Adapted Fringe Projection Sequences for Changing Illumination Conditions on the Example of Measuring a Wrought-Hot Object Influenced by Forced Cooling
Abstract
:1. Introduction
2. Materials and Methods
2.1. Temporal Phase-Unwrapping
2.2. Reconstruction Quality Metric
2.3. Compensation Method for the Light Deflection Effect Occurring in the Optical Geometry Measurements of Hot Objects
2.4. Simulation Model
2.5. 3D Measurement Setup
3. Influence of the Forced Air Flow on Phase-Shift Measurements
3.1. Theoretical Considerations
3.2. Discussion and Conclusions from the Observations
- reduce the influence of on the phase reconstruction, or
- compensate for the intensity gradient through an estimation.
3.3. Results from the Simulation Model and Discussion
4. Experiments
4.1. Experimental Setup
4.2. Sequence Analysis and New Adapted Projection Sequence
4.3. Experimental Results
4.3.1. Synthetic Intensity Gradient
4.3.2. Intensity Estimation Evaluation
4.3.3. Phase Variance Evaluation
4.3.4. Reconstruction Quality Estimation
5. Discussion
5.1. On the Results of the Synthetic Gradient Experiment
5.2. On the Results of the Approximation Quality Evaluation
5.3. On the Results of the Phase Reconstruction Quality
5.4. On the Results of the Quality Estimation of the Geometry Reconstruction
6. Summary
7. Conclusions
8. Future Work
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
References
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Image Index i | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|---|
frequency exponent k | 0 | 0 | 1 | 1 | 2 | 2 | 2 | 2 |
phase shift | 0 | 0 | 0 | |||||
phase shift | 0 | 0 | 0 |
Image Index i | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
8-image | frequency exponent k | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 |
phase shift | 0 | 0 | 0 | 0 |
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Quentin, L.; Beermann, R.; Reinke, C.; Kern, P.; Kästner, M.; Reithmeier, E. Adapted Fringe Projection Sequences for Changing Illumination Conditions on the Example of Measuring a Wrought-Hot Object Influenced by Forced Cooling. Sensors 2021, 21, 1599. https://doi.org/10.3390/s21051599
Quentin L, Beermann R, Reinke C, Kern P, Kästner M, Reithmeier E. Adapted Fringe Projection Sequences for Changing Illumination Conditions on the Example of Measuring a Wrought-Hot Object Influenced by Forced Cooling. Sensors. 2021; 21(5):1599. https://doi.org/10.3390/s21051599
Chicago/Turabian StyleQuentin, Lorenz, Rüdiger Beermann, Carl Reinke, Pascal Kern, Markus Kästner, and Eduard Reithmeier. 2021. "Adapted Fringe Projection Sequences for Changing Illumination Conditions on the Example of Measuring a Wrought-Hot Object Influenced by Forced Cooling" Sensors 21, no. 5: 1599. https://doi.org/10.3390/s21051599