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arXiv · 2605.20673

Dual-Filtration Topology Recovery from Qualitative Acoustic Scattering Indicators

Xiaomei Yang·Jiaying Jia·Zhiliang Deng
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Abstract

Qualitative inverse scattering methods produce gray-scale indicator fields, from which the topology of the scatterer must be inferred without a prescribed threshold. We propose a dual-filtration method that estimates the component and cavity structure directly from the indicator. Superlevel sets are used to recover the exterior components, while sublevel persistent homology identifies interior cavities associated with the reconstructed envelope. The two types of information are combined into a binary reconstruction, allowing different topological features to be resolved at different intensity levels. We establish geometric and stability results that characterize when the topology can be reliably detected. Full-wave Lippmann--Schwinger experiments with factorization-method indicators show accurate recovery for well-resolved configurations and clear resolution transitions as component separation and cavity size vary.

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BibTeXRIS

Xiaomei Yang, Jiaying Jia, Zhiliang Deng. 2026-05-20. Dual-Filtration Topology Recovery from Qualitative Acoustic Scattering Indicators. https://arxiv.org/abs/2605.20673

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