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	自己教師あり少数ショット学習	シャムニューラルネットワーク
分野	機械学習	深層学習
系統	Machine learning	Machine learning
提唱年	2019	1993
提唱者	Gidaris, S. et al.; Su, J.-C. et al. (concurrent seminal works)	Jane Bromley & Yann LeCun et al.; popularized by Koch et al.
種類	Hybrid learning paradigm (self-supervised pretraining + few-shot adaptation)	Deep metric-learning architecture
原典	Gidaris, S., Bursuc, A., Komodakis, N., Perez, P., & Cord, M. (2019). Boosting Few-Shot Visual Learning with Self-Supervision. Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV), 8059–8068.	Bromley, J., Guyon, I., LeCun, Y., Säckinger, E., & Shah, R. (1993). Signature verification using a 'Siamese' time delay neural network. Advances in Neural Information Processing Systems, 6.
別名	SSL-FSL, self-supervised meta-learning, unsupervised few-shot learning, self-supervised prototypical learning	twin network, Siamese neural network, contrastive metric network, Siyam ağı
関連	2	1
概要	Self-supervised Few-shot Learning (SSL-FSL) combines self-supervised pretraining on large unlabeled corpora with few-shot meta-learning so that a model can recognize new categories from only a handful of labeled examples. By learning rich, transferable representations without expensive annotation, SSL-FSL addresses the fundamental bottleneck of supervised few-shot methods: the need for labeled support data at scale.	A Siamese network is a deep architecture with two (or more) identical, weight-sharing branches that map inputs into an embedding space where similar inputs land close together and dissimilar ones far apart. Introduced by Bromley, LeCun, and colleagues in 1993 for signature verification and revived by Koch et al. (2015) for one-shot image recognition, it learns a similarity metric rather than fixed class labels, making it ideal for verification, matching, and few-shot tasks.