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Pixel-wise rational model for a structured light system
Optics Letters
|May 15, 2023
Summary
This study introduces a new structured light system model that corrects for lens distortion using pixel-specific functions. The novel approach ensures high measurement accuracy, proving robust both inside and outside the calibration area.
Area of Science:
- Optics and Photonics
- Computer Vision
- Metrology
Background:
- Structured light systems are widely used for 3D measurements.
- Lens distortion is a common challenge that can degrade accuracy.
- Existing models often struggle with local or complex distortion patterns.
Purpose of the Study:
- To develop a novel structured light system model.
- To accurately compensate for local lens distortion at a pixel level.
- To improve measurement accuracy and robustness in 3D reconstruction.
Main Methods:
- Proposed a pixel-wise rational function model for lens distortion.
- Utilized a stereo vision method for initial system calibration.
- Estimated and applied the rational model for each pixel individually.
Main Results:
- Achieved high measurement accuracy within the calibration volume.
- Demonstrated robust accuracy even outside the defined calibration space.
- The pixel-wise approach effectively handled local lens distortions.
Conclusions:
- The novel structured light model offers superior accuracy and robustness.
- Pixel-wise correction of lens distortion is effective for 3D metrology.
- This method advances the capabilities of structured light 3D scanning systems.
