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Hardness-Aware Deep Metric Learning

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arxiv 1903.05503 v2 pith:QPS45GT6 submitted 2019-03-13 cs.CV cs.LG

classification cs.CVcs.LG
keywords metricdeeplearningtraininghardhardness-awareminingsamples
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This paper presents a hardness-aware deep metric learning (HDML) framework. Most previous deep metric learning methods employ the hard negative mining strategy to alleviate the lack of informative samples for training. However, this mining strategy only utilizes a subset of training data, which may not be enough to characterize the global geometry of the embedding space comprehensively. To address this problem, we perform linear interpolation on embeddings to adaptively manipulate their hard levels and generate corresponding label-preserving synthetics for recycled training, so that information buried in all samples can be fully exploited and the metric is always challenged with proper difficulty. Our method achieves very competitive performance on the widely used CUB-200-2011, Cars196, and Stanford Online Products datasets.

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  1. Metric Learning for Adversarial Robustness

    cs.LG 2019-09 conditional novelty 6.0 of 10

    Adding a triplet loss with semi-hard negative sampling to adversarial training improves robustness and adversarial-example detection on MNIST, CIFAR-10, and Tiny ImageNet.

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