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Pixelwise calibration method for a telecentric structured light system.

Yuchen Yang, Song Zhang

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    Summary
    This summary is machine-generated.

    This study presents a new pixelwise calibration method for structured light systems with telecentric lenses. The approach achieves high accuracy by mapping pixel data to 3D coordinates using a white surface target.

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    Area of Science:

    • Computer Vision
    • Metrology
    • Optical Engineering

    Background:

    • Structured light systems are crucial for 3D reconstruction.
    • Telecentric lenses offer advantages in distortion-free imaging but require precise calibration.
    • Existing calibration methods may not fully address the complexities of telecentric lens systems.

    Purpose of the Study:

    • To introduce a novel pixelwise calibration method for structured light systems incorporating a telecentric lens.
    • To enhance the accuracy and robustness of 3D reconstruction in such systems.
    • To provide a detailed methodology for achieving precise camera and projector calibration.

    Main Methods:

    • A pixelwise calibration approach was developed using a camera with a telecentric lens.
    • Calibration involved using a white flat surface and a dot-patterned surface as targets.
    • The method derives projector properties via conventional camera calibration and estimates camera attributes through iterative 3D feature point optimization.
    • A virtual ideal plane fitting to 3D reconstructions generated a pixelwise phase-to-coordinate mapping, refined using various target poses.

    Main Results:

    • The proposed pixelwise calibration method was successfully implemented.
    • High calibration accuracy was demonstrated for the structured light system.
    • The method effectively maps pixel data to precise 3D coordinates, even with a telecentric lens.

    Conclusions:

    • The developed pixelwise calibration method provides a significant improvement in accuracy for structured light systems with telecentric lenses.
    • The technique offers a robust solution for precise 3D reconstruction.
    • This approach contributes to advancing metrology and computer vision applications requiring high-fidelity 3D data.