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Calibration method for monocular laser speckle projection system.

Yueqiang Zhang, Yi Zhang, Baoqiong Wang

    Optics Express
    |November 29, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an efficient calibration method for monocular laser speckle projection systems. The novel approach enhances depth estimation accuracy, enabling stereo vision capabilities without complex equipment.

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    Area of Science:

    • Computer Vision
    • Optical Engineering
    • Robotics

    Background:

    • Monocular laser speckle projection systems are crucial for 3D reconstruction.
    • Accurate calibration is essential for reliable depth estimation.
    • Existing methods often require complex setups or reference objects.

    Purpose of the Study:

    • To develop a novel, efficient, and convenient calibration method for monocular laser speckle projection systems.
    • To enable the system to function as a binocular stereo vision system.
    • To improve depth estimation accuracy compared to traditional approaches.

    Main Methods:

    • Capturing images of a calibration board with speckles under varying poses.
    • Fitting the projector's optical axis to calibrate camera-projector rotation.
    • Solving for translation in closed form and recovering the projector's virtual image via homography.

    Main Results:

    • The proposed method successfully calibrates the camera-projector system.
    • The calibrated system operates effectively as a binocular stereo vision system.
    • Experimental validation shows significant improvement in depth estimation accuracy on Astra-s and Astra-pro devices.

    Conclusions:

    • The novel calibration method is efficient and convenient, requiring no reference images or high-precision equipment.
    • This technique enhances the performance of monocular laser speckle projection systems for 3D applications.
    • The approach offers a practical solution for improved depth estimation in stereo vision setups.