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Near out-of-distribution detection for low-resolution radar micro-Doppler signatures

Abstract : Near out-of-distribution detection (OOD) aims at discriminating semantically similar data points without the supervision required for classification. This paper puts forward an OOD use case for radar targets detection extensible to other kinds of sensors and detection scenarios. We emphasize the relevance of OOD and its specific supervision requirements for the detection of a multimodal, diverse targets class among other similar radar targets and clutter in real-life critical systems. We propose a comparison of deep and non-deep OOD methods on simulated low-resolution pulse radar micro-Doppler signatures, considering both a spectral and a covariance matrix input representation. The covariance representation aims at estimating whether dedicated second-order processing is appropriate to discriminate signatures. The potential contributions of labeled anomalies in training, self-supervised learning, contrastive learning insights and innovative training losses are discussed, and the impact of training set contamination caused by mislabelling is investigated.
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https://hal.archives-ouvertes.fr/hal-03660033
Contributor : Martin Bauw Connect in order to contact the contributor
Submitted on : Wednesday, May 11, 2022 - 10:44:37 AM
Last modification on : Saturday, May 14, 2022 - 3:14:24 AM

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  • HAL Id : hal-03660033, version 1
  • ARXIV : 2205.07869

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Martin Bauw, Santiago Velasco-Forero, Jesus Angulo, Claude Adnet, Olivier Airiau. Near out-of-distribution detection for low-resolution radar micro-Doppler signatures. 2022. ⟨hal-03660033⟩

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