arXiv:2606.31353cs.CV2026-06

提出RCL-Mamba模型,解决旋转扫描中图像模糊与伪影问题。

RCL-Mamba: A Dual-domain State Space Model for Measurement-oriented Image Restoration in Rotational Sparse-View Scanning Computed Laminography

  • 分两阶段处理:先去投影域旋转模糊,再抑制图像域稀疏伪影
  • 仅用64视角即达512视角效果,效率提升8倍且结构保真度高
  • 适合高速无损检测场景,尤其对电路板等精密结构测量友好

旋转扫描计算机层析成像(RCL)广泛用于大型平面构件的无损检测。为实现快速检测,常采用连续稀疏视角扫描,导致曝光期间的角积分效应在投影域引发旋转模糊,而稀疏采样本身造成数据不完整,在重建图像域表现为稀疏伪影。本文提出RCL-Mamba,一种面向测量任务的双域状态空间模型(SSM)图像恢复网络。该框架采用级联联合处理策略:首先在投影域校正旋转模糊,随后在图像域抑制稀疏伪影。设计了Mamba-CNN双分支模块,自适应平衡大尺度模糊校正与局部细节恢复。在模拟数据集和真实印刷电路板(PCB)扫描数据上评估显示,RCL-Mamba在去模糊、伪影抑制和结构保持方面均优于现有基线方法。基于线轮廓的结构测量进一步验证,该方法更有效保留通孔/焊盘边界与细小走线特征。关键在于,将所需扫描视角从512降至64,使检测效率提升约8倍,同时不损失重建质量,为高通量RCL检测提供可靠、面向测量的图像恢复方案。

原文摘要 · Abstract (English)

Rotational Scanning Computed Laminography (RCL) is widely utilized for the Non-Destructive Testing(NDT) of large planar components. However, to facilitate rapid inspection, continuous sparse-view scanning is often employed, where the angular integration effect during exposure induces rotational blur in the projection domain. Furthermore, the data incompleteness inherent in sparse sampling manifests as sparse artifacts in the reconstructed image domain. To address these cross-domain degradations, this paper proposes RCL-Mamba, a measurement-oriented dual-domain State Space Model (SSM)-based image restoration network. The framework adopts a cascaded joint processing strategy: it first corrects the rotational blur in the projection domain and subsequently suppresses the sparse artifacts in the image domain. Additionally, we design a Mamba-CNN dual-branch module to adaptively balance large-scale blur correction with local detail recovery. Evaluations on both simulated datasets and real-world Printed Circuit Board (PCB) scans demonstrate that RCL-Mamba outperforms existing baselines in blur removal, artifact suppression, and structural preservation. Line-profile-based structural measurement further verifies that the proposed method better preserves via/pad boundaries and slender trace profiles. Crucially, by reducing the required scanning views from 512 to 64, our method enhances inspection efficiency by approximately 8-fold without compromising reconstruction quality, offering a robust measurement-oriented restoration solution for high-throughput RCL inspection with improved structural measurement fidelity.

图像恢复稀疏采样无损检测状态空间模型

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