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Close Range Digital Photogrammetry

Close Range Digital Photogrammetry. Curtis Holub March 15, 2006. Outline. Definition and Uses (2) General procedure (1) PhotoModeler Software (3) Accuracy (1) Conclusions (1) Producers and References (1). Definition. Photogrammetry:

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Close Range Digital Photogrammetry

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  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. Referencing and 3D Mapping Bundle Adjustment 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 • 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 Source: Geodetic Systems, Inc

  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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