The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XL-1/W5
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W5, 521–527, 2015
https://doi.org/10.5194/isprsarchives-XL-1-W5-521-2015
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W5, 521–527, 2015
https://doi.org/10.5194/isprsarchives-XL-1-W5-521-2015

  11 Dec 2015

11 Dec 2015

INTRODUCING NOVEL GENERATION OF HIGH ACCURACY CAMERA OPTICAL-TESTING AND CALIBRATION TEST-STANDS FEASIBLE FOR SERIES PRODUCTION OF CAMERAS

M. Nekouei Shahraki and N. Haala M. Nekouei Shahraki and N. Haala
  • Institute for Photogrammetry (ifp), University of Stuttgart, Geschwister-Scholl-Str. 24D, 70174 Stuttgart, Germany

Keywords: Fisheye Camera Calibration, Single-Shot Camera Calibration, Calibration Test-Stands, Automated Calibration, Test-Stand Design, Camera Alignment-Testing, Camera Optical-Testing

Abstract. The recent advances in the field of computer-vision have opened the doors of many opportunities for taking advantage of these techniques and technologies in many fields and applications. Having a high demand for these systems in today and future vehicles implies a high production volume of video cameras. The above criterions imply that it is critical to design test systems which deliver fast and accurate calibration and optical-testing capabilities. In this paper we introduce new generation of test-stands delivering high calibration quality in single-shot calibration of fisheye surround-view cameras. This incorporates important geometric features from bundle-block calibration, delivers very high (sub-pixel) calibration accuracy, makes possible a very fast calibration procedure (few seconds), and realizes autonomous calibration via machines. We have used the geometrical shape of a Spherical Helix (Type: 3D Spherical Spiral) with special geometrical characteristics, having a uniform radius which corresponds to the uniform motion. This geometrical feature was mechanically realized using three dimensional truncated icosahedrons which practically allow the implementation of a spherical helix on multiple surfaces. Furthermore the test-stand enables us to perform many other important optical tests such as stray-light testing, enabling us to evaluate the certain qualities of the camera optical module.