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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
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Accurate and robust calibration method based on pattern geometric constraints for fringe projection profilometry.
Applied Optics
|February 4, 2017
Summary
This study presents a new calibration method for fringe projection profilometry. It enhances measurement accuracy and robustness by directly mapping phase to height, considering lens distortion.
Area of Science:
- Optics and Photonics
- Metrology
- Computer Vision
Background:
- Accurate phase-to-height mapping is crucial in fringe projection profilometry.
- Existing methods may suffer from reduced accuracy and robustness.
- Lens distortion can introduce significant errors in 3D measurements.
Purpose of the Study:
- To develop a novel calibration method for fringe projection profilometry.
- To enhance measurement accuracy and robustness by directly establishing phase-height relationship.
- To account for and mitigate lens distortion effects.
Main Methods:
- A calibration method based on pattern geometric constraints is proposed.
- Analysis of pattern distribution in image coordinates establishes direct phase-height mapping.
- Camera lens distortion is mathematically incorporated to prevent error propagation.
Main Results:
- The method establishes a direct one-to-one mapping between phase and height.
- Lens distortion is effectively considered and corrected for, reducing error propagation.
- Experimental evaluations confirm high accuracy and strong robustness.
Conclusions:
- The presented calibration method offers significant improvements in accuracy and robustness.
- It is practical due to relaxed system constraints and efficient calibration.
- The method demonstrates flexibility for various measurement scenarios.
