Accuracy Articles

10 articles listed in reverse chronological order. View articles by field type using links on the right.


The Accuracy of an Optimized, Practical Close-Range Photogrammetry Method for Vehicular Modeling
04/05/2016 | Louis R. Peck, Mu-Hua Cheng
SAE Int. J. Trans. Safety 4(2):2016
Applications: Accuracy and Forensics & Accident Recon.

Three vehicles of varying size were measured using an optimized, practical photogrammetry technique and the results were
compared to measurements acquired via total station and a FaroArm. This research shows photogrammetry can be highly
accurate and efficient with proper methodology, while also expanding on the photogrammetry literature database and improving confidence in the technique.

  local copy

 



Quantifying the accuracy of dense surface modeling within PhotoModeler Scanner
09/25/2012 | Eos Systems Research
Applications: Accuracy and All

The article shows that PhotoModeler Scanner can match (if not exceed) the accuracy of a laser scanner. This article also demonstrates the optimal way to set up photogrammetry projects to maximize DSM accuracy.

  local copy

 



Assessing the Photogrammetric Potential of Cameras in Portable Devices
09/01/2012 | M. J. Smith, N. Kokkas
Applications: Accuracy and All

Many application specialists may find portable device (smartphone, tablet) cameras an attractive proposition where some modest photogrammetric capability would be useful. This paper investigates the geometric potential of these cameras for close range photogrammetric applications.

 article link  local copy

 



Digital Camera Calibration Using Images Taken from an Unmanned Aerial Vehicle
09/16/2011 | M. Pérez, F. Agüera, F. Carvajal
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXVIII-1/C22, ISPRS Zurich 2011 Workshop, 14-16 September 2011, Zurich, Switzerland
Applications: Accuracy, All, Geology & Mining, and UAS / UAV / Drone

The aim of this work is the establishment of an efficient and accurate digital camera calibration method to be used in particular working conditions, as it can be found with our UAV (Unmanned Aerial Vehicle) photogrammetric projects.

 article link  local copy

 



MONITORING THE TESTING, CONSTRUCTION AND AS-BUILT CONDITION OF MEMBRANE STRUCTURES BY CLOSE RANGE PHOTOGRAMMETRY
06/21/2010 | Chih-Heng Wang, Jon P. Mills, Peter D. Gosling, Ben Bridgens, Robert J Grisdale; School of Civil Engineering and Geosciences, Newcastle University
International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol. XXXVIII, Part 5
Applications: Accuracy, All, Engineering & Science, and Industrial Measurement

Engineering deformation monitoring requires techniques which can produce high precision and accuracy, reliable measurements at good temporal resolution and fast processing speed. Moreover, monitoring in civil engineering is generally considered to be labour-intensive and financially expensive, and it can take significant effort to arrange the necessary human resources, transportation and equipment maintenance. Such requirements are especially true for monitoring non-rigid membrane structures (defined in this paper as covers or enclosures in which a fabric surface is pre-shaped and pre-tensioned to provide a shape that is stable under environmental loads). Low cost, automated, photogrammetric techniques therefore have the potential to become routinely viable for the structural monitoring of non-rigid membrane structures in the future. This research is investigating the use of close range photogrammetry to be applied at all stages of membrane structure engineering, from materials testing, through dimensional control in construction to in-situ, as-built monitoring of the finished construct.

 article link  local copy

 



Metric Potential of a 3D Measurement System Based on Digital Compact Cameras
06/03/2009 | Enoc Sanz-Ablanedo, José Ramón Rodríguez-Pérez, Pedro Arias-Sánchez and Julia Armesto; Geomatics Engineering Research Group, University of León, and Department of Natural Resources and Environmental Engineering, University of Vigo
Applications: Accuracy, All, and Industrial Measurement

What is unique in this study is that accuracy was assessed on a system with four independent cameras and all those cameras were consumer-grade cameras with zoom lenses. This is a configuration one might use for a low-cost PMV system (for tracking object movement and shape change over time).

  local copy

 



One part in 300,000. Precision and Accuracy Discussion
04/03/2006 | Alan Walford, Eos Systems Inc.
Applications: Accuracy and All

We conducted an experiment to determine PhotoModelers 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.

  local copy

 



3D Measurement Accuracy of a Consumer-Grade Digital Camera and Retro-Reflective Survey Targets
2000 | Mike Fedak, InSpec Engineering Services, West Vancouver Canada
Applications: Accuracy, All, and Surveying

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.

  local copy

 



Accuracy Study on Photogrammetry of a 5m Inflatable Space Antenna With Consumer Digital Cameras
2000 | Richard S. Pappa, NASA Langley Research Center, Louis R. Giersch, George Washington University and Jessica M. Quagliaroli, University of Connecticut, USA
Applications: Accuracy, All, Engineering & Science, and Industrial Measurement

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.

  local copy

 



Accuracy Study Project of Eos Systems’ PhotoModeler
1995 | Dr. Klaus Hanke, University of Innsbruck, Austria
Applications: Accuracy and All

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.

  local copy

 



©Copyright 2018 PhotoModeler Technologies