Simple Field-of-View Calibration Procedure for High Fidelity Photogrammetry
Technical Report,01 Jun 2016,31 Dec 2017
CCDC AC, METC, FCDD-ACM-AA Picatinny Arsenal United States
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This report introduces a simple and straightforward field-of-view calibration procedure for fixed-view cameras to be used for U.S. Army weapons testing. This method will significantly improve the accuracy of photogrammetric measurements for both two-dimensional and three-dimensional 3D applications by correcting for image skew and large-scale, non-spherical image distortions. The process makes use of a sub-pixel reference point selection technique in camera images, and precision surveyed points in 3D, allowing a more accurate affine transform to be generated between image coordinates and their projection onto a calibration plane in 3D coordinates. Although not necessary, the process can be made even more accurate by first conducting a conventional cameralens calibration procedure to account for spherical aberrations. Given the simplicity of this approach and the advantages it provides, it is recommended to use this procedure at all U.S. Army tests where high-fidelity measurements are required from video collected with fixed-view cameras systems.
- Cartography and Aerial Photography
- Test Facilities, Equipment and Methods