Non-invasive color imaging through scattering medium under broadband illumination

TL;DR

This paper introduces a novel method for non-invasive color imaging through scattering media under broadband illumination, achieving stable, fast, and high-speed imaging suitable for natural light conditions.

Contribution

The proposed approach constructs the optical transfer function using multiple speckle frames within the memory effect range, improving stability and speed over existing methods.

Findings

Provides stable imaging results under broadband illumination.

Faster convergence compared to deep learning and phase retrieval methods.

Applicable to high-speed scattering imaging with natural light.

Abstract

Due to the complex of mixed spectral point spread function within memory effect range, it is unreliable and slow to use speckle correlation technology for non-invasive imaging through scattering medium under broadband illumination. The contrast of the speckles will drastically drop as the light source's spectrum width increases. Here, we propose a method for producing the optical transfer function with several speckle frames within memory effect range to image under broadband illumination. The method can be applied to image amplitude and color objects under white LED illumination. Compared to other approaches of imaging under broadband illumination, such as deep learning and modified phase retrieval, our method can provide more stable results with faster convergence speed, which can be applied in high speed scattering imaging under natural light illumination.