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Beyond the interference problem: hierarchical patterns for multiple-projector structured light system.

Zengqiang Yan, Li Yu, You Yang

    Applied Optics
    |June 13, 2014
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces hierarchical patterns for 3D reconstruction using structured light (SL). The method effectively separates superimposed patterns from multiple projectors, enabling accurate depth map generation for dynamic objects.

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    Area of Science:

    • Computer Vision
    • Optics
    • 3D Reconstruction

    Background:

    • Structured light (SL) is crucial for 3D object reconstruction.
    • Multiple projectors are needed for extended scene coverage in SL systems.
    • Pattern superposition in overlapping areas hinders accurate depth mapping.

    Purpose of the Study:

    • To develop a novel method for separating superimposed patterns in multi-projector SL systems.
    • To enable accurate 3D reconstruction of dynamic objects in challenging conditions.

    Main Methods:

    • Design of hierarchical patterns based on de Bruijn sequences.
    • Each pixel in binary patterns is replaced by a distinct, limited-size bin.
    • Separation of patterns by analyzing color distributions in superimposed bins.
    • Decoding separated patterns to obtain depth maps.

    Main Results:

    • The proposed hierarchical patterns can be successfully separated in a multi-projector SL system.
    • Accurate depth maps were obtained even with pattern superposition.
    • The method demonstrated robustness across various experimental scenes and conditions.

    Conclusions:

    • The developed hierarchical patterns effectively address pattern superposition in multi-projector SL.
    • This technique significantly improves the accuracy and reliability of 3D reconstruction.
    • The method shows promise for real-world applications requiring precise 3D data.