Metric-based Few-shot Classification in Remote Sensing Image

Mengyue Zhang (The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, Hebei, 050081, China; CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang, 050081, Hebei, China)
Jinyong Chen (The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, Hebei, 050081, China; CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang, 050081, Hebei, China)
Gang Wang (The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, Hebei, 050081, China; CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang, 050081, Hebei, China)
Min Wang (The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, Hebei, 050081, China; CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang, 050081, Hebei, China)
Kang Sun (The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, Hebei, 050081, China)

Article ID: 4124

Abstract


Target recognition based on deep learning relies on a large quantity of samples, but in some specific remote sensing scenes, the samples are very rare. Currently, few-shot learning can obtain high-performance target classification models using only a few samples, but most researches are based on the natural scene. Therefore, this paper proposes a metric-based few-shot classification technology in remote sensing. First, we constructed a dataset (RSD-FSC) for few-shot classification in remote sensing, which contained 21 classes typical target sample slices of remote sensing images. Second, based on metric learning, a k-nearest neighbor classification network is proposed, to find multiple training samples similar to the testing target, and then the similarity between the testing target and multiple similar samples is calculated to classify the testing target. Finally, the 5-way 1-shot, 5-way 5-shot and 5-way 10-shot experiments are conducted to improve the generalization of the model on few-shot classification tasks. The experimental results show that for the newly emerged classes few-shot samples, when the number of training samples is 1, 5 and 10, the average accuracy of target recognition can reach 59.134%, 82.553% and 87.796%, respectively. It demonstrates that our proposed method can resolve fewshot classification in remote sensing image and perform better than other few-shot classification methods.


Keywords


Few-shot; Metric learning; Remote sensing; Target recognition; Episodic training

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DOI: https://doi.org/10.30564/aia.v4i1.4124

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