提出零样本荧光显微图像去噪方法,解决真实噪声建模与高效推理难题。
FM2S: Towards Spatially-Correlated Noise Modeling in Zero-Shot Fluorescence Microscopy Image Denoising
- 通过自适应混合泊松-高斯噪声注入,保留真实噪声的空间相关性。
- 两阶段渐进学习提升结构与高频细节重建,实现平均1.4dB PSNR提升。
- 仅3.5千参数,训练推理速度比当前最优快270倍,适合实际设备部署。
荧光显微图像去噪面临双重挑战:真实噪声为强空间相关的泊松-高斯混合噪声,且动态生物场景下难以获取成对的含噪/干净图像。现有监督方法依赖合成噪声(如高斯/泊松),泛化能力差;自监督方法因噪声假设过于简单或网络过重,在真实噪声下性能下降。本文提出零样本去噪器FM2S,通过三项创新实现高效去噪:1)噪声注入模块,自适应合成泊松-高斯噪声,保持真实图像的空间相关性与全局统计特性;2)两阶段渐进学习策略,先恢复结构先验,再通过噪声分布对齐优化高频细节;3)超轻量网络(仅3.5k参数),训练与推理速度比当前最优模型快270倍。在多个FMI数据集上的实验表明,FM2S平均比CVF-SID高1.4dB PSNR,参数量仅为AP-BSN的0.1%。尤其在不同噪声水平下表现稳定,适用于多种传感器配置的显微平台。代码与数据集将公开。
原文摘要 · Abstract (English)
Fluorescence microscopy image (FMI) denoising faces critical challenges due to the compound mixed Poisson-Gaussian noise with strong spatial correlation and the impracticality of acquiring paired noisy/clean data in dynamic biomedical scenarios. While supervised methods trained on synthetic noise (e.g., Gaussian/Poisson) suffer from out-of-distribution generalization issues, existing self-supervised approaches degrade under real FMI noise due to oversimplified noise assumptions and computationally intensive deep architectures. In this paper, we propose Fluorescence Micrograph to Self (FM2S), a zero-shot denoiser that achieves efficient FMI denoising through three key innovations: 1) A noise injection module that ensures training data sufficiency through adaptive Poisson-Gaussian synthesis while preserving spatial correlation and global statistics of FMI noise for robust model generalization; 2) A two-stage progressive learning strategy that first recovers structural priors via pre-denoised targets then refines high-frequency details through noise distribution alignment; 3) An ultra-lightweight network (3.5k parameters) enabling rapid convergence with 270$\times$ faster training and inference than SOTAs. Extensive experiments across FMI datasets demonstrate FM2S's superiority: It outperforms CVF-SID by 1.4dB PSNR on average while requiring 0.1% parameters of AP-BSN. Notably, FM2S maintains stable performance across varying noise levels, proving its practicality for microscopy platforms with diverse sensor characteristics. Code and datasets will be released.
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