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    Area of Science:

    • Optics
    • Image Processing
    • Computational Imaging

    Background:

    • Single-pixel cameras traditionally capture intensity information.
    • Reconstructing images from intensity measurements can be limited in detail.
    • Complex-amplitude representation offers a more complete description of optical signals.

    Purpose of the Study:

    • To develop a single-pixel camera system capable of complex-amplitude imaging.
    • To demonstrate the system's utility for profilometry and quantitative phase imaging.
    • To leverage optical coding masks for enhanced imaging capabilities.

    Main Methods:

    • Utilizing complex-amplitude representation for input and output signals.
    • Employing optical coding masks that directly represent Hadamard patterns.
    • Implementing coherent addition via interference for signal summation.
    • Incorporating a reference beam with phase shifting using the mask's residual area.

    Main Results:

    • Successful complex-amplitude imaging of objects was achieved.
    • Profilometry using reflectance measurements was demonstrated.
    • Quantitative phase imaging using transmittance measurements was performed.
    • The system exhibited high stability against external disturbances due to its single-beam line structure.

    Conclusions:

    • Complex-amplitude representation is effective for single-pixel camera imaging.
    • The proposed system enables advanced imaging techniques like profilometry and quantitative phase imaging.
    • The use of optical coding masks enhances system performance and stability.