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| Content Provider | IET Digital Library |
|---|---|
| Author | Sun, Peng Lu, Naiguang Dong, Mingli Wang, Jun Yan, Bixi |
| Abstract | 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. |
| Starting Page | 9137 |
| Ending Page | 9142 |
| Page Count | 6 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 23, Dec (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/23 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.9202 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2019-03-25 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | Bar Position Number Block Computation Algorithm Calibration Camera Camera Intersection Angle Exterior Camera Parameter Estimation Exterior Orientation Parameter Five-point Relative Orientation Method Image Sonsor Industrial Online Photogrammetry System Length Measurement Maximum Length Measurement Error Measurement And Error Theory Measurement Error Measurement Standard Measurement Standard And Calibration Measurement Theory Online Photogrammetric System Parameter Estimation Performance Evaluation Photogrammetry Self-calibration Bundle Adjustment Method Spatial Bar Length Reconstruction Precision Spatial Variables Measurement Standard Deviation Estimation |
| Content Type | Text |
| Resource Type | Article |
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