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Variance lower bound on fluorescence microscopy image denoising

Yilun Li, Sheng Liu, Fang Huang
doi: https://doi.org/10.1101/2020.05.13.094748
Yilun Li
1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
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Sheng Liu
1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
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Fang Huang
1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
2Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, USA
3Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, IN, USA
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  • For correspondence: fanghuang@purdue.edu
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Abstract

The signal to noise ratio of high-speed fluorescence microscopy is heavily influenced by photon counting noise and sensor noise due to the expected low photon budget. Denoising algorithms are developed to decrease these noise fluctuations in the microscopy data. One question arises: whether there exists a theoretical precision limit for the performance of a denoising algorithm. In this paper, combining Cramér-Rao Lower Bound with constraints and the low-pass-filter property of microscope systems, we develop a method providing a theoretical variance lower bound of microscopy image denoising. We show that this lower bound is influenced by photon count, readout noise, detection wavelength, effective pixel size and the numerical aperture of the microscope system. We demonstrate our development by comparing multiple state-of-the-art denoising algorithms to this bound. This theoretical bound provides a reference benchmark for microscopy denoising algorithms, and establishes a framework to incorporate additional prior knowledge into theoretical denoising performance limit calculation.

Competing Interest Statement

The authors have declared no competing interest.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted May 15, 2020.
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Variance lower bound on fluorescence microscopy image denoising
Yilun Li, Sheng Liu, Fang Huang
bioRxiv 2020.05.13.094748; doi: https://doi.org/10.1101/2020.05.13.094748
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Variance lower bound on fluorescence microscopy image denoising
Yilun Li, Sheng Liu, Fang Huang
bioRxiv 2020.05.13.094748; doi: https://doi.org/10.1101/2020.05.13.094748

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