Session - Low Cost Systems in Recording and Managing the Cultural Heritage
By P. Grussenmeyer, National Institute of Applied Sciences, Strasbourg, France and J. Yasmine, Republic of Lebanon, Ministry of Culture, Directorate General of Antiquities
This paper presents the contribution of photogrammetry within the framework of the documentation of the Beaufort castle (South Lebanon), also called Qalaat el-Chaqif (12-17th century). The Lebanese government asked for a consulting firm (J. Yasmine, DGA consultant) to establish general tender documents for the restoration of the Beaufort castle. Many parts of the site were destroyed or buried because of the war. PhotoModeler was used to restitute both modern photography and photographs from archives.
[Complete study] - 1.8MB pdf
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