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Robust Fourier-Based Checkerboard Corner Detection for Camera Calibration

  • Benjamin SpitschanEmail author
  • Jörn Ostermann
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11401)

Abstract

Precise localization of reference markers is crucial for the accuracy of target-based camera calibration. State-of-the art detectors, however, are sensitive to optical blur corrupting the image in many practical calibration scenarios. We propose a novel method for the sub-pixel refinement stage of common checkerboard target detectors. It uses the symmetry of checkerboard crossings and exploits the periodicity in the angular frequency domain when the origin of a polar coordinate system is centered at the crossing. The detector estimates the crossing center’s sub-pixel position by minimizing spurious frequency components that occur increasingly at ever larger distances from the crossing center.

An average localization error of 0.08 px is achieved in noisy and artificially blurred synthetic images, surpassing the state of the art by 65 %. In addition, we evaluated the detector in real-world camera calibration using a public data set, achieving an reprojection error of 0.11 px compared to 0.27 px for the state of the art.

Keywords

Optical blur Camera calibration Checkerboard detection 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Institut für Informationsverarbeitung (TNT)Leibniz Universität HannoverHannoverGermany

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