[Submitted on 4 Sep 2026]
Title:Robust Online Aero-Engine Blade Defect Detection via Dual-Alignment Test-Time Adaptation
View a PDF of the paper titled Robust Online Aero-Engine Blade Defect Detection via Dual-Alignment Test-Time Adaptation, by Zhaoyang Wang and 6 other authors
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Abstract:Reliable visual inspection is essential for quality assurance in aero-engine blade manufacturing, where defect appearance may vary across production lines, imaging conditions, blade poses, and surface backgrounds. Such domain shifts cause a mismatch between training and deployment data and degrade the reliability of deep defect detectors in online inspection. This problem is particularly challenging because aero-engine blade images usually contain sparse defects, making pseudolabel-based adaptation vulnerable to noisy or missing predictions. To address this issue, we propose Aero-engine Blade Defect Detector (ABDD), an online adaptive detection framework based on test-time adaptation. ABDD introduces a Dual-Alignment Strategy to jointly adapt global visual style and local defect morphology by combining feature-statistics alignment with pseudo-box alignment. To reduce error accumulation from unreliable pseudo labels, an Uncertainty-aware Box Filtering mechanism evaluates pseudo boxes using classification confidence, classification entropy, and localization entropy. In addition, a lightweight Sparse Dilated Mona module enables parameter-efficient delta tuning while limiting source-domain forgetting. ABDD is evaluated on CD-AeBD and HD-AeBD under multiple domain-shift scenarios, with TTA strategies compared under a unified RT-DETR + Swin-T architecture. Experiments show that ABDD consistently improves detection robustness under domain shifts, and its practicality is further validated on an industrial inspection platform.
Comments: This manuscript is Accepted at conference PRCV 2026
Subjects:
Computer Vision and Pattern Recognition (cs.CV)
Cite as: arXiv:2610.00067 [cs.CV]
(or arXiv:2610.00067v1 [cs.CV] for this version)
https://doi.org/10.48550/arXiv.2610.00067
arXiv-issued DOI via DataCite
Submission history
From: Zhaoyang Wang [view email] [v1] Fri, 4 Sep 2026 17:18:13 UTC (3,966 KB)
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