Non-confocal non-line-of-sight imaging using frequency-domain phase compensation with the reference function

Area of Science:

• Optics and Photonics
• Signal Processing
• Computational Imaging

Background:

• Non-confocal non-line-of-sight (NLOS) imaging offers high speed and energy efficiency.
• Existing NLOS imaging methods suffer from poor image quality and long reconstruction times.
• Millimeter-wave imaging techniques have shown promise in overcoming some imaging limitations.

Purpose of the Study:

• To address the limitations of current non-line-of-sight imaging techniques.
• To propose a novel frequency-domain phase compensation method for NLOS imaging.
• To enhance imaging quality and reduce reconstruction time in NLOS scenarios.

Main Methods:

• Adapted a single-input multiple-output (SIMO) frequency-domain imaging scheme from millimeter-wave to NLOS imaging.
• Developed a frequency-domain phase compensation NLOS imaging method utilizing reference functions.
• Employed Fast Fourier Transform (FFT) for efficient image reconstruction.

Main Results:

• Achieved high-resolution target reconstruction in NLOS environments.
• Demonstrated significant reduction in image artifacts and shape distortion compared to existing methods.
• Showcased reduced computational requirements due to FFT implementation.

Conclusions:

• The proposed frequency-domain phase compensation method enhances NLOS imaging performance.
• This approach offers a more accurate and computationally efficient solution for NLOS imaging.
• The method holds potential for various applications requiring high-quality NLOS reconstruction.