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Airborne Digital Camera Calibration and Certification

Learn about the calibration and certification processes for airborne digital cameras, presented by Eric Liberty. This presentation covers topics such as digital sensor systems, camera mechanics, optics, lens distortion, and more. Discover how stable camera metric stability is achieved and the benefits of mapping grade cameras. The use of tie-points and ground control in the self-calibration method is discussed, along with the importance of camera test labs and manufacturing facilities. Additionally, terrestrial camera calibration and the TruSpectrum™ technology for radiometric accuracy are covered. The DSS workflow for airborne calibration and QC is highlighted, with a focus on the CalQC software. Join us to improve the quality and efficiency of camera calibration and maintenance.

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Airborne Digital Camera Calibration and Certification

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  1. ASPRS Ottawa Airborne Digital Camera Calibration and Certification presented by Eric Liberty

  2. Digital Sensor System (DSS) 422/439 • Electronics • Digital Back, CCD • Mechanics • Camera Body, Shutter • Optics • Customized Lens, filters, Stable Mount

  3. Camera Metric Stability? Metric implies that the system is calibrated for interior orientation and remains STABLE over time • Principle Point • Lens Distortion • Focal Length + Shock & Vibe and Pressure Tested= Mapping Grade Camera VS Self Calibration method using AT to determine interior orientation using tie-points and Ground Control

  4. Camera test labs and manufacturing facilities Applanix Camera Manufacturing Lab Precision CNC Machine • Reasons: • Improve overall quality and re-duce re-work time via improved tooling • Shorten manufacturing time via improved tooling • Shorten turn-around times on re-calibrations for the yearly maintenance Terrestrial Camera Calibration Cage

  5. TruSpectrum™ Technology • Providing unparalleled Radiometric Accuracy for: • Standard mapping applications requiring true color representation • CIR (color infrared) remote sensing applications utilizing false-color imagery

  6. Adjusting the digital back Determine tilt with optical microscope Digital Back Adapter is machined to correct

  7. Focus Adjustment using a collimator for … - system focus adjustment - determination of focus gradient

  8. DSS Terrestrial Calibration • Applanix Proprietary Software • Calibration Parameters • Focal Length • Radial and Tangential Distortion • Principal Point Location • Initial Boresight Alignment

  9. DSS Workflow: Airborne Calibration and QC • CalQC is KEY: Boresight Calibration, QA/QC CalQC is RIGOROUS and the BEST COMMERCIAL BORESIGHT CALIBRATION SOFTWARE!

  10. All DSS specs are qualified by USGS Certification Currently working towards certifying system within international mapping authorities

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