用自监督方法显著提升受乘性噪声干扰的激光聚变图像质量。
Denoising ICF Images with Multiplicative Uniform Noise: A Self-Supervised Study Based on the Log-Domain Noisier2Inverse Framework

- 在对数域构建自监督框架,通过优化损失函数实现无真实干净图像的去噪。
- 最佳方案达21.41dB PSNR和0.8358 SSIM,较原始噪声图像提升19.46dB。
- 适合缺乏干净数据的科学成像场景,尤其适用于高能物理实验图像处理。
本文针对惯性约束聚变(ICF)图像中乘性均匀噪声问题,提出并评估了一种基于对数域的自监督去噪框架——Log-Domain Noisier2Inverse。该框架在理论上证明:最小化对数域自监督损失等价于变换域中的监督学习。研究揭示了ICF图像特有的实现挑战,并在各阶段提出相应解决方案,最终报告定量结果。采用每图独立加载均匀噪声的变体B取得最佳效果:平均PSNR为21.41dB,SSIM为0.8358,相比原始噪声基线(1.95dB)提升19.46dB,显著优于BM3D对数域(4.47dB,SSIM 0.5181)和Noise2Self(4.75dB,SSIM 0.0177)。变体A使用固定高斯噪声,获21.39dB PSNR与0.8436 SSIM。三种方法中,Log-Domain Noisier2Inverse与Noise2Self全程自监督训练,无需真实干净图像;BM3D为无需训练的传统滤波方法。所有方法仅在评估时使用干净参考图像。
原文摘要 · Abstract (English)
This paper documents the implementation and evaluation of a self-supervised denoising framework on Inertial Confinement Fusion (ICF) images corrupted by Multiplicative Uniform noise: the \emph{Log-Domain Noisier2Inverse} framework. This framework is developed and analysed in this work; the key theoretical result -- that minimising the log-domain self-supervised loss is equivalent to supervised learning in the transformed domain -- is presented with full proof. We document significant implementation challenges arising from the unique characteristics of ICF imagery, describe the fixes applied at each stage, and report final quantitative results. The log-domain approach with per-image JSON Uniform noise loading (Variant~B) achieves the best result: a mean PSNR of $21.41\db$ and SSIM of $0.8358$, a $+19.46\db$ improvement over the noisy input baseline of $1.95\db$, substantially outperforming BM3D log-domain ($4.47\db$, SSIM $0.5181$) and Noise2Self ($4.75\db$, SSIM $0.0177$). Variant~A, using fixed Gaussian noise loading, achieves $21.39\db$ PSNR and SSIM $0.8436$. Of the three evaluated methods, Log-Domain Noisier2Inverse and Noise2Self are entirely self-supervised during training, requiring no clean ground truth data; BM3D is a classical filter-based method requiring no training at all. The clean reference images are used solely for quantitative evaluation of all three methods.
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