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Close Range Digital Photogrammetry

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Close Range Digital Photogrammetry Curtis Holub March 15, 2006 Outline Definition and Uses (2) General procedure (1) PhotoModeler Software (3) Accuracy (1 ... – PowerPoint PPT presentation

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Title: Close Range Digital Photogrammetry


1
Close Range Digital Photogrammetry
  • Curtis Holub
  • March 15, 2006

2
Outline
  • Definition and Uses (2)
  • General procedure (1)
  • PhotoModeler Software (3)
  • Accuracy (1)
  • Conclusions (1)
  • Producers and References (1)

3
Definition
  • Photogrammetry
  • a measuring technique allowing the modelling of
    a 3D space using 2D images

Source Geodetic Systems, Inc
4
Subdivisions and Use
  • Photogrammetry
  • Aerial
  • Terrestrial
  • Close range
  • Digital
  • Applications
  • manufacturing processes
  • architectural modeling
  • equipment design and installation
  • construction
  • entertainment and special effects
  • forensics

Source North Carolina DOT
5
General Procedure
Camera Calibration and Orientation
Source Geodetic Systems, Inc
6
Referencing
Source Photomodeler
7
3D Output
Source Photomodeler
8
Automation
Source Photomodeler
9
Accuracy
Source Geodetic Systems, Inc
  • Current capabilities
  • 1/10 to 1/50 of pixel
  • 1/20,000 to 1/100,000 of object
  • 0.009 to 0.002 on a 15 ft object

10
Conclusions
  • Many potential applications exist
  • Accuracy levels are impressive and continue to
    improve
  • For a single measurements the method is simple
    and quick
  • Post-processing demands increase for multiple
    measurements
  • Industry trend is towards improved automation

11
Producers and References
  • Producers
  • EOS Systems Inc. http//www.photomodeler.com/
  • Geodetic Services Inc. http//www.geodetic.com/
  • Vexcel http//www.vexcel.com/
  • Shape Quest Inc. http//www.shapecapture.com/
  • Other References
  • Elements of Photogrammetry
  • Authors M. Kasser and Y. Egels
  • Digital Photogrammetry
  • Authors P. Wolf and B. Dewitt
  • Jun Ji
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