Airborne Digital Camera Calibration and Certification

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Presentation transcript:

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

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

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

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

TruSpectrum™ Technology Providing unparalleled Radiometric Accuracy for: Standard mapping applications requiring true color representation CIR (color infrared) remote sensing applications utilizing false-color imagery Feature Function Benefit TruSpectrum Image Chain Analysis for Color and Colour Infra Red (CIR) Imagery Individual components of the imaging process are modeled in order to understand how changes in the chain may affect image quality Seamless Mosaics for better product delivery in remote sensing and digital mapping applications

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

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

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

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

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