A fusion denoising method based on homomorphic transform and 3D transform-domain collaborative filtering for laser speckle imaging of blood flow

IF 1.2 4区物理与天体物理 Q4 OPTICS

Journal of Modern Optics Pub Date : 2022-11-11 DOI:10.1080/09500340.2022.2146224

Xuenian Fu, Sijin Wu, Juanning Si, Weixian Li

引用次数: 1

Abstract

Laser speckle contrast imaging (LSCI) is a real-time, full-field, non-contact optical imaging technique that has been widely used in blood flow imaging. However, its practical applications are limited due to its low signal-to-noise ratio (SNR) and low image contrast. In this study, a fusion denoising algorithm based on homomorphic transform and block-matching and 3D transform-domain collaborative filtering algorithm is proposed to reduce noise and improve image contrast. The reliability and applicability of the proposed method were evaluated by a phantom experiment and two in vivo experiments. The results show that the proposed algorithm can effectively remove the noise and enhance the image contrast. Consequently, the SNR is increased, the dynamic range of LSCI is expanded, and the estimation accuracy of blood flow is improved.

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基于同态变换和三维变换域协同滤波的血流激光散斑图像融合去噪方法

激光散斑对比成像（LSCI）是一种实时、全视场、非接触的光学成像技术，在血流成像中得到了广泛的应用。然而，由于其低信噪比和低图像对比度，其实际应用受到限制。为了降低噪声，提高图像对比度，本文提出了一种基于同态变换和块匹配的融合去噪算法和三维变换域协同滤波算法。通过一个体模实验和两个体内实验评估了所提出方法的可靠性和适用性。结果表明，该算法能够有效地去除噪声，提高图像对比度。因此，SNR增加，LSCI的动态范围扩大，并且血流的估计精度提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Modern Optics 物理-光学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

2.6 months

期刊介绍： The journal (under its former title Optica Acta) was founded in 1953 - some years before the advent of the laser - as an international journal of optics. Since then optical research has changed greatly; fresh areas of inquiry have been explored, different techniques have been employed and the range of application has greatly increased. The journal has continued to reflect these advances as part of its steadily widening scope. Journal of Modern Optics aims to publish original and timely contributions to optical knowledge from educational institutions, government establishments and industrial R&D groups world-wide. The whole field of classical and quantum optics is covered. Papers may deal with the applications of fundamentals of modern optics, considering both experimental and theoretical aspects of contemporary research. In addition to regular papers, there are topical and tutorial reviews, and special issues on highlighted areas. All manuscript submissions are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. General topics covered include: • Optical and photonic materials (inc. metamaterials) • Plasmonics and nanophotonics • Quantum optics (inc. quantum information) • Optical instrumentation and technology (inc. detectors, metrology, sensors, lasers) • Coherence, propagation, polarization and manipulation (classical optics) • Scattering and holography (diffractive optics) • Optical fibres and optical communications (inc. integrated optics, amplifiers) • Vision science and applications • Medical and biomedical optics • Nonlinear and ultrafast optics (inc. harmonic generation, multiphoton spectroscopy) • Imaging and Image processing