Programmable liquid crystal display based noise reduced dynamic synthetic coded aperture imaging camera (NoRDS-CAIC)

Area of Science:

• Optics and Imaging Technologies
• Computational Imaging
• Photonics

Background:

• Traditional lens-based imaging is limited in certain applications.
• Existing coded aperture imaging (CAI) methods often struggle to simultaneously improve signal-to-noise ratio (SNR) and spatial resolution.
• Current dynamic CAI systems require expensive equipment and complex setups.

Purpose of the Study:

• To develop a cost-effective and simple lensless imaging system.
• To enhance both spatial resolution and SNR in reconstructed images.
• To introduce the noise reduced dynamic synthetic coded aperture imaging camera (NoRDS-CAIC).

Main Methods:

• Designed a novel noise reduced dynamic synthetic coded aperture imaging camera (NoRDS-CAIC).
• Integrated a programmable liquid crystal display (LCD) and an image recorder within a compact 3D-printed shell.
• Employed a software-controlled workflow for automated coding mask display, coded image capture, and target image reconstruction using a specialized decoding algorithm.

Main Results:

• The NoRDS-CAIC achieved a high spatial resolution of 99.2 µm.
• Attained a high signal-to-noise ratio (SNR) of 19.43 dB.
• Demonstrated superior noise suppression and reconstruction resolution compared to classical CAI algorithms.

Conclusions:

• The developed NoRDS-CAIC offers a practical solution for lensless imaging.
• The system provides enhanced image quality using cost-effective components and a simple design.
• The NoRDS-CAIC shows potential for various practical imaging applications.