arXiv:2604.13525stat.MLcs.LG2026-04

提出加权联合总变差的低秩张量补全方法,更好恢复带噪声和缺失数据的图像。

Robust Low-Rank Tensor Completion based on M-product with Weighted Correlated Total Variation and Sparse Regularization

论文配图:Robust Low-Rank Tensor Completion based on M-product with Weighted Correlated Total Variation and Sparse Regularization
图 1 · 摘自论文原文
  • 基于M-积框架设计加权核范数与稀疏正则化,自适应保留关键结构
  • 在图像补全、去噪和背景分离任务中均优于现有方法
  • 适合处理含异常值和稀疏噪声的高维数据重建问题

鲁棒低秩张量补全问题旨在恢复实际应用中常见缺失、异常值和稀疏噪声的高维张量数据。现有方法受限于均匀正则化策略,如张量核范数和ℓ₁范数,对所有奇异值和稀疏分量施加相同收缩,破坏关键张量结构。本文提出的张量加权相关总变差(TWCTV)正则项,在M-积框架下结合梯度张量的加权施瓦茨-p范数以保持低秩性并强化平滑性,同时通过加权稀疏分量抑制噪声。该加权机制自适应降低阈值,有效保留主导奇异值和稀疏成分,提升关键结构与细节的重建质量。通过改进的交替方向乘子法(ADMM),算法兼具计算效率与理论保障,其收敛性在M-积框架内得到系统分析。跨图像补全、去噪和背景分离的大量数值实验验证了该方法显著优于基准模型。

原文摘要 · Abstract (English)

The robust low-rank tensor completion problem addresses the challenge of recovering corrupted high-dimensional tensor data with missing entries, outliers, and sparse noise commonly found in real-world applications. Existing methodologies have encountered fundamental limitations due to their reliance on uniform regularization schemes, particularly the tensor nuclear norm and $\ell_1$ norm regularization approaches, which indiscriminately apply equal shrinkage to all singular values and sparse components, thereby compromising the preservation of critical tensor structures. The proposed tensor weighted correlated total variation (TWCTV) regularizer addresses these shortcomings through an $M$-product framework that combines a weighted Schatten-$p$ norm on gradient tensors for low-rankness with smoothness enforcement and weighted sparse components for noise suppression. The proposed weighting scheme adaptively reduces the thresholding level to preserve both dominant singular values and sparse components, thus improving the reconstruction of critical structural elements and nuanced details in the recovered signal. Through a systematic algorithmic approach, we introduce an enhanced alternating direction method of multipliers (ADMM) that offers both computational efficiency and theoretical substantiation, with convergence properties comprehensively analyzed within the $M$-product framework.Comprehensive numerical evaluations across image completion, denoising, and background subtraction tasks validate the superior performance of this approach relative to established benchmark methods.

张量补全低秩优化图像修复正则化

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