arXiv:2510.12425math.OCcs.CV2025-10

用新框架提升张量补全效果,尤其在低采样率下表现更优。

Tensor Completion via Monotone Inclusion: Generalized Low-Rank Priors Meet Deep Denoisers

  • 基于单调包含理论,放宽对深度去噪器的限制。
  • 在低采样率下,多维图像补全的MPSNR领先第二名0.717dB。
  • 适合需要高精度张量补全的科研与工程场景。

多维数据中的缺失条目在诸多实际应用中给下游分析带来挑战。这些数据天然以张量形式表示,近期结合全局低秩先验与即插即用去噪器的方法展现出优异的实证性能。然而,现有方法常依赖经验收敛性或不切实际的假设,如深度去噪器等价于隐式正则化的近端算子,这通常不成立。为此,我们提出一种基于单调包含范式的新型张量补全框架。在此框架中,深度去噪器被视作一般算子,相较于经典优化方法具有更少约束。为更好捕捉整体结构,进一步引入弱凸惩罚的广义低秩先验。基于Davis-Yin分裂方案,我们开发了GTCTV DPC算法,并严格证明其全局收敛性。大量实验表明,该方法在定量指标和视觉质量上均持续优于现有方法,尤其在低采样率下表现突出。例如,在多维图像补全中采样率为0.05时,平均MPSNR比次优方法高出0.717 dB;在多光谱图像和彩色视频上分别提升0.649 dB。

原文摘要 · Abstract (English)

Missing entries in multi dimensional data pose significant challenges for downstream analysis across diverse real world applications. These data are naturally represented as tensors, and recent completion methods integrating global low rank priors with plug and play denoisers have demonstrated strong empirical performance. However, these approaches often rely on empirical convergence alone or unrealistic assumptions, such as deep denoisers acting as proximal operators of implicit regularizers, which generally does not hold. To address these limitations, we propose a novel tensor completion framework grounded in the monotone inclusion paradigm. Within this framework, deep denoisers are treated as general operators that require far fewer restrictions than in classical optimization based formulations. To better capture holistic structure, we further incorporate generalized low rank priors with weakly convex penalties. Building upon the Davis Yin splitting scheme, we develop the GTCTV DPC algorithm and rigorously establish its global convergence. Extensive experiments demonstrate that GTCTV DPC consistently outperforms existing methods in both quantitative metrics and visual quality, particularly at low sampling rates. For instance, at a sampling rate of 0.05 for multi dimensional image completion, GTCTV DPC achieves an average mean peak signal to noise ratio (MPSNR) that surpasses the second best method by 0.717 dB, and 0.649 dB for multi spectral images, and color videos, respectively.

张量补全深度去噪低秩先验优化理论

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