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The paper presents a flexible approach for the geometric calibration of a 2D infrared laser scanning range finder. It does not require\udspatial object data, thus avoiding the time-consuming determination of reference distances or coordinates with superior accuracy.\udThe core contribution is the development of an integrated bundle adjustment, based on the flexible principle of a self-calibration. This\udmethod facilitates the precise definition of the geometry of the scanning device, including the estimation of range-measurement-specific\udcorrection parameters. The integrated calibration routine jointly adjusts distance and angular data from the laser scanning range finder\udas well as image data from a supporting DSLR camera, and automatically estimates optimum observation weights. The validation\udprocess carried out using a Hokuyo UTM-30LX-EW confirms the correctness of the proposed functional and stochastic contexts and\udallows detailed accuracy analyses. The level of accuracy of the observations is computed by variance component estimation. For the\udHokuyo scanner, we obtained 0.2% of the measured distance in range measurement and 0.2 deg for the angle precision. The RMS\uderror of a 3D coordinate after the calibration becomes 5 mm in lateral and 9 mm in depth direction. Particular challenges have arisen\uddue to a very large elliptical laser beam cross-section of the scanning device used

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

An Integrated Flexible Self-calibration Approach for 2D Laser Scanning Range Finders Applied to the Hokuyo UTM-30LX-EW