Self-Supervised Topologically Invariant Manifold Learning for Railway Image Quality Assessment

• URL: http://arxiv.org/abs/2608.15217v1
• Date: Sat, 15 Aug 2026 13:08:06 GMT
• Title: Self-Supervised Topologically Invariant Manifold Learning for Railway Image Quality Assessment
• Abstract summary: Existing blind image quality assessment (BIQA) methods rely on synthetic subjective annotations, limiting generalization in real-world domains.<n>We propose a fully self-supervised BIQA framework based on topologically invariant manifold learning under boundary constraints.<n>We show that our framework secures superior zero-shot transferability across standard synthetic and wild benchmarks.
• Score: 20.081901964453074
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Existing blind image quality assessment (BIQA) methods typically rely on synthetic distortions and subjective annotations, limiting generalization in real-world domains. To address this, we propose a fully self-supervised BIQA framework based on topologically invariant manifold learning under boundary constraints, which constructs a stable quality reference without manual labels. The framework generates progressive background dilution scales via repeated random cropping around each target; exploiting the monotonic degradation of target information density across these scales, it establishes a self-constrained quality manifold. A linearized spatial moment projection eliminates geometric distortions from random cropping; then a monotonicity divergence filter prunes background-sensitive evaluators, isolating an elite pool \(\mathcal{M}_{\text{elite}}\). A robust M-estimator with a principal component stabilizer fuses the metrics into an asymptotically efficient pseudo-ground truth \(q_{\text{PGT}}\), contracting variance toward the Cramér-Rao lower bound. Extensive evaluations demonstrate that the elite evaluator pool, distilled from 11 baseline metrics, secures superior zero-shot transferability across standard synthetic and wild benchmarks (CSIQ, LIVEC, LIVE-2). Concurrently, deployments on the CQU Railway Rolling Stock Surveillance Dataset (2,797 images) yield a manifold cosine similarity \(>0.999\) and a 100.0\% survival rate under industrial extreme stresses, robustly validating its cross-paradigm decoupling and topological resilience.

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