3D LIDAR-camera intrinsic and extrinsic calibration: Identifiability and analytical least-squares-based initialization

Faraz M. Mirzaei, Dimitrios G. Kottas, Stergios I. Roumeliotis

Research output: Contribution to journalArticle

82 Scopus citations

Abstract

In this paper we address the problem of estimating the intrinsic parameters of a 3D LIDAR while at the same time computing its extrinsic calibration with respect to a rigidly connected camera. Existing approaches to solve this nonlinear estimation problem are based on iterative minimization of nonlinear cost functions. In such cases, the accuracy of the resulting solution hinges on the availability of a precise initial estimate, which is often not available. In order to address this issue, we divide the problem into two least-squares sub-problems, and analytically solve each one to determine a precise initial estimate for the unknown parameters. We further increase the accuracy of these initial estimates by iteratively minimizing a batch nonlinear least-squares cost function. In addition, we provide the minimal identifiability conditions, under which it is possible to accurately estimate the unknown parameters. Experimental results consisting of photorealistic 3D reconstruction of indoor and outdoor scenes, as well as standard metrics of the calibration errors, are used to assess the validity of our approach.

Original languageEnglish (US)
Pages (from-to)452-467
Number of pages16
JournalInternational Journal of Robotics Research
Volume31
Issue number4
DOIs
StatePublished - Apr 1 2012

Keywords

  • Sensing and perception
  • calibration and identification
  • computer vision
  • range sensing

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