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    Calibration and orientation of industrial online photogrammetry systems in situ (English)

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    In: The Journal of Engineering ; 2019 , 23 ; 9137-9142  ; 2019
    • ISSN:
      2051-3305
    • Article (Journal)  /  Electronic Resource

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    This study proposes an analytical method for calibrating and orienting online photogrammetric systems using a scale bar. The primary idea is building control lengths in the measurement volume by moving and rotating the scale bar and then conducting a self-calibration bundle adjustment using images of the control lengths. In this study, the five-point relative orientation method is used to provide estimations of the exterior camera parameters. Additionally, this study elaborates the model of the lengths constrained self-calibration bundle adjustment, the block computation algorithm and the accuracy assessment. This method obtains both the interior and the exterior orientation parameters of the two cameras, and provides spatial bar length reconstruction precision as the performance evaluation. Simulations are conducted to analyze the calibration accuracy and the results show that the method achieves comparable accuracy and precision against the state-of-the-art method. However, the method does not need steady and well distributed 3D points and is easy to operate. Real data experimental results show that the maximum length measurement error of this method in a volume of 5 m × 4 m × 2 m is <0.4 mm.

    Table of contents – Volume 2019, Issue 23

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    The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

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    8995
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    Design and analysis of gas temperature measurement module in motor vehicle exhaust online measurement system
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    9133
    State of charge prediction for UAVs based on support vector machine
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    9137
    Calibration and orientation of industrial online photogrammetry systems in situ
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    9143
    Paralleling voltage oscillation forecast method of energy device based on hysteresis curve equation
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    New method of bearing fault diagnosis based on mmemd and DE_ELM
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    9157
    Effects of depth of field on eye movement
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    Signal timing model of urban intersection based on double restraint gravitational model
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    Finite element analysis of single pair gear tooth root crack
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    9178
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    9183
    Simulation study on direct-drive wind power system
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    9190
    Experimental research on coil turns to double coil multi‐parameter impedance sensor
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