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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