NDLI: Automated Simultaneous Calibration of a Multi-View Laser Stripe Profiler

Content Provider	IEEE Xplore Digital Library
Author	Stocher, W. Biegelbauer, G.
Copyright Year	2005
Description	Author affiliation: Profactor Produktforschungs GmbH Steyr, Austria wolfgang.stoecher@profactor.at (Stocher, W.)
Abstract	We present enhancements of existing calibration methods that allow the automated calibration of a laser stripe profiler in an industrial environment. The first and most important enhancement is a new design of the calibration object. Basically it is a “wire-frame model” of a cube, where the edges are simply standard aluminium profiles. This allows establishing point correspondences in a simple and robust way without the need of intensity information. Furthermore this hollow kind of a calibration object allows simultaneous multi-view calibration since enough points of six different planes can be seen from many directions. Given a rough calibration (based on rough measurements with ± 50% accuracy) the scanned points can be automatically allocated to the respective planes of the calibration object. Secondly we propose a new way of solving the linear model of a laser stripe profiler. By firstly solving the camera-independent geometry these values can be averaged over the multiple views, which further reduces the local offsets of point clouds and therefore enhances the output of subsequent operations like mesh generation on the combined calibrated point cloud. The paper describes the design of the calibration object and the calibration method in detail and presents experimental results on simulated and real range data sets. The industrial applicability has been demonstrated in a sensor cell with four cameras under real-world conditions including moderate oscillations of the calibration object.
Starting Page	4424
Ending Page	4429
File Size	317226
Page Count	6
File Format	PDF
ISBN	078038914X
DOI	10.1109/ROBOT.2005.1570801
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-18
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Laser modes Clouds Cameras Laser theory Laser noise Lenses Nonlinear distortion Optical sensors Automation multi-view laser stripe profiler projective calibration
Content Type	Text
Resource Type	Article

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