Abstract—This paper describes a method for the automatic self-calibration of a 3D Laser sensor. We wish to acquire crisp point clouds and so we adopt a measure of crispness to capture point cloud quality. We then pose the calibration problem as the task of maximising point cloud quality. Concretely, we use Rényi Quadratic Entropy to measure the degree of organisation of a point cloud. By expressing this quantity as a function of key unknown system parameters, we are able to deduce a full calibration of the sensor via an online optimisation. Beyond details on the sensor design itself, we fully describe the end-to-end intrinsic parameter calibration process and the estimation of the clock skews between the constituent microprocessors. We analyse performance using real and simulated data and demonstrate robust performance over thirty test sites.

calib_sheehan

  • [PDF] M. Sheehan, A. Harrison, and P. Newman, “Self-calibration for a 3D laser,” The International Journal of Robotics Research, 2012.
    [Bibtex]

    @article{SheehanCalibration2012,
    Abstract = {In this paper we describe a method for the automatic self-calibration
    of a 3D laser sensor. We wish to acquire crisp point clouds and so
    we adopt a measure of crispness to capture point cloud quality. We
    then pose the calibration problem as the task of maximizing point
    cloud quality. Concretely, we use Rnyi Quadratic Entropy to measure
    the degree of organization of a point cloud. By expressing this quantity
    as a function of key unknown system parameters, we are able to deduce
    a full calibration of the sensor via an online optimization. Beyond
    details on the sensor design itself, we fully describe the end-to-end
    intrinsic parameter calibration process and the estimation of the
    clock skews between the constituent microprocessors. We analyse performance
    using real and simulated data and demonstrate robust performance
    over 30 test sites.},
    Author = {Mark Sheehan and Alastair Harrison and Paul Newman},
    Journal = {The International Journal of Robotics Research},
    Keywords = {3D Laser Calibration},
    Owner = {mcs},
    Pdf = {http://www.robots.ox.ac.uk/~mobile/Papers/2012IJR_mark.pdf},
    Title = {Self-calibration for a 3D laser},
    Url = {http://ijr.sagepub.com/content/early/2011/12/21/0278364911429475},
    Year = {2012},
    Bdsk-Url-1 = {http://ijr.sagepub.com/content/early/2011/12/21/0278364911429475}}